C.E.T. averages and extremes, 1772 to 2023 (updated)

[Roger J Smith]

Daily maximum and minimum CET records continued -- April to June section

See previous post for more details on how these tables are constructed.

 

DATE ___ High max, year___Recent (or previous) __[]__ Low min, year___Recent (or previous)

01 Apr __ 19.1 _ 1999 ______ (18.4 _ 1946)* ________ ___ -4.0 _ 1967 ______ -1.5 _ 2012*

02 Apr __ 20.8 _ 1946 ______ 17.7 _ 2005 ___________ ___ -4.9 _ 1917 ______ -1.9 _ 2013

03 Apr __ 23.5 _ 1946 ______ 18.9 _ 2002 ___________ ___ -3.9 _ 1917 ______ -3.0 _ 1984

04 Apr __ 22.0 _ 1946 ______ 17.3 _ 2002 ___________ ___ -2.8 _ 1990 ______(-2.5 _ 1881)

05 Apr __ 19.9 _ 2020 ______(18.3 _ 1892)___________ ___ -3.1 _ 1990 ______(-2.5 _ 1898)*

06 Apr __ 20.3 _ 2011 ______(19.2 _ 1892)___________ ___ -2.4 _ 1911,1990 __ (tied)

07 Apr __ 18.6 _ 1933 ______ 17.5 _ 2020 ___________ ___ -3.3 _ 2021 ______(-2.3 _ 1888)*

08 Apr __ 20.3 _ 1969 ______ 19.8 _ 2020 ___________ ___ -3.6 _ 1968 ______ -1.8 _ 2003

09 Apr __ 21.4 _ 2017 ______ (19.4 _ 1909)*__________ ___-3.2 _ 1973 ______ -1.7 _ 2003

10 Apr __ 22.0 _ 2020 ______(19.3 _ 1909)*__________ ___ -1.9 _ 1924 ______ -1.7 _ 2006

11 Apr __ 21.7 _ 2020 ______(21.1 _ 1939) ___________ ___ -3.4 _ 1978 ______ -1.7 _ 2021

12 Apr __ 20.8 _ 2020 ______(20.4 _ 1939) ___________ ___ -2.0 _ 2021 ______(-1.7 _ 1911)

13 Apr __ 19.3 _ 1945 ______ 17.4 _ 2003 ____________ ___ -2.3 _ 2021 ______(-1.4 _ 1879)

14 Apr __ 21.5 _ 2007 ______(20.5 _ 1979) ___________ ___ -3.3 _ 1892 ______ -1.9 _ 1999*

15 Apr __ 23.3 _ 1949 ______ 22.8 _ 2003*___________ ___ -3.6 _ 1892 ______ -2.2 _ 1999

16 Apr __ 25.0 _ 2003 ______(22.2 _ 1945) ___________ ___ -2.3 _ 1892 ______ -1.7 _ 2012

17 Apr __ 22.4 _ 2003 ______(21.2 _ 1945)*___________ ___-2.4 _ 1892 ______ -1.4 _ 2021

18 Apr __ 22.4 _ 2018 ______(21.0 _ 1945,52)_________ ___-2.8 _ 1892 ______ -0.1 _ 1989

19 Apr __ 24.3 _ 2018 ______(22.8 _ 1893) ___________ ___ -2.3 _ 1892 ______ -2.0 _ 1995

20 Apr __ 23.4 _ 1893 ______ 22.8 _ 2019 ____________ ___ -1.7 _ 1969 ______ -1.1 _ 1991

21 Apr __ 23.7 _ 1893 ______ 23.1 _ 2011 ____________ ___ -2.3 _ 1936 ______ -2.1 _ 1997

22 Apr __ 23.4 _ 2011 ______(21.7 _ 1901)*___________ ___ -1.0 _ 1879 ______ -0.3 _ 2010,21

23 Apr __ 22.4 _ 2011 ______(21.5 _ 1901)____________ ___ -2.3 _ 1936 ______ -0.9 _ 1981

24 Apr __ 21.9 _ 1893 ______ 20.5 _ 1987 ____________ ___ -3.0 _ 1908 ______ -1.2 _ 1988

25 Apr __ 22.9 _ 1893 ______ 21.0 _ 1984 ____________ ___ -1.3 _ 1908 ______ -1.1 _ 1989

26 Apr __ 22.5 _ 1928 ______ 20.6 _ 1984 ____________ ____-2.0 _ 1900 ______ -1.8 _ 1985

27 Apr __ 19.8 _ 1916,64 ___ 19.7 _ 1987 ____________ ___ -0.7 _ 1906 ______ -0.3 _ 2016

28 Apr __ 22.0 _ 1987 ______ (19.3 _ 1914,15,21)*____ ___ -1.4 _ 2016 ______(-1.1 _ 1941)

29 Apr __ 21.2 _ 1994 ______ (19.6 _ 1915)^ *_________ ___ -1.4 _ 1976 ______ +0.7 _ 2021

30 Apr __ 22.2 _ 1990 ______ (21.2 _ 1958) ____________ ___-2.2 _ 1927 ______ +0.4 _ 2016*

 

* 1st _ also 18.2 in 1990 (not a record). _______________________________* 1st _ -3.5 in 1917 not a record (broken in 1967)

* 9th _ 19.5 in 2011 record to 2017, also 19.8 in 2020 not a record _ *5th _ -3.0 in 2006 not a record

*10th _ 20.0 in 1981, 2015 records to 2020. _________________________ * 7th _ -3.0 in 2013 a record to 2021

*15th _ 21.8 in 2007, not a record. ___________________________________ *14th _ -1.3 in 1966, very cold maximum for low daily mean

*17th _ 21.3 in 1987, record to 2003.

*22nd _ 22.4 in 2019, not a record.

*28th _ 19.5 in 2007, 19.8 in 2010, not records.

*29th _ 20.6 in 1987, record to 1994. 19.9 in 1993 not a record. ___ *30th _ -1.4 in 1945, not a record, cold max for low daily mean

^ Maxima of 24-27 were likely in 1775 on this and adjacent days. Minima around 10-15 in 1837 very low, some could be records.

==========================

DATE ___ High max, year ___ Recent (or previous) __[]__ Low min, year ___ Recent (or previous)

01 May __ 23.7 _ 1966 ______ 23.1 _ 1990 __________ ___ -1.0 _ 1927 ______ +0.3 _ 2021

02 May __ 24.2 _ 1990 ______ (23.4 _ 1966) _________ ___ -0.4 _ 1979 ______ +0.3 _ 2021

03 May __ 25.5 _ 1990*______ (20.7 _ 1923)* _______ ___ -1.5 _ 1967 ______ +0.4 _ 2014

04 May __ 25.2 _ 1990,2006*__ (22.2 _ 1893)* _______ ___ -1.5 _ 1941 ______ -0.3 _ 1996

05 May __ 23.7 _ 1995*______ (22.5 _ 1970)*_________ ___-0.5 _ 1982 ______ (-0.4 _ 1979)

06 May __ 23.9 _ 1995*______ (21.7 _ 1889)* ________ ___+0.8 _ 1996 ______(+1.0 _ 1957)

07 May __ 25.6 _ 2018 ______ (23.3 _ 1976)* ________ ___ -0.5 _ 1892 ______ +0.8 _ 1997

08 May __ 25.0 _ 2016*______ (22.5 _ 1960)* _______ ____-0.9 _ 1938 ______ +0.8 _ 1996

09 May __ 23.1 _ 2016*______ (21.5 _ 1947,59)* ____ ___ +0.2 _ 1910, 1980, 1984 _ (tied)

10 May __ 24.3 _ 1959 ______ 23.5 _ 2008 __________ ___ -1.3 _ 1879 ______ +0.6 _ 2017

11 May __ 25.2 _ 2008 ______ (24.6 _ 1884) _________ ___ -0.3 _ 1881 ______ +0.6 _ 2005

12 May __ 25.3 _ 1945 ______ 23.7 _ 2001___________ ___ -0.9 _ 2020 ______(+0.1 _ 1885)

13 May __ 24.4 _ 1965 ______ 23.8 _ 2001 ___________ ___-0.4 _ 2010 ______(+0.4 _ 1922)

14 May __ 26.0 _ 1965 ______ 25.8 _ 1992 ___________ ___ -0.6 _ 2020 ______(-0.4 _ 1902)

15 May __ 23.7^_ 2000*_____ (22.7 _ 1919)*________ ___ +0.2 _ 1915 ______ +1.5 _ 2020

16 May __ 24.5 _ 1952 ______ 23.6 _ 2002 ___________ ___ -0.4 _ 1941 ______ +1.1 _ 2012

17 May __ 26.4 _ 1952 ______ 21.7 _ 2002, 14 ________ ___-1.3 _ 1935*______ +1.8 _ 2005*

18 May __ 26.2 _ 1952 ______ 22.5 _ 2014 ____________ ___-0.7 _ 1891 ______ +1.5 _ 1996

19 May __ 24.6 _ 1992 ______ (23.7 _ 1888)* _________ ___ -0.4 _ 1891*______ +2.3 _ 2008*

20 May __ 25.5 _ 2020 ______ (24.9 _ 1916) ___________ ___+1.9 _ 1956 ______ +2.4 _ 2008

21 May __ 26.2 _ 1918*______ 24.7 _ 1989* __________ ___ +0.4 _ 1894 ______ +3.6 _ 1988

22 May __ 26.5 _ 1918 ______ 24.4 _ 1992 ____________ ___ +0.4 _ 1894*______+3.6 _ 2004*

23 May __ 26.1 _ 1922 ______ 25.8 _ 2010 ____________ ___ +2.0 _ 1905 ______ +3.0 _ 2004

24 May __ 25.3 _ 1992*______ (24.6 _ 1884)* __________ ___+0.9 _ 1923 ______+2.2 _ 1997

25 May __ 27.7 _ 1953 ______ 25.6 _ 2017 _____________ ___+2.4 _ 1948 ______ +2.8 _ 1997

26 May __ 25.5 _ 2017*______ (24.3 _ 1913)* __________ ___+1.7 _ 1914 ______ +2.7 _ 1990

27 May __ 25.6 _ 2005*______ (22.9 _ 1931)* __________ ___+1.1 _ 1914 ______ +3.7 _ 1984, 90

28 May __ 26.2 _ 1944 ______ 24.8 _ 2012 _____________ ___+1.3 _ 1899 ______ +4.8 _ 1996

29 May __ 29.0 _ 1944*______ 23.5 _ 2003, 09*________ ___+2.8 _ 1927 ______ +4.4 _ 2007

30 May __ 27.4 _ 1944*______ 24.9 _ 2003*____________ ___+2.8 _ 1915,74 ___+4.2 _ 2007

31 May __ 28.5 _ 1947*______ 26.2 _ 2003*____________ ___+0.8 _ 1975*______+3.1 _ 1989*

_____________________________________

______ Notes:

* 3rd _ 23.5 in 1995 (not a record).

* 4th _ 24.2 in 1995 (not a record).

* 5th _ 22.5 in 1990, tied 1970, ties broken by 1995.

* 6th _ 23.7 in 2018 and 22.4 in 2000, 22.2 in 2011 (not records)

* 8th _ 23.0 in 2008, record until 2016.

* 9th _ 22.4 in 2008, record until 2016.

*15th_ 22.9 in 1982 (record until 2000), 22.8 in 1998 (not a record) __ *17th _ also -1.2 in 1891

*19th _ 23.7 in 2014 (not a record). ______________________________________*19th _ 0.2 in 1956, not a record.

*21st _ also 26.1 in 1909, 25.5 in 1916, 1922. ___________________________*22nd _ 1.2 in 1905, not a record.

*24th _ 24.5 in 1989 and 24.6 in 2012  (not  records).

*26th _ 24.6 in 1992 (record until 2017) 24.4 in 2012 (not a record).

*27th _ 23.7 in 1999 (record until 2005); 25.1 in 2012 (not a record).

*29th _ 28.6 in 1947 (not a record).

*30th _ 27.2 in 1895 (record until 1944).

*31st _ 26.3 in 1978 (not a record) ________________________________________ *31st _ also +1.2 in 1915

^ higher maxima may have occurred mid-month in 1833, 1834.

===========================================

DATE ___High max, year ___Recent (or previous) __[]__ Low min, year ___ Recent (or previous)

01 Jun __ 26.8 _ 1922*______24.5 _ 1982*__________ ___ 1.9 _ 1962 ______ 4.8 _ 1989

02 Jun __ 30.0 _ 1947 ______ 25.2 _ 1982, 2021 _____ ___ 2.6 _ 1991*______(3.6 _ 1962)*

03 Jun __ 29.6 _ 1947 ______ 24.6 _ 1982 __________ ___ 3.9 _ 1975 ______ 4.1 _ 1989

04 Jun __ 27.5 _ 1933 ______ 26.7 _ 1982 __________ ___ 1.8 _ 1991*______(2.8 _ 1975)*

05 Jun __ 28.4 _ 1942 ______ 27.7 _ 1982 __________ ___ 1.3 _ 1991 ______(3.4 _ 1880) 

06 Jun __ 29.9 _ 1950 ______ 25.7 _ 1996 __________ ___ 3.7 _ 1920 ______ 5.7 _ 2014

07 Jun __ 27.8 _ 1940 ______ 25.2 _ 2004 __________ ___ 3.6 _ 2005 ______ (5.1 _ 1916) 

08 Jun __ 28.5 _ 1976 ______ 26.5 _ 2004 __________ ___ 3.1 _ 1985*______(4.1 _ 1890)*

09 Jun __ 28.3 _ 1940 ______ 25.0 _ 2006 __________ ___ 3.1 _ 1881 ______ 3.8 _ 2015

10 Jun+__ 28.4 _ 1970 ______ 27.4 _ 2006 __________ ___ 2.8 _ 1911*______ 4.8 _ 2015

11 Jun+__ 28.3 _ 1925 ______ 25.4 _ 2006 __________ ___ 4.7 _ 1942 ______ 5.2 _ 2011

12 Jun+__ 25.8 _ 2006 ______(25.6 _ 1897)__________ ___ 4.1 _ 1957 ______ 4.3 _ 2011

13 Jun+__ 26.4 _ 1897 ______ 25.8 _ 1989 __________ ___ 3.5 _ 1892 ______ 5.8 _ 2012

14 Jun+__ 25.1 _ 1887 ______ 24.5 _ 2004 __________ ___ 3.7 _ 1973 ______ 6.2 _ 2011

15 Jun+__ 26.9 _ 1896 ______ 25.2 _ 1986 __________ ___ 2.5 _ 1895*______5.5 _ 1985*

16 Jun __ 27.5 _ 1957 ______ 26.4 _ 1986 __________ ___ 4.3 _ 1918 ______ 5.2 _ 2008

17 Jun __ 28.3 _ 1957 ______ 26.6 _ 2017 __________ ___ 2.9 _ 1916 ______ 4.8 _ 1985

18 Jun __ 29.4 _ 2000 ______(28.1 _ 1893)__________ ___ 3.7 _ 1892 ______ 7.3 _ 1991, 1999

19 Jun __ 29.1 _ 2005,2017*_(27.6 _ 1893)*_________ ___3.6 _ 1915 ______ 4.0 _ 2004

20 Jun __ 27.5 _ 1989 ______(27.4 _ 1936) __________ ___ 4.0 _ 1964 ______ 6.1 _ 1991

21 Jun __ 29.8 _ 2017 ______(29.5 _ 1941) __________ ___ 4.0 _ 1903 ______ 7.2 _ 2004

22 Jun __ 28.1 _ 1935 ______ 26.7 _ 2003 ___________ ___ 5.1 _ 1903 ______ 5.2 _ 2004

23 Jun __ 28.0 _ 1935 ______ 25.5 _ 2005 ___________ ___ 4.1 _ 1957 ______ 5.0 _ 2021

24 Jun __ 29.2 _ 2020 ______(28.0 _ 1935)___________ ___ 5.4 _ 1926 ______ 7.5 _ 1993,2011

25 Jun __ 29.4 _ 2020 ______(29.1 _ 1976)___________ ___ 5.3 _ 1926,31 ___ 5.8 _ 2013

26 Jun __ 30.0 _ 1878*______28.8 _ 2001 ___________ ___ 5.1 _ 1918,29 ___ 7.8 _ 2004

27 Jun __ 29.9 _ 1976*______28.0 _ 2011 ___________ ___ 4.8 _ 1919 ______ 6.0 _ 1981

28 Jun __ 30.3 _ 1976 ______ 28.7 _ 1995 ___________ ___ 5.2 _ 1921 ______ 5.7 _ 1981

29 Jun __ 30.6 _ 2019 _______(30.1 _ 1976)__________ ___4.6 _ 1907 ______ 5.9 _ 1981

30 Jun __ 29.8 _ 1976 ______ 29.1 _ 1995 ___________ ___ 5.3 _ 1972 ______ 5.6 _ 1989

___________

* 1st _ 26.3 in 1978, not a record. (24.3 in 2020)

+ 10-15 June 2023 new records in v2.0 (no CET legacy) include 28.6 on 10 June, 27.6 11 June (recent only), 28.4 12 June, 27.5 13 June and 25.9 14 June. In v2.0 record max was 25.2 (1896) as 1887 reduced to 25.0. 15 June (recent only) 25.8  

* 19th _ 27.8 in 2000, record until 2005 ________________________* 2nd _ 3.2 in 1989 record until 1991.

____________________________________________________________________* 4th _ 3.6 in 1989 (not a record)

* 26th _ 29.4 in 1976 (not a record) ____________________________ * 8th _ 4.8 in 2015 (not a record)

* 27th _ 29.4 in 1878 (broken by 1976) ________________________*10th _ also 3.0 in 1955

____________________________________________________________________*15th _ also 2.7 in 1892, 3.0 in 1911 and 3.3 in 1956

Edited June 16, 2023 by Roger J Smith
noting records on 10, 11, 12, 13, 14 June

[Roger J Smith]

Daily maximum and minimum CET records continued -- July to September section

See previous post for more details on how these tables are constructed.

NOTE: These tables were constructed using legacy CET data. As part of a thread overhaul, eventually these tables will be edited to show v2.0 values in addition to these. That has already been done in another thread in the current weather section discussing the change from CET legacy to v2.0.

The CET legacy series ceased to be updated on 1 May 2022. Since then, 18 June had its v2.0 record (28.2, 1957) tied, and several records in July and August have been broken (both the legacy and v2.0 date records). Those are shown by asterisk notes at present.

Various daily records have been broken since this CET legacy data set terminated. The v2.0 values are shown as notes to those dates.

 

DATE ___High max, year___Recent (or previous)__[]__Low min, year ___ Recent (or previous)

01 Jul __ 32.7 _ 2015 ______ (30.6 _ 1976) __________ ___5.7 _ 1888 ______ 6.8 _ 2011

02 Jul __ 31.8 _ 1976 ______ 29.2 _ 2006 ___________ ___ 6.4 _ 1921 ______ 7.9 _ 2019

03 Jul __ 33.2 _ 1976 ______ 28.9 _ 2006 ___________ ___ 6.4 _ 1988*______(6.7 _ 1907)*

04 Jul __ 31.4 _ 1976 ______ 28.1 _ 2006 ___________ ___ 4.7 _ 1965 ______ 7.3 _ 1984

05 Jul __ 31.4 _ 1976 ______ 28.5 _ 2001 ___________ ___ 7.2 _ 1898 ______ 7.9 _ 1984

06 Jul __ 31.6 _ 1976 ______ 28.5 _ 1989 ___________ ___ 6.3 _ 1954 ______ 7.6 _ 2016

07 Jul __ 30.4 _ 1976*______27.6 _ 2018 ___________ ___ 5.5 _ 1954 ______ 8.3 _ 1996

08 Jul __ 30.0 _ 1984 ______(29.6 _ 1976) __________ ___ 5.2 _ 1929* _____ 8.8 _ 2007*

09 Jul __ 28.8 _ 1921 ______ 26.6 _ 1983 ___________ ___ 7.0 _ 1919 ______ 8.5 _ 1986, 2015

10 Jul __ 30.1 _ 1921 ______ 28.8 _ 1995 ___________ ___ 6.7 _ 1890 ______ 7.2 _ 1993

11 Jul __ 29.2 _ 1983 ______(29.0 _ 1900) __________ ___ 5.1 _ 1888 ______ 6.6 _ 1993

12 Jul __ 31.1 _ 1923*______29.0 _ 1983*___________ ___5.1 _ 1902 ______ 6.7 _ 2020

13 Jul __ 30.6 _ 1923 ______ 28.7 _ 1983 ___________ ___ 5.6 _ 1993 ______(6.8 _ 1888)

14 Jul __ 29.6 _ 2003*______(28.4 _ 1926)*_________ ___ 6.5 _ 1898 ______ 7.6 _ 2011

15 Jul __ 31.1 _ 2003 ______ (28.9 _ 1912)___________ ___6.5 _ 1977 ______ 8.8 _ 2001

16 Jul __ 29.3 _ 1983*______(28.2 _ 1929,69)*_______ ___6.9 _ 2001 ______(7.7 _ 1883)

17 Jul+__ 29.6 _ 2006*______ (27.8 _ 1921)*_________ ___ 6.2 _ 1965 ______ 7.4 _ 1996

18 Jul+__ 30.9 _ 2006 ______ (29.4 _ 1901)___________ ___ 5.8 _ 1971 ______ 8.5 _ 1996

19 Jul+__ 32.9 _ 2006*______(29.7 _ 1901)*__________ ___ 7.2 _ 1892 ______ 8.9 _ 2004

20 Jul __ 29.6 _ 1901 ______ 28.3 _ 2021 ____________ ___ 7.3 _ 1890 ______ 7.4 _ 2020

21 Jul __ 29.7 _ 1989 ______(29.5 _ 1911) ___________ ___ 7.0 _ 2020 ______ (7.4 _ 1906)

22 Jul __ 29.4 _ 1989*______(28.5 _ 1925)*__________ ___ 7.2 _ 1970 ______ 9.5 _ 2002

23 Jul __ 30.2 _ 2019*______(26.6 _ 1955)*__________ ___ 8.1 _ 1883 ______ 8.3 _ 2011

24 Jul __ 28.5 _ 2019*______(27.3 _ 1900)*__________ ___ 6.9 _ 1973 ______ 8.1 _ 1990

25 Jul __ 34.1 _ 2019*______ (28.2 _ 1885)*__________ ___6.8 _ 1920 ______ 7.6 _ 1998

26 Jul __ 30.7 _ 2018*______(28.6 _ 1885)*___________ ___6.9 _ 1884______ 9.0 _ 2015

27 Jul __ 29.7 _ 2018 ______ (28.9 _ 1948)____________ ___6.9 _ 1882 ______ 8.2 _ 1999

28 Jul __ 30.8 _ 1948 ______ 27.6 _ 2001 _____________ ___5.7 _ 1881 ______ 9.2 _ 1992

29 Jul __ 31.6 _ 1948*______28.2 _ 1995* ____________ ___7.8 _ 1896 ______ 8.4 _ 2015

30 Jul __ 30.5 _ 1948 ______ 28.4 _ 1995 _____________ ___6.6 _ 1898 ______ 7.8 _ 2011

31 Jul __ 33.2 _ 2020*______(30.9 _ 1943)*___________ ___5.4 _ 2015 ______(6.5 _ 1898)

_______________________________ Notes:

* 7th _ 30.1 in 1970 record until 1976 _________________________ * 3rd _ also 6.6 in 1990 (not a record)

*12th _ also 30.2 in 1949 (not a record) ________________________*8th _ also 5.6 in 1900, 6.1 1897,1913

___________________________________________________________________  (no other notes for minima) 

*14th _ 28.7 in 1983, record until 2003  __ *16th _ also 28.5 in 2003 (not a record)

*17th _ also 28.1 in 2013 (not a record) __ *19th _ also 28.9 in 2013, 30.9 in 2016 and 29.1 in 2021 (not records)

 +NOTE: 17th 2022 _ 30.0, 18th 2022 _ 34,8, 19th 2022 _ 37.3 new records in v2.0 (no CET legacy values)

*22nd _ also 29.1 in 1996, 2021 (not records)  __ *23rd _ 28.1 in 1989 record until 2019; also 28.0 in 2018 (not a record)

*24th _ 28.2 in 1989 record until 2019 __ *25th _ 28.3 in 1989, record until 2006 (30.2) record until 2019

*26th _ 28.6 in 2006, tied 1885, tied record broken 2018 __ *29th _ also 29.9 in 1911, broken by 1948.

*31st _ also 30.2 in 1995 (not a record)

Note also that some higher values may have occurred  in 1868 and in 1808, 1825 and 1826.

________________________________________________

 

DATE ___High max, year___Recent (or previous)__[]__Low min, year ___ Recent (or previous)

01 Aug __ 31.9 _ 1995 ______ (27.1 _ 1899) _________ ___ 6.2 _ 1976 ______ 7.7 _ 1986

02 Aug __ 32.8 _ 1990*______ (27.7 _ 1899)*________ ___6.5 _ 1966 ______ 7.4 _ 1981

03 Aug __ 33.2 _ 1990*______ (30.3 _ 1975)*________ ___5.2 _ 1912 ______ 7.7 _ 1983

04 Aug __ 31.9 _ 1975 ______ 29.0 _ 2003___________ ___7.3 _ 1934 ______ 7.6 _ 2020

05 Aug __ 29.1 _ 2003 ______ (28.3 _ 1897) _________ ___6.8 _ 1956 ______ 7.7 _ 1987

06 Aug __ 28.5 _ 2003 ______ (28.3 _ 1933) _________ ___ 6.1 _ 1987 ______(7.0 _ 1893)

07 Aug __ 31.0 _ 1975 ______ 28.9 _ 2020 ___________ ___6.4 _ 1961 ______ 8.3 _ 1987

08 Aug __ 30.1 _ 1975 ______ 28.8 _ 2004 ___________ ___6.8 _ 1955*______7.2 _ 2005*

09 Aug __ 32.8 _ 2003 ______ (31.5 _ 1911) __________ ___6.7 _ 1931 ______ 7.7 _ 1995

10 Aug __ 30.3 _ 1997*______ (26.2 _ 1969)*_________ ___6.0 _ 1892 ______ 7.1 _ 1987

11 Aug+__ 30.7 _ 2020*______ (29.4 _ 1884)*_________ ___5.1 _ 1892 ______ 7.1 _ 2018

12 Aug __ 32.0 _ 2020 ______ (29.8 _ 1953)___________ ___5.0 _ 1912 ______ 9.4 _ 2015

13 Aug*__ 30.1 _ 1911 ______ 24.4 _ 2003 ____________ ___6.3 _ 1993 ______(6.6 _ 1960)

14 Aug+__ 28.3 _ 1911 ______ 27.4 _ 1983 ____________ ___5.2 _ 1885 ______ 7.2 _ 1982

15 Aug __  28.4 _ 1893 ______ 26.8 _ 1995, 2001______ ___4.4 _ 1885 ______ 7.7 _ 1994

16 Aug __ 29.2 _ 1947 ______ 27.6 _ 1997 ____________ ___5.9 _ 1966 ______ 6.9 _ 2015

17 Aug __ 29.0 _ 1893 ______ 27.9 _ 1995 ____________ ___7.0 _ 1908, 63, 71 __7.4 _ 1981

18 Aug __ 29.5 _ 1893 ______ 28.7 _ 1996 ____________ ___5.7 _ 1946 ______ 7.8 _ 2011

19 Aug __ 30.3 _ 1932 ______ 29.4 _ 1997 ____________ ___5.1 _ 1885 ______ 6.9 _ 2011

20 Aug __ 28.8 _ 1995*______(28.2 _ 1959)*__________ ___4.7 _ 1964 ______ 6.2 _ 2014

21 Aug __ 29.2 _ 1995*______(27.4 _ 1935)*__________ ___5.5 _ 1964 ______ 6.1 _ 1986

22 Aug __ 29.2 _ 1995 ______ (28.1 _ 1955)___________ ___5.3 _ 1964 ______ 6.1 _ 1999

23 Aug __ 28.1 _ 1955 ______ 27.7 _ 2016 ____________ ___5.9 _ 1903 ______ 6.8 _ 1993

24 Aug __ 28.9 _ 1976 ______ 27.1 _ 1990, 2019 ______ ___ 5.5 _ 1966 ______ 6.3 _ 2014

25 Aug __ 29.9 _ 2019 ______(28.9 _ 1899)____________ ___5.9 _ 1904*______7.2 _ 2006*

26 Aug __ 27.2 _ 1930 ______ 26.8 _ 2019 ____________ ___4.8 _ 1931 ______ 7.5 _ 1993

27 Aug __ 30.2 _ 1930 ______ 26.8 _ 2019 ____________ ___5.9 _ 1896 ______ 7.0 _ 1993

28 Aug __ 29.8 _ 1942*______24.6 _ 2017*___________ ___ 4.8 _ 1935 ______ 6.2 _ 1989

29 Aug __ 29.6 _ 1961*______24.4 _ 1990*___________ ___ 6.3 _ 1959 ______ 7.4 _ 1986

30 Aug __ 27.7 _ 1886 ______ 25.7 _ 2005 ____________ ___4.1 _ 1890 ______ 6.1 _ 1983

31 Aug __ 30.4 _ 1906 ______ 28.0 _ 2005 ____________ ___4.0 _ 1921*______ 4.9 _ 2012*

________________________ Notes:

* 2nd _ 31.4 in 1995 (not a record)

* 3rd _ 30.3 in 1995 (not a record) __________________________ * 8th _ also 6.9 in 1895, record to 1955. 

*10th _ 27.8 in 1995, record to 1997, 28.5 in 2003 (not a record) and 29.0 in 2020 (not a record)

*11th _ 30.3 in 1995, record until 2020

+NOTE: 11th 2022 _ 30.9, 13th 2022 _31.4, 14th 2022 _ 31.7 in v2.0 (12th 2022 31.4 not a new record) (no CET legacy values)

*20th _ 28.2 in 1984 tied 1959, ties broken in 1995.

*21st _ 28.4 in 1984 record until 1995._____________________* 25th _ also 6.4 in 1934, not a record. 

*28th _ 29.4 in 1930, broken in 1942. ______________________ *28th _ also 5.1 in 1919.

*29th _ 29.2 in 1930, broken in 1961. ______________________ *31st _ 4.1 in 1890, broken by 4.0 1921, also 4.6 1934.

__________________________________________________________________ recent: (5.1 2010 broken by 4.9 2012)

================================

 

DATE ___High max, year___Recent (or previous)__[]__Low min, year ___ Recent (or previous)

01 Sep __ 31.0 _ 1906 ______ 26.5 _ 1991 _________ ___ 2.5 _ 1890 ______ 5.9 _ 2002

02 Sep __ 31.3 _ 1906 ______ 26.2 _ 1991 _________ ___ 3.0 _ 1909 ______ 6.6 _ 2002

03 Sep __ 26.3 _ 1906 ______ 24.7 _ 1999 _________ ___ 3.4 _ 1923 ______ 7.1 _ 1994

04 Sep __ 27.9 _ 1880*______ 26.9 _ 2005 _________ ___ 3.6 _ 1907 ______ 4.3 _ 2000

05 Sep __ 26.6 _ 1999*______(26.4 _ 1949)_________ ___ 3.6 _ 1915 ______ 6.8 _ 1993

06 Sep __ 25.5 _ 1898*______ 25.4 _ 1999 _________ ___ 4.1 _ 2015 ______(4.2 _ 1952)

07 Sep __ 28.3 _ 2021*______(27.7 _ 1911)_________ ___ 4.7 _ 1952 ______ 5.1 _ 1985

08 Sep __ 29.6 _ 1911 ______ 28.2 _ 2021*_________ ___ 2.5 _ 1931 ______ 4.3 _ 2019

09 Sep __ 25.9 _ 1895*______ 24.5 _ 2012 _________ ___ 3.1 _ 1986 ______(4.2 _ 1909)

10 Sep __ 26.5 _ 1959*______ 24.3 _ 2006 _________ ___ 3.2 _1897, 1944__ 4.7 _ 1986

11 Sep __ 27.3 _ 1919 ______ 26.8 _ 2006 _________ ___ 2.9 _ 1944 ______ 4.4 _ 1986

12 Sep __ 25.5 _ 1891 ______ 23.7 _ 1985 _________ ___ 2.6 _ 1908 ______ 5.7 _ 1986

13 Sep __ 26.4 _ 2016 ______(25.3 _ 1891)_________ ___ 2.8 _ 1925 ______ 4.0 _ 1986

14 Sep __ 26.4 _ 2016*______(25.4 _ 1934)*_______ ___ 3.5 _ 1996 ______ (3.8 _ 1882)

15 Sep __ 27.4 _ 2020 ______(24.4 _ 1934)_________ ___ 3.4 _ 1903 ______ 4.1 _ 1986

16 Sep __ 26.3 _ 1898 ______ 25.4 _ 2003 _________ ___ 3.2 _ 1903 ______ 3.5 _ 1986

17 Sep __ 27.4 _ 1898 ______ 26.0 _ 2003 _________ ___ 3.1 _ 2005*_____ (4.1 _ 1903)*

18 Sep __ 25.4 _ 1926 ______ 25.3 _ 1982 _________ ___ 2.9 _ 1952 ______ 4.7 _ 2007

19 Sep __ 27.1 _ 1926 ______ 21.0 _ 1998 _________ ___ 2.0 _ 1986 ______(2.5 _ 1952)

20 Sep __ 22.9 _ 1970 ______ 22.5 _ 1998 __________ ___1.4 _ 1952*______4.0 _ 1986*

21 Sep __ 27.1 _ 2006*_____(21.9 _ 1940)*_________ ___2.2 _ 1964 ______ 5.5 _ 2000

22 Sep __ 22.9 _ 1956 ______ 21.3 _ 2020 __________ ___1.8 _ 1911, 79*__ 2.5 _ 2012*

23 Sep __ 23.3 _ 2000 ______(23.1 _ 1895)__________ ___2.2 _ 1914 ______ 5.4 _ 2012

24 Sep __ 25.1 _ 1895 ______ 21.9 _ 2021 __________ ___1.5 _ 1878 ______ 2.7 _ 2003

25 Sep __ 24.2 _ 1895 ______ 20.2 _ 2006 __________ ___2.1 _ 2018*______(3.5 _ 1889)*

26 Sep __ 25.4 _ 1895 ______ 21.4 _ 1985 __________ ___1.1 _ 1885 ______ 3.3 _ 1986

27 Sep __ 24.9 _ 1895 ______ 22.2 _ 1985 __________ ___1.1 _ 1885 ______ 2.3 _ 1987

28 Sep __ 24.8 _ 2011____(24.7 _ 1895, 1970) ______ __ 0.5 _ 1885, 1919 __3.0 _ 2020

29 Sep __ 26.4 _ 2011______(23.7 _ 1895)__________ ___ 0.3 _ 1919 ______ 2.0 _ 2018

30 Sep __ 27.3 _ 2011*_____(24.4 _ 1908)*_________ ___0.8 _ 1914 ______ 2.3 _ 1988

_____________________________ Notes:

________________________________________________________ * 1st _ also 4.5 in 1934 (not a record). 

*14th _ also 25.8 in 2020 (not a record). _____________________ *17th _ 3.7 in 1986 record until 2005

_________________________________________________________________*20th _ 1.5 in 1919 record until 1952.

*21st _ 24.4 in 1989 was a record until 2006. also 23.7 in 2019 (not a record).

________________________________________________________________ *22nd _ also 2.0 in 1948 (not a record).

*30th _ also 22.8 in 1985, not a record. _____________________ *25th _ 3.0 in 2003, record until 2018,

_______________________________________________________________________ also 3.5 in 2010 (not a record).

4-10 Sep records broken in v2.0 in 2023. 

4 Sep 28.1, 5 Sep 27.7, 6 Sep 28.1, 7 Sep 28.8, 8 Sep 28.6 (broke only recent), 9 Sep 28.9, 10 Sep 27.1

Edited September 11, 2023 by Roger J Smith
new records 4-7 Sep 2023

[Roger J Smith]

Daily maximum and minimum CET records continued -- October to December section

See previous post (Jan to Mar) for more details on how these tables are constructed.

 

DATE___ High max, year___Recent (or previous) __[]__ Low min, year___Recent (or previous)

01 Oct __ 27.1 _ 2011*______(23.5 _ 1908)*__________ ___ 0.1 _ 1928 ______ 2.0 _ 1988

02 Oct __ 24.2 _ 2011 ______ (22.9 _ 1959)___________ ___ 0.1 _ 1888 ______ 3.3 _ 2019

03 Oct __ 25.5 _ 1959 ______ 24.2 _ 2011 ____________ ___ 0.1 _ 1888 ______ 1.6 _ 2019

04 Oct __ 23.7 _ 1959 ______ 20.2 _ 1983 ____________ ___-0.5 _ 1912 ______ 0.5 _ 1994

05 Oct __ 23.4 _ 1921 ______ 19.2 _ 2001 ____________ ___-0.4 _ 1888 ______ 0.7 _ 1999

06 Oct __ 24.6 _ 1921 ______ 18.8 _ 2013 ____________ ___-0.3 _ 1888 ______ 1.5 _ 2008

07 Oct __ 21.5 _ 1965 ______ 19.1 _ 1986 ____________ ___-0.2 _ 1888 ______ 1.3 _ 2018

08 Oct __ 23.3 _ 1995 ______(21.2 _ 1921) ___________ ___ 0.7 _ 1912 ______ 0.8 _ 1990

09 Oct __ 24.0 _ 1921*______21.0 _ 1995*___________ ___ 0.8 _ 1925 ______ 3.9 _ 1998

10 Oct __ 22.8 _ 2018*______(21.2 _ 1921)*__________ ___-0.1 _ 1925 ______ 3.4 _ 1994

11 Oct __ 23.0 _ 1978 ______ 20.8 _ 2005 ____________ ___-1.0 _ 1952 ______ 2.8 _ 1988

12 Oct __ 22.3 _ 1978 ______ 21.7 _ 1990 ____________ ___-0.9 _ 1887 ______ 3.7 _ 2014

13 Oct __ 22.0 _ 2018*______(18.9 _ 1924)*__________ ___-0.7 _ 1964 ______ 2.3 _ 1999

14 Oct __ 19.2 _ 1990, 2017__(18.4 _ 1949)___________ ___ 0.3 _ 1917 ______ 0.7 _ 2012

15 Oct __ 19.1 _ 1908 ______ 18.7 _ 1990, 2017  ______ ___-1.5 _ 1917 ______ 0.0 _ 1993

16 Oct __ 20.5 _ 2017 ______(19.0 _ 1959)___________ ___ -2.7 _ 1993______(- 2.0 _ 1955)

17 Oct __ 19.1 _ 1969 ______ 18.5 _ 2014 ___________ ___ -2.2 _ 1905 ______-1.9 _ 1993

18 Oct __ 21.8 _ 1921 ______ 20.6 _ 1997 ___________ ___ -2.2 _ 1955 ______ 0.1 _ 1998

19 Oct __ 20.2 _ 1997 ______(18.6 _ 1921)____________ ___-3.0 _ 1926 ______-0.9 _ 2002

20 Oct __ 18.5 _ 1969 ______ 17.4 _ 2020 ____________ ___-1.6 _ 1905 ______ 0.5 _ 1993

21 Oct __ 18.9 _ 1968 ______ 17.4 _ 1998 ____________ ___-2.2 _ 1935 ______-1.7 _ 2003

22 Oct __ 19.4 _ 1971 ______ 17.1 _ 2013 ____________ ___-2.8 _ 1931 ______ 0.9 _ 1983

23 Oct __ 18.7 _ 2011*_____(18.5 _ 1971)*___________ ___-2.6 _ 1951 ______-0.3 _ 1983

24 Oct __ 18.2 _ 1995*_____(17.3 _ 1978)____________ ___-3.7 _ 1895*______-0.2 _ 2003*

25 Oct __ 17.8 _ 2013 ______(16.9 _ 1927)____________ ___-1.5 _ 1895, 1931__-1.1 _ 1997

26 Oct __ 17.0 _ 2005 ______(16.8 _ 1888)____________ ___-3.6 _ 1887*______-0.3 _ 1997*

27 Oct __ 19.6 _ 2005 ______(18.8 _ 1888)____________ ___-3.9 _ 1931 ______-0.3 _ 1984

28 Oct __ 18.1 _ 2014 ______(17.5 _ 1888)____________ ___-3.8 _ 1895 ______-0.5 _ 1997

29 Oct __ 17.2 _1908*______ 17.1+ _ 2005*__________ ___-3.9 _ 1895*______-3.8 _1997*

30 Oct __ 17.8 _ 2005 ______(17.4 _ 1908)____________ ___-1.9 _ 1895 ______-1.5 _ 1988

31 Oct __ 20.6 _ 2014*______(16.4 _ 1900)*__________ ___-3.2 _ 1881 ______-1.5 _ 1992

_________________________________ Notes:

* 1st _ 25.6 in 1985 was a record until 2011. Also 23.4 in 1959 (not a record).

* 9th _ also 23.0 in 1969 (not a record).

*10th _ 21.2 in 2005 tied 1921, ties broken by 2018.

*13th _ 21.8 in 1990 a record until 2018; also 20.0 in 2001 and 19.2 in 2018 (not records).

*23rd _ 18.6 in 1996 a record until 2011.

*24th _ also 18.0 in 1996 and 17.4 in 2009, 17.1 in 2017 (not records).

__________________________________________________________________ *24th _ -3.0 in 1880 record to 1895. (also -3.0 1926)

__________________________________________________________________ *26th _ also -3.0 in 1892, -3.4 in 1931.

+29th _ V2.0 new record set in 2022, 19.5

__________________________________________________________________ *29th _ also -3.3 in 1911. (and -3.0 2008)

*31st _ 16.6 in 2009, record until 2014. (1772 may have been 17-19) 16.4 in 2015 not a record.

============================================

 

DATE___ High max, year___Recent (or previous) __[]__ Low min, year___Recent (or previous)

01 Nov __ 16.7 _ 2020*______(15.8 _ 1978)*________ ___-3.8 _ 1926 ______-2.3 _ 1988

02 Nov __ 17.7 _ 1927 ______ 17.4 _ 2005 __________ ___-4.0 _ 1880 ______-0.8 _ 2006

03 Nov __ 16.8 _ 2011*______(15.9 _ 1927,35)*_____ ___-2.2 _ 1985______(-1.8 _ 1915)

04 Nov __ 18.7 _ 1946 ______ 16.4 _ 2010 __________ ___-2.4 _ 1901 ______-1.6 _ 1988

05 Nov __ 17.6 _ 1938 ______ 15.0 _ 2003  _________ ___ -3.6 _ 1930 ______-2.7 _ 1988

06 Nov __ 16.2 _ 2015 ______(16.1 _ 1972)__________ ___-3.6 _ 1901 ______-1.9 _ 1995

07 Nov __ 16.1 _ 2015 ______(15.1 _ 1978)__________ ___-2.6 _ 1896 ______ 1.0 _ 1989

08 Nov __ 15.5 _ 1998*______(15.0 _ 1978)*________ ___-4.1 _ 1923 ______ -2.3 _ 2016

09 Nov __ 15.9 _ 1977 ______ 15.4 _ 2015 __________ ___-5.4 _ 1921 ______-1.0 _ 2019

10 Nov __ 16.2 _ 1977 ______ 16.1 _ 2015 __________ ___-4.7 _ 1908 ______-1.7 _ 2001

11 Nov __ 15.3 _ 1938* _____ 15.0 _ 2015* _________ ___-3.0 _ 1921 ______-1.4 _ 1996

12 Nov __ 16.3 _ 1938 ______ 14.7 _ 2011* _________ ___-5.1 _ 1919 ______-1.7 _ 1985

13 Nov __ 16.1 _ 1938 ______ 14.9 _ 2011 __________ ___-4.4 _ 1979*______-4.1 _ 1985*

14 Nov __ 14.8 _ 1994, 2015__(14.7 _ 1938)_________ ___ -4.1 _ 1925 ______ -3.5 _ 1985

15 Nov __ 15.4 _ 2015 ______(15.2 _ 1895)__________ ___-4.7 _ 1965*______-2.3 _ 1983*

16 Nov __ 15.7 _ 1895 ______ 15.5 _ 1997 __________ ___-6.4 _ 1901*______-2.3 _ 2007*

17 Nov __ 14.8 _ 1997*_____ (14.2 _ 1913)* ________ ___-6.1 _ 1901, 30*__-2.5 _ 2005*

18 Nov __ 15.2 _ 1978 ______ 14.5 _ 2003 __________ ___-4.6 _ 1929 ______-3.7 _ 2005

19 Nov __ 15.6 _ 1994 ______(14.6 _ 1948)__________ ___-2.6 _ 2005*______(-2.3 _ 1914)* 

20 Nov __ 15.3 _ 1947 ______ 14.4 _ 1981 __________ ___-3.7 _ 1971 ______-3.6 _ 2005

21 Nov __ 15.7 _ 1947 ______ 14.8 _ 2009 __________ ___-3.9 _ 1880 ______-3.3 _ 2005

22 Nov __ 15.4 _ 1906*______15.0 _ 2017*_________ ___-5.0 _ 1988______(-4.7 _ 1880)

23 Nov __ 14.3 _ 1947 ______ 13.7 _ 1994 __________ ___-6.6 _ 1983*_____(-4.4 _ 1910)*

24 Nov __ 14.0 _ 1980 ______ 13.4 _ 2009 __________ ___-8.8 _ 1904 ______-4.8 _ 1983, 93

25 Nov __ 13.8 _ 1983 ______(13.7 _ 1970)__________ ___-5.6 _ 1952*_____ -1.8 _ 1993*

26 Nov __ 14.5 _ 1979 ______ 13.1 _ 2011 __________ ___-5.1 _ 1989 ______(-4.6 _ 1904)

27 Nov __ 13.6 _ 2000, 06 __(13.2 _ 1917)__________ ___-6.3 _ 1915*______-4.3 _ 1989*

28 Nov __ 14.7 _ 2000*______(13.3 _ 1913)*________ ___-7.0 _ 2010*______(-4.9 _ 1915)*

29 Nov __ 14.0 _ 1939 ______13.6 _ 2000, 18 _______ ___-6.3 _ 2010*_____ (-4.1 _ 1952)*

30 Nov __ 14.3 _ 2001 ______(14.0 _ 1914)__________ ___-5.8 _ 1919 ______-4.5 _ 2016

______________________________ Notes:

* 1st _ 16.1 in 1982, record to 1984 (16.3) record to 2020, also 16.2 in 2009 (not a record).

__________________________________________________________________*13th _ -4.3 in 1921, record until 1979.

* 3rd _ 16.0 in 1994, record to 1996 (16.5) record to 2011. __*15th _ -4.5 in 1929, record until 1965.

* 8th _ 15.4 in 1983, record to 1998. _________________________ *16th _ -5.0 in 1919 (not a record)

* 11th _ These all-time and recent records broken by 15.9 in 2022. 

* 12th _ The recent value for 2011 was broken by 15.1 in 2022 (not an all-time record).

*17th _ also 14.7 in 2015, 14.5 in 2020 (not records). _______ *17th _ -5.0 in 1887, record until 1901. (also -5.0 1915)

__________________________________________________________________ *19th _ -2.4 in 2019, not a record.

*22nd _ also 15.3 in 1947 (not a record). ______________________*23rd _ -5.1 in 1993, not a record.

__________________________________________________________________ *25th _ -5.5 in 1923, record until 1952.

*28th _ also 14.0 in 2018 (not a record). _______________________*27th _ -5.9 in 1923 and -4.6 in 1978, not records.

___________________________________________________________________ *28th _  -4.4 in 1973, not a record.

___________________________________________________________________ *29th _  -4.7 in 1985,  a record until 2010. Also -3.9 1915, 1978

==============================================

DATE___ High max, year___Recent (or previous) __[]__ Low min, year___Recent (or previous)

01 Dec __ 13.8 _ 1985*_____(13.4 _ 1939)*___________ ___-6.4 _ 1947 ______-3.6 _ 2010

02 Dec __ 14.4 _ 1985 ______(14.2 _ 1954)* __________ ___-7.1 _ 1879 ______-3.1 _ 2010

03 Dec __ 13.7 _ 1953 ______13.5 _ 1986 _____________ ___-7.5 _ 1879, 2010 ___ (tied)

04 Dec __ 13.8 _ 1888, 1979 _13.7 _ 1986 _____________ ___-6.7 _ 2010______(-6.1 _ 1879)

05 Dec __ 13.9 _ 1898 ______13.0 _ 2007, 15 _________ ___-7.8 _ 1879 ______-2.4 _ 2010

06 Dec __ 14.0 _ 2007 ______(13.8 _ 1898) ____________ ___-8.1 _ 1879*______-5.8 _ 2010*

07 Dec __ 14.0 _ 2015*______(13.4 _ 1957)*__________ __ -11.4 _ 1879 ______-6.5 _ 2010

08 Dec __ 13.8 _ 1964 ______ 13.3 _ 2016 _____________ ___-7.5 _ 1879 ______-6.8 _ 2010

09 Dec __ 13.5 _ 2016*______(12.5 _ 1979)*___________ ___-5.6 _ 1967 ______-4.7 _ 2010

10 Dec __ 14.4 _ 1994 ______(14.1 _ 1978)_____________ ___-6.8 _ 1981______(-6.0 _ 1878)

11 Dec __ 14.5 _ 1994 ______(13.5 _ 1978)_____________ ___-6.7 _ 1879*_____ -6.2 _ 1991*

12 Dec __ 13.9 _ 1994 ______(13.1 _ 1964) ____________ __-13.2 _ 1981*_____(-6.3 _ 1882)*

13 Dec __ 13.5 _ 1972 ______ 13.4 _ 1998 _____________ __-15.9 _ 1981______(-8.2 _ 1920)

14 Dec __ 13.9 _ 1912 ______ 13.8 _ 1998 _____________ ___ -8.4 _ 1890*______-7.1 _ 1981*

15 Dec __ 13.2 _ 2015*______(12.6 _ 1962)*___________ ___ -8.4 _ 1878^______-3.6 _ 1994

16 Dec __ 13.9 _ 2015 ______(13.0 _ 1897) ____________ ___ -5.5 _ 1899^______ -4.4 _ 1981

17 Dec __ 14.1 _ 2015* ______(13.1 _ 1965)*__________ ___ -7.3 _ 1878 ______ -4.9 _ 1981^

18 Dec __ 15.1 _ 2015*______(12.5 _ 1898)*__________ ___ -7.2 _ 1981*______ (-5.6 _ 1886)*

19 Dec __ 15.3 _ 2015*______(12.1 1932, 57)*________ __ -10.3 _ 2010*______(-6.6 _ 1927)*

20 Dec __ 13.9 _ 1971*______ 12.4 _ 1989*___________ __ -12.4 _ 2010*______(-7.2 _ 1886)*

21 Dec __ 13.7 _ 2015 ______(13.2 _ 1971) ____________ __-10.6 _ 2010_____ (-8.2_1909, 46)

22 Dec __ 13.8 _ 2015*______(12.1 _ 1967)*___________ __-12.6 _ 1890 ______ -4.5 _ 2010

23 Dec __ 14.7 _ 1977 ______ 12.6 _ 1991 _____________ ___-8.4 _ 1935 ______ -5.9 _ 1981

24 Dec __ 13.0 _ 1997*______ (11.9 _ 1937)*__________ ___-9.8 _ 1878 ____ -5.3 _ 1981, 2010

25 Dec __ 13.1 _ 2015, 16 ___ (12.9 _ 1900)___________ __-11.2 _ 1878 ______ -9.2 _ 2010

26 Dec __ 13.8 _ 2015*______(11.8 _ 1898)*__________ ___ -9.7 _ 2010 ______(-8.0 _ 1962)

27 Dec __ 13.9 _ 1974 ______ 13.3 _ 2015 ____________ ___ -9.1 _ 1892*______ -6.7 _ 2010*

28 Dec __ 14.3 _ 1974 ______ 13.5 _ 1994 ____________ ___ -8.1 _ 1892 ______ -6.4 _ 1985

29 Dec __ 13.8 _ 1925,2021*_ tied records _________ ____ -9.2 _ 1964*______-7.9 _ 1995*

30 Dec __ 13.9 _ 2021*______(12.2 _ 1901)*__________ __ -10.7 _ 1908 ______ -6.6 _ 1985

31 Dec __ 14.0 _ 2021 ______ (12.4 _ 1920) ___________ ___ -6.4 _ 1892 ______ -4.3 _ 2000

_________________________ Notes:

^ 15th new low min of -9.3 in v2.0 (the 1878 record shown is CET legacy, the v2.0 record was -8.3 (1878)

^ 16th new low min of -8.0 in v2.0 (the 1899 record shown is CET legacy, the v2.0 record was -5.6 (1899)

^ 17th new recent low min of -6.6 in v2.0 (the 1981 recent mark is CET legacy, the v2.0 value is -5.1 (1981)

* 1st _ 13.4 in 2015 (not a record). ________________ __________ * 6th _ -6.8 in 1962, not a record. 

* 7th _ 13.6 in 2016 (not a record).

* 9th _ 12.7 in 1997 a record until 2016. ___________________ *11th _also -6.6 in 1882 and -5.1 in 1981, not records.

*12th _ 13.2 in 2003 (not a record). _________________________*12th _ also -7.4 in 1991 and -6.2 2017 (not records) 

*15th _ 13.1 in 1982 record until 2015, 12.6 in 1985 and 13.0 in 2013 (not records).

*17th _ 13.6 in 1987, record until 2015 _____________________ *14th _ also -8.1 in 1899 (not a record). 

*18th _ 12.5 in 1991, tied record to 13.6 in 1993, record to 2015; also 13.3 in 2014 (not a record).

______________________________________________________________ *18th _ also -4.4 in 2005, -4.9 in 2010 (not records).

*19th _ 12.4 in 1991, record until 13.3 in 1993, record until 2015; also 12.1 in 2019.

______________________________________________________________ *19th _ -8.9 1981 record to 2010, also -6.1 in 2009, -5.7 in 1917.

*20th _ 13.3 in 1900 record to 1971;  13.0 1957 (not record). __ *20th _also -6.6 in 1890, -6.8 1981 and -6.9 1999 (not records).

________________________________________________________________*21st _ also -7.2 in 1890 (record broken 1909).

*22nd _ 13.2 in 1991, record until 2015; also 12.7 in 2012, 12.3 in 2014.

*24th _ 12.4 in 1983, record until 1997. Also 12.6 in 2002, 12.1 in 1988, 12.2 in 1999.

*26th _ 13.0 in 1988, record until 2015. Also 12.4 in 2011, 12.1 in 1998 and 12.0 in 1990.

*29th _ also 13.1 in 1987, 2006, 2015. ___________________________*29th _ also -7.3 in 1985 (not a recent min).

*30th _ 12.3 in 2004, record until 2015. 13.5 in 2015 record to 2021. Also 12.3 in 2017 (not a record). 

 

Edited December 18, 2022 by Roger J Smith

[Roger J Smith]

I can now add tables of the low maximum and high minimum CET record values 1878 to present ... for these, I only searched the data base for the one extreme value whenever it occurred, there is no division of data into all-time and since-1981 records. In the case of the high minima, a lot of them are from the past two or three decades, more so than the slower increase in high maxima. I have tables of annual frequencies of low maxima and high minima to share also. 

For the time being I will just post the extremes without any near-miss data in notes. 

First post will be the low maxima, arranged in two groups (Jan to June and July to Dec). 

For anyone unfamiliar with the term, low maximum is basically the coldest daytime or maximum daily temperature although in the winter mainly, some of these values may have occurred at night and the days may have become even colder than these values. 

LOW MAXIMUM RECORD VALUES (CET) 1878 to PRESENT TIME

(updated after each month ends and not instantly as I wait for the finalized data to be posted then __

__ monthly extremes in bold type)

 

DATE ___ JANUARY __ FEBRUARY __ MARCH _____ APRIL _____ MAY ________ JUNE ____

_ 01 ____ -1.1 _ 1962 ____ -3.8 _ 1956 ____ -1.2 _ 2018 ___ 3.1 _ 1917 ___ 6.7 _ 1979 ___10.4_ 1964

_ 02 ____ -1.8 _ 1893 ____ -2.9 _ 1956 _____ 0.0 _ 1892 ___ 3.3 _ 1968 ___ 8.1 _ 1979 ___10.6_ 1964

_ 03 ____ -0.9 _ 1941 ____ -0.3 _ 1956 ____ -0.1 _ 1982 ___ 3.1 _ 1922 ___ 6.0 _ 1892 ___10.5_ 1923

_ 04 ____ -2.1 _ 1894 ____ -3.0 _ 1912 _____ 0.5 _ 1965 ___ 5.0 _ 1911 ___ 8.5 _ 1979 ___12.3_1923,32,94

_ 05 ____ -4.2 _ 1894 ____ -0.6 _ 1912 _____ 0.3 _ 1947 ___ 2.3 _ 1911 ___ 8.4 _ 1979 ___12.6_ 1888

_ 06 ____ -3.0 _ 1894 ____ -4.5 _ 1895 ____ -0.7 _ 1942 ___ 4.1 _ 1911 ___ 8.6 _ 1932 ___10.8_ 1905

_ 07 ____ -2.6 _ 1894 ____ -2.7 _ 1895 _____ 0.9 _ 1931 ___ 4.1 _ 1986 ___ 6.7 _ 1879 ___11.4_ 1891

_ 08 ____ -2.1 _ 1982 ____ -3.0 _ 1895 _____ 0.6 _ 1917 ___ 4.9 _ 1986 ___ 8.1 _ 1904 ___10.1_ 1897

_ 09 ____ -2.5 _ 1982 ____ -1.8 _ 1895 _____ 0.7 _ 1931 ___6.0 _1891,1917_ 8.3 _ 1883 ___11.8_ 1902

_ 10 ____ -2.3 _ 1982 ____ -2.7 _ 1985 _____ 0.9 _ 1891 ___ 4.1 _ 1978 ___ 8.6 _ 1883 ___11.4_ 1977

_ 11 ____ -3.3 _ 1987 ___ -1.6 _ 1947,85___ 0.5 _  1928 ___ 5.4 _ 1879 ___ 9.0 _ 1886 ___11.7_ 2019

_ 12 ____ -5.7 _ 1987 ____ -2.9 _ 1929 _____ 1.0 _ 1928 ___ 3.7 _ 1879 ___ 8.7 _ 1897 ___12.6_ 1892

_ 13 ____ -3.5 _ 1987 ____ -3.4 _ 1929 _____ 2.4 _ 1888 ___ 3.7 _ 1892 ___ 6.7 _ 1915 ___12.1_ 1903

_ 14 ____ -4.4 _ 1881 ____ -1.6 _ 1929 _____ 1.9 _ 1947 ___ 2.3 _ 1966 ___ 9.1 _ 1935 ___10.1_ 1903

_ 15 ____ -2.7 _ 1881 ____ -3.9 _ 1929 _____ 1.4 _ 1887 ___ 3.3 _ 1966 ___ 9.3 _ 1879 ___12.3_ 1923

_ 16 ____ -3.0 _ 1985 ____ -1.2 _ 1947 _____ 0.9 _ 1979 ___ 4.6 _ 1966 ___ 7.9 _ 1935 ___12.1_ 1923

_ 17 ____ -2.1 _ 1940 ____ -2.3 _ 1947 ____ 1.5 _ 1888,2018 _ 5.3 _ 1966 __ 8.5 _ 1995 ___12.6_ 1977

_ 18 ____ -1.3 _ 1881 ____ -0.8 _ 1947 _____ 0.7 _ 2018 ___ 6.0 _ 1918 ___ 9.4 _ 1996 ___12.2_ 1977

_ 19 ____ -2.9 _ 1881 ____ -0.6 _ 1892 _____ 1.6 _ 1888 ___ 5.1 _ 1881 ___ 9.7 _ 1894 ___12.2_ 1903

_ 20 ____ -3.8 _ 1940 ____ -0.7 _ 1947 _____ 2.8 _ 1888 ___ 5.9 _ 1881 ___ 8.8 _ 1907 ___12.2_ 1903

_ 21 ____ -3.2 _ 1881 ____ -2.1 _ 1947 _____ 2.4 _ 1883 ___ 6.4 _ 1918 ___ 9.5 _ 1891 ___14.5_ 1972

_ 22 ____ -1.8 _ 1963 ____ -0.8 _ 1947 _____ 1.9 _ 1883 ___ 7.6 _ 1936 ___ 9.9 _ 1954 ___14.8_ 1980

_ 23 ____ -3.6 _ 1963 _____ 0.0 _ 1947 _____ 0.8 _ 2013 ___ 4.3 _ 1908 ___ 8.3 _ 1948 ___13.5_ 1978

_ 24 ____ -3.6 _ 1963 ____ -0.6 _ 1956 _____ 0.4 _ 1879 ___ 4.0 _ 1908 ___10.0_ 1891 ___13.1_ 1939

_ 25 ____ -4.0 _ 1881 _____ 0.0 _ 1986 _____ 0.1 _ 1879 ___ 5.0 _ 1908 ___ 9.8 _ 1899 ___12.3_ 1909

_ 26 ____ -4.5 _ 1945 ____ -1.3 _ 1929 _____ 1.1 _ 1879 ___ 6.1 _ 1981 ___ 8.8 _ 1962 ___12.0_ 1997

_ 27 ___-0.8 _ 1945,54___ -1.5 _ 1929 _____ 3.0 _ 2013 ___ 5.7 _ 1919 ___ 9.5 _ 1984 ___12.8_ 1974

_ 28 ___-1.1 _1895,1954___ -1.3 _ 2018 _____ 2.8 _ 1952 ___7.7 _1892,1919 _10.5_ 1983___13.8_ 2017

_ 29 ____ -3.8 _ 1947 _____ 0.1 _ 1904 _____ 2.1 _ 1952 ___ 7.6 _ 1945 ___11.3_ 1887 ___14.1_ 1906

_ 30 ____ -1.4 _ 1947 ___ ____ ___ ____ ______ 3.4 _ 1952 ___ 6.7 _ 1945 ___11.2_ 1975 ___13.7_ 1919

_ 31 ____ -1.9 _ 1954 ___ ____ ___ ____ ______ 3.3 _ 1922 ___ ___ _ _____ ____11.3_ 1923 ___ ____ _ ______

---------------- ======================================================== --------------

 

DATE___ JULY ________ AUGUST ______SEPTEMBER _OCTOBER _NOVEMBER _DECEMBER

_ 01 ____  13.9 _ 1919 ____ 14.9 _ 1917 ____13.3 _ 1881 ___10.3_ 1888___ 3.3 _ 1881 ___-0.4 _ 2010

_ 02 ____ 14.7 _ 1912 ____ 14.2 _ 1912 ____13.5 _ 1915 ___ 7.9 _ 1888 ___ 5.0 _ 1880 ___-1.2 _ 1879

_ 03 ____ 13.5 _ 1907 ____ 14.9 _ 1986 ____11.7 _ 1908 ___ 8.5 _ 1923 ___ 5.1 _ 1922 ___-0.4 _ 1879

_ 04 ____ 15.0 _ 1879 ____ 15.0 _ 1920 ____12.2 _ 1908 ___ 8.4 _ 1880 ___ 3.4 _ 1919 ___-1.5 _ 1925

_ 05 ____ 12.5 _ 1920 ____ 15.0 _ 1941 ____12.7 _ 1931 ___ 9.6 _ 1888 ___ 3.0 _ 1901 ___-0.6 _ 1902

_ 06 ____ 13.7 _ 1888 ____ 15.2 _ 1977 ____13.0 _ 1952 ___ 8.6 _ 1888 ___ 5.8 _ 1901 ___-1.8 _ 2010

_ 07 ____ 13.7 _ 1888 ____ 14.6 _ 1898 ____12.5 _ 1952 ___ 9.9 _ 1904 ___ 3.6 _ 1888 ___-0.4 _ 2010

_ 08 ____ 14.3 _ 1907 ____ 13.6 _ 1902 ____12.3 _ 1909 ___10.1_ 1892 ___ 3.4 _ 1921 ___-0.7 _ 1967

_ 09 ____ 13.9 _ 1879 ____ 13.7 _ 1900 ____12.5 _ 1952 ___ 8.8 _ 1887 ___ 4.5_1919,21 __ 0.8 _ 1981

_ 10 ____ 15.0 _1907,93 __15.6 _ 1892 ____12.9 _ 1912 ___ 8.2 _ 1980 ___ 3.8 _ 1919 ___-1.2 _ 1981

_ 11 ____ 13.7 _ 1888 ____ 15.1 _ 1960 ____11.4 _  1912 ___ 6.0 _ 1896 ___ 3.1 _ 1919 ___-0.8 _ 1882

_ 12 ____ 13.4 _ 1879 ____ 13.9 _ 1881 ____13.1 _ 1948 ___ 7.4 _ 1887 ___ 2.4 _ 1919 ___-3.8 _ 1981

_ 13 ____ 14.6 _ 1956 ____ 13.5 _ 1881 ____12.6 _ 1909 ___ 8.0 _ 1971 ___ 1.4 _ 1919 ___-1.9 _ 1920

_ 14 ____ 14.8 _ 1892 ____  14.1 _ 1912 ____12.0 _ 1975 ___ 8.8 _ 1925 ___ 1.7 _ 1919 ___-2.2 _ 1878

_ 15 ____ 14.5 _ 1888 ____ 14.5 _ 1957 ____11.4 _ 1994 ___ 7.6 _ 1879 ___ 0.5 _ 1965 ___-0.3_ 1890

_ 16 ____ 14.9 _ 1915,22 __12.0 _ 1888____13.0 _ 1976 ___7.8 _1905,80__0.6 _1901 ___-0.3 _ 1890

_ 17 ____ 12.9 _ 1892 ____ 14.2 _ 1888 ____11.8 _ 2013 ___ 7.7 _ 1905 ___ 2.7 _ 1930 ___-0.5 _ 1981

_ 18 ____ 13.6 _ 1892 ____ 14.8 _ 1952 ____11.1 _ 1952 ___ 7.8 _ 1926 ___ 0.7 _ 1887 ___-1.3 _ 1927

_ 19 ____ 14.0 _ 1892 ____ 14.5 _ 1954 ____12.1 _ 1912 ___ 6.9 _ 1896 ___ 2.0 _ 1902 ___-3.2 _ 2010

_ 20 ____ 14.9 _ 1902 ____ 14.6 _ 1903 ____11.6 _ 1977 ___ 5.4 _ 1880 ___ 2.5 _ 1962 ___-2.2 _ 1938

_ 21 ____ 13.5 _ 1902 ____ 14.7 _ 1944 ____11.5 _ 1948 ___ 6.3 _ 1926 ___ 1.1 _ 1880 ___-1.5 _ 1891

_ 22 ____ 13.6 _ 1930 ____ 14.3 _ 1904 ____11.8 _ 1948 ___ 5.7 _ 1895 ___ 2.1 _1880,1920__-1.5 _ 1891

_ 23 ____ 13.8 _ 1930 ____ 14.5 _ 1979 ____11.0 _ 1893 ___ 6.2 _ 1895 ___-0.5 _ 1993 ___-2.7 _ 1891

_ 24 ____ 14.9 _ 1981 ____ 13.8 _ 1931 ____11.9 _ 1889 __ 6.2 _ 1895,1926__-0.3_1904 ___-1.8 _ 1891

_ 25 ____ 14.9 _ 1920 ____  14.3 _ 1956 ___ 12.2 _1885,88__5.9 _ 1892 ___ 2.3 _ 2010 ___-2.6 _ 2010

_ 26 ____ 14.9 _ 1920 ____ 12.3 _ 1912 ____10.7 _ 1926 ___ 5.9 _1880,95__1.2 _ 1904 ___-0.8 _ 1906

_ 27 ____ 14.9 _ 1886 ____ 13.8 _ 1885 _____ 9.8 _ 1974 ___ 5.4 _ 1895 ___-0.3 _ 1890 ___-0.9 _ 1899

_ 28 ____ 15.3 _ 1888 ____ 14.1 _ 1888 ____11.1 _ 1974 ___ 5.6 _ 1895 ___-1.0 _ 2010 ___-3.0 _ 1995

_ 29 ____ 15.2 _ 1898 ____ 12.5 _ 1919 _____ 8.3 _ 1918 ___ 4.6 _ 1895 ___ 0.0 _ 1890 ___-4.0 _ 1908

_ 30 ____15.4 _1898, 1965 __14.1 _ 1885 ____10.1 _ 1918 __ 5.6 _ 1881 ___ 0.4 _ 1973 ___-1.7 _ 1890

_ 31 ____ 13.8 _ 1912 ____ 13.2 _ 1881  ____ ___ ____ _______ 3.1 _ 1934 ___ ___ _ _____ ____-2.4 _ 1978 

---------------- ======================================================== --------------

(table of high minima to follow) 

Edited August 23, 2022 by Roger J Smith

[Roger J Smith]

Daily CET high minimum record values 1878-present

These tables list the highest daily minimum values for the CET data (1878-present). This is usually the overnight low but in winter temperatures can vary more by air mass than time of day in mobile Atlantic driven patterns in particular, so a day will need to stay mild through the daytime and evening hours to preserve a very mild overnight reading. This does not always happen so that some nights may have been milder still than these record values. This detail fades out in the warmer part of the year when the daily minimum is almost always the morning low. 

A study of these daily high minima reveals that 55 out of 366 occurred with the same day's high daily maximum (already listed). Those 55 days would automatically set the high daily mean also. In addition to those, 41 other cases were found when the closest association was that the record high minimum was the day after a record high maximum. If that was not the case, a few additional cases happened either one day prior to the record high maximum, or two days afterwards. Also about the same numbers had these attributes relative to a "secondary high max" in the table which would be either the record broken since 1980, a record after 1980 since broken, or the highest value after 1980 but not the absolute maximum. In general then, about half the record high minima occur in conjunction with a record or near-record high maximum. However, some can happen with a more subdued daytime high, in situations of cloud and frequent precipitation in the winter half year. Days less likely to see the association are the earlier portions of long warm spells. These tend to have clear skies and the nights, while mild or warm, are not quite warm enough to set records. The long heat wave in June-July 1976 only set two record high minima (4 and 5 July). The warm spell of late Sept 1895, and of Sep-Oct 2011, had similar outcomes with just one record high minimum late in the spell. 

Monthly extreme values are shown in bold type.

As noted earlier, this data set terminated 1 May 2022, and any new records in v2.0 can be found in the linked thread (see the start of daily high max and low min records previously for the link). These new values are not listed here. 

The data are arranged in two parts, January to June, and July to December: 

 

DATE __ JANUARY ___FEBRUARY __ MARCH _____ APRIL ______ MAY ________ JUNE ___

__ 01 ____10.9 _ 2022 ____ 9.8 _ 1923 ____ 8.9 __ 1878 ___ 10.2 __ 2011 ___ 12.1 __ 2005 ___ 15.3 __ 1947

__ 02 ____ 8.9 _ 1921 ___ 10.3 _ 1923 ____ 8.9 __ 1999 ___ 11.3 __ 2011 ___ 10.3 __ 2005 ___ 14.6 __ 1947

__ 03 ___ 10.5 _ 1932 ____ 9.7 _ 2004 ____ 8.4 __ 1979 ____ 9.9 __ 1985 ___ 10.5 __ 2005 ___ 16.4 __ 1947

__ 04 ____ 9.7 _ 1932 ___ 10.8 _ 2004 ____ 8.1 __ 1977 ___ 11.9 __ 1926 ___ 12.5 __ 2008 ___ 14.9 __ 1947

__ 05 ____ 9.5 _ 1957 ___ 10.5 _ 2004 ____ 7.8 __ 1880 ___ 10.4 __ 1999 ___ 11.0 __ 2008 ___ 15.9 __ 1980

__ 06 ____ 9.2 _ 1983 ____ 8.8 _ 2011 ____ 9.4 __ 1989 ___ 10.5 __ 2014 ___ 11.1 __ 1962 ___ 15.2 __ 1982

__ 07 ____ 8.8 _ 1890 ____ 8.7 _ 1989 ____8.6 _1926,2002 __ 9.4 __ 2014 ___ 12.3 __ 2011 ___ 14.7 __ 1950

__ 08 ____ 8.2 _ 1890 ___ 10.1 _ 1903 ___ 10.0 __ 2000 ____ 9.7 __ 1937 ___ 13.5 __ 2011 ___ 15.1 __ 1983

__ 09 ____ 8.2 _1957,71__ 9.4 _ 1903 ___ 10.3 __ 2000 ____ 9.4 __ 1999 ___ 14.2 __ 1945 ___ 14.8 __ 1982

__ 10 ___ 10.4 _ 1921 ____ 9.4 _ 1899 ____ 9.9 __ 1957 ___ 10.9 __1928,37__13.1 __ 2016 ___ 14.9 __ 1993

__ 11 ____ 8.8 _ 1990 ____ 9.1 _ 1939 ___ 10.1 __ 1981 ___ 11.6 __ 1981 ___ 12.5 __ 2016 ___ 15.9 __ 2006

__ 12 ____ 8.4 _ 1976 ____ 8.8 _ 2002 ____ 8.5 __ 2017 ___ 10.1 __ 1949 ___ 13.0 __ 1959 ___ 15.8 __ 2006

__ 13 ____ 8.8 _ 2007 ____ 7.6 _ 1998 ____ 9.0 __ 1961 ___ 10.2 __ 1939 ___ 14.1 __ 1945 ___ 15.2 __ 1989

__ 14 ____ 9.5 _ 2011 ____ 7.7 _ 1882 ____ 8.3 __ 1912 ___ 10.5 __ 1905 ___ 11.8 _ 1969,92__ 13.7 __ 1951

__ 15 ____ 8.3 _ 1968 ___ 10.0 _ 1958 ____ 8.8 __ 1957 ___ 11.9 __ 1945 ___ 13.2 __ 2000 ___ 14.3 __ 2004

__ 16 ____ 9.8 _ 1990 ____ 9.4 _ 1928 ____ 9.6 __ 2004 ___ 11.8 __ 1945 ___ 12.2*__ 2017 ___ 14.7 __ 1896

__ 17 ____ 9.3 _ 1908 ____ 8.1 _ 1911 ___ 10.4 __ 2005 ____ 9.7 __ 2018 ___ 12.7 __ 2002 ___ 14.9 __ 1896

__ 18 ____ 8.0 _ 1920 ____ 9.0 _ 1911 ____ 9.4 __ 1898 ___ 11.6 __ 2018 ___ 13.1 __ 1997 ___ 15.1 __ 1930

__ 19 ____ 9.9 _ 1932 ____8.4 _1945,89___ 9.5__ 2017 ___ 11.0 __ 2018 ___ 13.1 __ 1888 ___ 15.2 __2000,05

__ 20 ____ 9.9 _ 1898 ____ 9.7 _ 1990 ____ 9.3 __ 2017 ____ 9.8 __ 1893 ___ 12.1 __ 2014 ___ 15.8 __ 2005

__ 21 ____ 9.6 _ 1898 ____ 8.5 _ 2021 ____ 9.5 __ 1931 ____ 9.9__1895,1963__12.1 __1916 ___ 16.0 __ 1936

__ 22 ____ 8.7 _ 1969 ____ 8.6 _ 1953 ___ 10.4 __ 1927 ___ 11.1 __ 2018 ___ 13.5 __ 2020 ___ 17.2 __ 1941

__ 23 ____ 9.2 _ 1960 ____ 8.8 _ 1918 ____ 9.2 __ 1936 ____ 9.9 __ 1993 ___ 13.0 __ 1953 ___ 15.6 __ 1935

__ 24 ____ 8.2 _ 2018 ____ 9.5 _ 1922 ____ 9.0 __ 2005 ___ 12.3 __ 2007 ___ 13.1 __ 2007 ___ 16.0 __ 1935

__ 25 ____ 9.7 _ 2016 ____ 8.0 _ 1900 ____ 9.9 __ 1981 ___ 12.2 __ 2007 ___ 14.3 __ 1953 ___ 16.6 __ 1935

__ 26 ____ 8.4 _ 1903 ____ 9.9 _ 1882 ____ 9.7 __ 2006 ___ 10.3 __ 1930 ___ 12.9 __ 2019 ___ 16.2 __ 2020

__ 27 ____ 8.4 _ 2016 ____ 9.0 _ 1945 ___ 10.9 __ 2006 ___ 11.1 __ 1928 ___13.6__1892,2017___16.0__1878,2011

__ 28 ____ 8.8 _ 1958 ____ 8.6 _ 1912 ____ 9.1 __ 1981 ___ 12.1 __ 1994 ___ 14.1 __ 2001 ___ 16.0 __ 1878

__ 29 ____ 9.0 _ 1921 ____ 8.5 _ 1960 ____ 9.8 __ 1945 ___ 10.1*__ 1963*___13.4 __ 1928 ___ 16.5 __ 1987

__ 30 ____ 8.5 _ 1923 ___ ____ _ _____ ____11.2 __ 1998 ___ 10.4 __ 1987 ___ 14.6 __ 1944 ___ 16.4 __ 1952

__ 31 ____ 8.9 _ 2000 ___ ____ _ _____ ____10.7 __ 2017 ___ _____ __ _____ ___ 14.1 __ 1895 ___ _____ __ _____

* One or more dates in late April 1775 may have exceeded these and even the monthly extreme, based

on their considerably higher mean daily values near 20 C for the 29th. 13-14 C seems plausible.

The same possibility exists for mid-May 1833. 

---------------------- ========================================================= ----------------

 

DATE __ JULY _______ AUGUST ____SEPTEMBER __ OCTOBER __ NOVEMBER __ DECEMBER

__ 01 ___ 17.1 _ 1968 ___ 17.9 _ 1995 ___ 16.4 __ 1984 ___ 14.8 __ 1985 ___ 12.0 __ 1894 ___ 10.6 __ 1939

__ 02 ___ 16.9 _ 1952 ___ 17.8 _ 1995 ___ 16.3 __ 1939 ___ 13.8 __ 1954 ___ 12.5 __ 1894 ____ 9.9 __ 1985

__ 03 ___ 16.5 _ 1999 ___ 16.5 _1933,95__16.5 __ 1939 ___ 15.4 __ 2011 ___ 13.5 __ 1996 ___ 11.2 __ 1985

__ 04 ___ 18.0 _ 1976 ___ 17.2 _ 1904 ___ 14.7 __ 1973 ___ 15.0 __ 2013 ___ 12.8 __ 1931 ___ 10.6 __ 1934

__ 05 ___ 16.4 _ 1976 ___ 18.5 _ 1975 ___ 18.4 __ 1949 ___ 14.1 __ 1886 ___ 13.2 __ 1938 ___ 11.3 __ 1898

__ 06 __16.7 _1991,2001_16.5 _ 2003 ___16.1__1898,1958__13.8 __ 1990 ___12.3 __ 2015 ___ 10.8 __ 1898

__ 07 ___ 16.7 _ 1989 ___ 16.3 _ 2016 ___ 16.2 __ 2016 ___ 13.8 __ 1878 ___ 11.4__1972,2015___ 9.5 __ 1964

__ 08 ___ 16.4 _ 1893 ___ 16.6 _ 1938 ___ 15.9 __ 2009 ___ 13.2 __ 1969 ___ 10.4 __ 1938 ___ 10.6 __ 2015

__ 09 ___ 16.4 _ 1999 ___ 18.5 _ 2004 ___ 15.4 __ 2021 ___ 14.7 __ 1967 ___ 10.7 __ 1994 ___ 11.2 __ 1934

__ 10 ___ 16.1 _ 1923 ___ 16.4 _ 2003 ___ 15.9 __ 2011 ___ 14.4 __1921,2011__10.6__ 1977 ____ 9.7 __ 2016

__ 11 ___ 16.8 _ 1923 ___ 18.8 _ 1997 ___ 15.8 __ 2021 ___ 14.2 __ 2011 ___ 12.7 __ 2015 ___ 10.8 __ 1994

__ 12 ___ 17.0 _ 1926 ___ 18.2 _ 2020 ___ 17.3 __ 1945 ___ 15.2 __ 2005 ___ 12.4 __ 1947 ___ 11.9 __ 1994

__ 13 ___ 17.9 _ 1941 ___ 17.7 _ 2020 ___ 15.9 __ 2006 ___ 15.1 __ 2018 ___ 13.1 __ 1938 ___ 10.8 __ 1994

__ 14 ___ 16.5 _ 1975 ___ 16.4 _ 2001 ___ 16.1 __ 2016 ___ 15.2 __ 2017 ___ 12.1 __ 1938 ___ 10.5 __ 2006

__ 15 ___ 16.8 _ 1926 __15.8_1893,2012,13__14.6 __1932 ___ 14.2 __ 1893 ___ 11.3 __ 1948 ____ 9.8 __ 1985

__ 16 ___ 16.8 _ 2003 ___ 15.4 _ 1909 ___ 16.1 __ 1961 ___ 13.1 __ 1954 ___ 11.4 __ 1997 ____ 9.1 __ 1985

__ 17 ___ 16.2 _ 2003 ___ 15.9 _ 2012 ___ 15.4 __ 1926 ___ 13.0 __ 1897 ___ 11.3 __ 1997 ___ 11.0 __ 2015

__ 18 ___ 15.9 _ 1937 ___ 16.4 _ 1944 ___ 14.9 __ 1945 ___ 14.7 __ 2014 ___ 11.3 __ 2020 ___ 10.5 __ 1932

__ 19 ___ 17.6 _ 1995 ___ 17.0 _ 1955 ___ 14.8 __ 2014 ___ 14.1 __ 2014 ___ 12.0 __ 1978 ___ 10.8 __ 2015

__ 20 ___ 19.4 _ 2016 ___ 16.4 _1932,97__15.9 __ 1947 ___ 12.2 __ 1941 ___ 12.0 __ 1994 ____ 9.6 __ 2015

__ 21 ___ 15.8 _ 2006 ___ 16.5 _ 1997 ___ 15.7 __ 2006 ___ 13.1 __ 2020 ___ 11.7 __ 1947 ____ 9.6 __ 1971

__ 22 ___ 17.0 _ 2006 ___ 16.5 _ 1997 ___ 14.8 __ 1989 ___ 13.7 __ 1906 ___ 13.5 __ 1947 ___ 10.0 __ 1991

__ 23 ___ 17.7 _ 1925 ___ 16.3 _ 1997 ___ 15.1 __ 1956 ___ 12.8 __ 1998 ___ 12.3 __ 1947 ___ 11.1 __ 1991

__ 24 ___ 17.7 _ 2019 ___ 16.4 _ 2003 ___ 14.9 __ 2006 ___ 11.6 __ 2012 ___ 11.4 __ 1980 ____ 8.7 __ 2002

__ 25 ___ 16.2 _ 2019 ___ 16.4 _1959,95__ 14.6__ 1895 ___ 12.1 __ 1978 ___ 11.1 __ 1964 ____ 9.3 __ 1983

__ 26 ___ 17.8 _ 2006 ___ 15.8 _ 2000 ___ 14.1 __ 1976 ___ 13.3 __ 1927 ___ 11.3 __ 1983 ____ 9.7 __ 2011

__ 27 ___ 17.2 _ 1949 ___ 15.9 _ 1911 ___ 14.2 __1913,41__14.6 __ 1888 ____ 9.0 __ 1994 ____ 8.7 __ 1949

__ 28 ___ 17.0 _ 1947 ___ 16.2 _ 1942 ___ 15.0 __ 1948 ___ 13.7 __ 1888 ___ 10.2 __ 1917 ___ 10.2 __ 1987

__ 29 ___ 18.8 _ 1948 ___ 16.5 _ 1942 ___ 15.7 __ 1908 ___ 13.2 __ 1935 ___ 10.6 __ 2000 ___ 10.9 __ 1987

__ 30 ___ 17.5 _ 1911 ___ 16.4 _ 2008 ___ 14.8 __ 1908 ___ 13.2 __ 2005 ___ 10.8 __ 1939 ____ 9.1 __ 1925

__ 31 ___ 16.5 _ 1995 ___ 17.1 _ 1984 ___ _____ __ _____ ___ 13.1 __ 2014 ___ _____ __ _____ ___11.8 __ 2021

=================================================================================

11.8 on 31 Dec 2021 replaced 9.6 from 1901.

Frequency tables will be posted next for these last two sets of record low maxima and high minima. 

(note new records were set on several dates in July and August 2022 also Sep 2022 and 2023; see linked thread for details)

 

Edited September 8, 2023 by Roger J Smith
recent values added

[Roger J Smith]

FREQUENCY OF LOW MAXIMA (CET 1878 to 2021)

Year ending ___ 0 ___1 ___ 2 ___3 ___ 4 ___5 ___ 6 ___ 7 ___8 ___ 9 ____ total (adjusted)

1870s _______ -- ___ -- __ -- ___ -- ___ -- ___ -- ___ -- ___ -- __ 1.0 _ 13.0___14.0 (70.0)

1880s _______ 5.0 _14.0 _1.0 _ 4.0 _ 1.0 _ 2.5 _ 2.0 _ 5.0 _18.5 _ 1.0 ___ 54.0

1890s _______ 5.0 _ 8.5 _12.5 _2.0 _ 5.0 _10.5 _ 2.0 _ 2.0 _ 2.0 _ 2.0 ___ 51.5

1900s _______ 1.0 _ 3.0 _ 6.0 _ 6.0 _ 6.0 _ 2.5 _ 2.0 _ 3.5 _ 6.0 _ 3.0 ____ 39.0

1910s _______ 0.0 _ 3.0 _10.0_ 0.0 _ 0.0 _ 2.5 _ 0.0 _ 3.5 _ 4.0 _11.0____ 34.0

1920s _______ 5.5 _ 1.5 _ 3.5 _3.33 _0.0 _ 2.0 _ 3.5 _ 1.0 _ 2.0 _ 6.0 ____ 28.33

1930s _______ 3.0 _ 4.0 _1.33 _0.0 _ 1.0 _ 2.0 _ 2.0 _ 0.0 _ 1.0 _ 1.0 ____ 15.33

1940s _______ 2.0 _ 2.0 _ 1.0 _ 0.0 _ 1.0 _ 3,5 _ 0.0 _11.5 _4.0 _ 0.0 ____ 25.0

1950s _______ 0.0 _ 0.0 _ 8.0 _ 0.0 _ 4.0 _ 0.0 _ 6.0 _ 1.0 _ 0.0 _ 0.0 ____ 19.0

1960s _______ 1.0 _ 0.0 _ 3.0 _ 3.0 _ 2.0 _ 2.5 _ 4.0 _ 1.0 _ 1.0 _ 0.0 ____ 17.5

1970s _______ 0.0 _ 1.0 _ 1.0 _ 1.0 _ 3.0 _ 2.0 _ 1.0 _ 5.0 _ 3.0 _ 6.0 ____ 23.0

1980s _______ 2.5 _ 6.0 _ 3.0 _ 1.0 _ 1.0 _ 2.5 _ 4.0 _ 3.0 _ 0.0 _ 0.0 ____ 23.0

1990s _______ 0.0 _ 0.0 _ 0.0 _1.5 _ 1.33_ 2.0 _ 1.0 _ 1.0 _ 0.0 _ 0.0 _____6.83

2000s _______ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _ 0.0 _____0.0

2010s _______ 7.0 _ 0.0 _ 0.0 _ 3.0 _ 0.0 _ 0.0 _ 0.0 _ 1.0 _ 3.5 _ 1.0 ____ 15.5

2020s _______ 0.0 _ 0.0 __ __ (future years >>) _________________________ 0.0

=================================================

(note: 2021 had the lowest minimum for 7, 12 and 13 April but on those three dates the low maxima failed to set records by margins of about four degrees even looking at the days before the record low minima -- for example the max on 5 Apr was 6.4 and 6 Apr 6.7, but these were nowhere near the low max records from 1911 of 2.3 and 4.1 C. Minima had fallen below the 1911 record for 7th and the existing records for 12th-13th by about one degree. The 11th-12th maxima were 8.0 and 9.2, the records being 5.4 and 3.7 both set in 1879. By the 12th, the record low maximum was 3.7 from 1892 and 2021 had 12.0 -- so in at least this one case the diurnal range was much larger in the recent case, probably due to an absence of snow cover).

Also if you check 1962-63 in the table you'll see a rather meagre total of 6 record low maxima, not all of them in the winter (one was in May 1962), and that may seem quite low given the reputation of 1962-63 as a very cold winter, but other than a spell in late Jan 1963 all the other cold parts of that winter were slightly outdone by much briefer cold spells in other winters. The winter of 1947 fared better with numerous records set, and Nov-Dec 2010 also did quite well. So this table does not tell a complete story as would be the case for any other single element; what it does say rather clearly is that record cold is quite unusual in the modern climate and that is probably because arctic air masses are infrequent; when they do arrive they still set records as seen in winter 1981-82 and four days setting 3.5 record count in the period 28 Feb to 18 Mar 2018.

================================================

FREQUENCY of HIGH MINIMUM Daily CET records 1878-present

 

Year ending ___ 0 ___1 ___ 2 ___3 ___ 4 ___5 ___ 6 ___ 7 ___8 ___ 9 ____ total (adjusted)

1870s _______ -- ___ -- ___ -- ___ -- ___-- ___ -- ___-- ___ --___ 3.5 _ 0.0____ 3.5 (17.5)

1880s _______ 1.0 _ 0.0 _ 2.0 _ 0.0 _ 0.0 _ 0.0 _ 1.0 _ 0.0 _ 3.0 _ 0.0 ____ 7.0

1890s _______ 2.0 _ 0.0 _ 0.5 _3.33_ 2.0 _ 2.5 _ 2.0 _ 1.0 _ 5.5 _ 1.0 ___ 19.83

1900s _______ 1.0 _ 0.0 _ 0.0 _ 3.0 _ 1.0 _ 1.0 _ 1.0 _ 0.0 _ 3.0 _ 1.0 ___ 11.0

1910s _______ 0.0 _ 4.0 _ 2.0 _ 0.5 _ 0.0 _ 0.0 _ 1.0 _ 1.0 _ 1.0 _ 0.0_____ 9.5

1920s _______ 1.0 _ 3.5 _ 1.0 _ 5.0 _ 0.0 _ 2.0 _ 4.5 _ 2.0 _ 3.5 _ 0.0 ____ 22.5

1930s _______ 2.0 _ 2.0 _ 5.0 _ 1.0 _ 2.0 _ 4.0 _ 2.0 _ 2.5 _ 5.0 _ 6.0 ____ 31.5

1940s _______ 0.0 _ 3.5 _ 2.0 _ 0.0 _ 2.0 _ 8.5 _ 0.0 _11.0 _3.0 _ 4.0 ____ 34.0

1950s _______ 1.0 _ 1.0 _ 2.0 _ 3.0 _ 2.0 _ 0.0 _ 1.0 _ 3.5 _ 2.5 _ 1.5 ____ 17.5

1960s _______ 2.0 _ 2.0 _ 1.0 _ 1.0 _ 2.0 _ 0.0 _ 0.0 _ 1.0 _ 2.5 _ 2.5 ____ 14.0

1970s _______ 0.0 _ 1.5 _ 0.5 _ 1.0 _ 0.0 _ 2.0 _ 4.0 _ 2.0 _ 2.0 _ 1.0 ____ 14.0

1980s _______ 2.0 _ 4.0 _ 2.0 _ 4.0 _ 2.0 _ 6.0 _ 0.0 _ 4.0 _ 0.0 _ 5.5 ____ 29.5

1990s _______ 4.0 _ 2.5 _ 0.5 _ 2.5 _ 7.0 _ 5.0 _ 1.0 _ 7.5 _ 3.0 _ 5.0 ____ 38.0

2000s _______ 6.5 _ 2.0 _ 3.5 _ 5.0 _ 6.0 _ 8.5 _11.0_ 4.0 _ 3.0 _ 1.0 ____ 50.5

2010s _______ 0.0 _11.0_2.33_1.33_ 7.0 _ 6.5 _ 9.0 _ 6.5 _ 6.0 _ 3.0 ____ 52.67

2020s _______ 6.0 _ 4.0 _ 1.0_ (future years >> ) _______________________11.0 (55)

-------------------------------------

(the adjusted values for the two shorter intervals are pro-rated as these intervals are only 20% as long as the decades, so the values in brackets are comparable on that basis. )

Note that the frequency of high minima increase rapidly after about 1990. This is a faster increase than that of the high maxima. The situation has become about like this -- if a very mild or warm day comes along, and comes within 0.5 C of the long-term maximum record, then it is quite likely to set a new minimum record either the same day or the next. If it breaks the existing maximum record it is very likely to break the existing high minimum. So both tides are rising so to speak but the high minimum tide is rising a bit faster. 

In both tables, the frequency at random for any given year is 2.54, so for any full decade it is 25.4 ... the recent trend to near double the random count of high minima began in the mid 1980s after about ten years (1975-84) of near-random outcomes. The period from about 1951 to 1974 set somewhat fewer high minima than random expectation, while the 1930s and 1940s ran generally somewhat above random.

A variability index might consist of the number of warm records multiplied by cold records, and in these two tables, 1947 stands out as having very high counts of both record high minima and low maxima (11 and 11.5). Although 1947 is best known for its very cold late January, February and early March when most of those low minima were set, there were two notable warm spells also, one in late May and early June, and the other in mid-November. This is when most of the 1947 high minima occurred although a warm August-September period contributed a few also. The next most variable years by this measure were 1898, 1945, 1895, 1971, 2008, 1912, 1903, 1908, 1923, 1926 and 1975. 

(note, two new records set 31 Dec 2021 and 1 Jan 2022 are in the table now replacing 1901 and 2012. The 1 Jan provisional is high enough that I feel confident about including it but to be confirmed at end of month). 

 

Edited January 2, 2022 by Roger J Smith

[Roger J Smith]

The recent temperature records have been included where necessary, and frequency tables adjusted. The 1 Jan 2022 records will be confirmed after end of the month but they are high enough that I feel confident they won't be adjusted out of the record category. 

Once I catch up with more urgent matters, I will adjust the first table in the thread showing all-time average daily values to include 2021, and look for any other tables to bring in from the old thread that has sunk way down in the table of contents to around page ten now.

This past three-day spell of new record high daily means makes it just the 16th such spell in 250 years, a list of the others follows. In addition there were 38 cases of two consecutive only, and several more where two of three days or other nearby associated days were in the records. Almost half of the daily record highs are part of some grouping of consecutive or nearby days. 

The other fifteen intervals with 3 or 4 consecutive record high daily means: 

2015 has the only surviving four-day spell (16 to 19 Dec)

The three-day intervals are 3-5 Feb 2004, 10-12 Mar 1957, 25-27 Mar 1777, 28-30 Apr 1775, 9-11 June 1970, 28-30 June 1976, 2-4 July 1976, 6-8 July 1976 (two of these tied), 28-30 July 1948, 31 Aug - 2 Sep 1906 (one tied), 24-26 Sep 1895, 28-30 Sep 2011, 12-14 Nov 1938 (one tied) and 21-23 Nov 1947. Hon mention to 31 May to 3 June 1947 which had three of four, and noting that 2011 added two more on 2,3 Oct after just missing the 1 Oct record from 1985. 

Note that no entries appear on this list from 1778 to 1894 inclusive. 

 

Edited August 23, 2022 by Roger J Smith

[Roger J Smith]

Some new entries have been made in the table of weekly extreme values. These are still back in the original thread (posted around 2011-12 and edited to 2019 before this thread gradually replaced it). The link is here:

https://www.netweather.tv/forum/topic/73431-daily-cet-average-values-1772-2011/page/4/#comments

The new entries are mostly 2nd and 3rd place entries in July and September (one first place in Sept), as follows (with previously inserted new values for 24-25 Feb also): 

 

24 Feb ___ 9.53 1990 ____ 9.21 2021 ____ 9.17 2019 

25 Feb ___ 9.67 1990 ____ 9.33 2019 ____ 9.27 2021

22 Jul ___ 21.87 2006 ___ 20.91 2021 ___ 20.53 1868 

23 Jul ___ 21.91 2006 ___ 21.03 2021 ___ 20.60 1989 

24 Jul ___ 21.79 2006 ___ 21.04 1989 ___ 20.59 2021 

09 Sep ___ 19.96 1898 ___ 18.40 2021 ___ 18.39 1973 

10 Sep ___ 19.56 1898 ___ 18.74 2021 ___ 18.19 1795 

11 Sep ___ 19.26 1898 ___ 19.19 2021 ___ 18.31 1795 

12 Sep ___ 18.77 2021 ___ 18.57 1898 ___ 18.44 1865 

13 Sep ___ 18.53 1865 ___ 18.24 2021 ___ 17.70 1795 

14 Sep ___ 18.44 1865 ___ 17.61 2016 ___ 17.51 2021 

 

There will likely be four new entries made for weeks ending 1-5 January, the mild spell did not start early enough to boost 25-31 Dec into third at 8.51 but using provisional values for 1-5 Jan the averages are 9.56, 10.19, 10.53, 9.89, and 9.01 (despite 4-5 Jan being rather cool). Once these values are adjusted they will appear in the January portion of the linked tables. 

[Roger J Smith]

The first post in this thread shows the daily averages over the full period of the CET which is now 250 years (1772 to 2021). Most of them changed by amounts of .03 or less but the very warm spells in September and December as well as some of the colder days in April moved some values by as much as .06. 

The thread also contains any edits required for the warmth of 1 Jan 2022 which set new records for daily mean, max and min in January. These new values are 12.6, 14.3 and 10.9. The values before this event were 11.6, 14.0 and 10.5. The changes are not all the same because previously, the record high means were not always associated with record high max or min. Now all three are on the 1st Jan 2022. There were no other records set. 

[Roger J Smith]

Catching up on some recent records, 16-25 Jan and 17-26 Jan established new record low (CEP) ten-day totals of 0.6 mm. The interval 20th-29th had only 0.2 mm but the record there was only 0.1 mm (1991). Most of the totals from 10th-19th to 20th-29th were close to the existing records and were all below 1.2 mm. I already noted some record high daily temps in late Dec and on first of Jan, but 16th of Feb joins them with 14.8 C replacing 14.2 C from 2019, and 10.3 the daily mean replacing 10.0 from 1928, which had been the lowest record high mean value in February. That now shifts to 10.2 on 14th February of 1794. 

Despite some wet days in Dec and Feb it does not appear that daily records were broken (for CEP at any rate). The value of 10.23 mm on 20th Feb would have broken records on 14th, 16th, 21st or 23rd of Feb but on the 20th the record was 11.8 mm in 1969. 9.5 mm on 17th Feb would also have broken the previous day's record and 14th or 21st Feb. 

[Roger J Smith]

This thread has been substantially edited in the past six months to attempt to show v2.0 CET records in context. There are some tasks remaining, and a linked thread is provided for some other secondary records in v2.0. 

There were four new daily mean highs set in October, one being a tie with an adjusted v2.0 value for 28 Oct 1888 that was higher in CET legacy, all the rest broke both legacy and v2.0 values. There were also a number of daily records set in July and August. 

 

[Roger J Smith]

Dry spells tabulated for CEP 1931-2022

The tabulations are based on rounded data to nearest 0.1 mm, some data was to that precision and some was to nearest .01 mm. 

Regardless of what the total of those smaller second decimals might have been, the dry spells must meet these criteria: absolute dry spells are 7 or more consecutive days with zero precip. Extended dry spells can be extensions of those that satisfy the rules listed, or may only qualify by these rules: 7-9 days can only total 0.1-0.2 mm; 10-12 days can only total 0.1-0.3 mm, 13-15 days can only total 0.1-0.4 mm, etc, so any portion of three additional days is allowed 0.1 mm additional precip. There are some cases where two adjacent absolute dry spells become a composite extended dry spell with a small amount separating them (first of those is Mar 1938 below). Alternatively, an absolute dry spell can have no extension to form a longer extended dry spell because amounts are too great on days before and after (first example of that in the list below is 19-28 Jan 1933). Because the lists could be used to research relative length of dry spells, these non-extended ADS periods are repeated in the EDS column with zero precip shown. In terms of definition, an ADS is automatically an EDS regardless of any extensions or lack thereof. 

This list is chronological but the top twenty in duration in each category are identified at the end of the chronological list.

ADS ___ EDS ___ Duration of ADS __ Duration of EDS and amount

 --- --- __ 10d ___ (none 7d+) ________ 21-30 Mar 1931 (0.2 mm)

 --- --- ___ 9d ___ (none 7d+) ________ 23-31 Aug 1931 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ________ 25-31 Jan 1932 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ________ 27 Feb-4 Mar 1932 (0.1 mm)

 --- --- ___ 9d ___ (none 7d+) ________ 12-20 Mar 1932 (0.2 mm)

_ 7d ____13d ___ 12-18 Jun 1932 ____ 12-24 Jun 1932 (0.4 mm)

_10d ___ 10d ___ 19-28 Jan 1933 ____ 19-28 Jan 1933 ( zero )

 --- --- ___ 7d ____ (none 7d+) ________ 9-15 Mar 1933 (0.2 mm)

_ 8d _____9d ___ 21-28 Mar 1933 ____21-29 Mar 1933 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) _________ 3-9 June 1933 (0.1 mm)

_10d ___10d ___ 27 Jun- 6 Jul 1933 __ 27 Jun -6 Jul 1933 ( zero )

_ 8d ____ 8d ___ 20-27 Jul 1933 ______20-27 Jul 1933 ( zero )

_ 9d ____10d ___ 1-9 Aug 1933 ______ 31 Jul - 9 Aug 1933 (0.1 mm)

_ 7d ____ 7d ___ 24-30 Aug 1933 ____ 24-30 Aug 1933 ( zero )

_ 7d ____11d ___ 1-7 Sep 1933 ______ 1-11 Sep 1933 (0.1 mm) __ note: 1.2 mm 31 Aug separates two

_ 7d ____ 8d ___ 28 Nov -4 Dec 1933 _ 28 Nov - 5 Dec 1933 (0.1 mm)

_11d ___20d ___ 5-15 Feb 1934 ______ 4 - 23 Feb 1934 (0.4 mm)

 --- --- ___ 7d ___ (none 7d+) __________27 Mar - 2 Apr 1934 (0.1 mm)

_ 9d ___ 12d ___ 26 May - 3 Jun 1934 _ 24 May - 4 Jun 1934 (0.3 mm)

_12d ___13d ___ 29 Jun - 10 Jul 1934 __29 Jun - 11 Jul 1934 (0.1 mm)

 --- --- ___10d ___ (none 7d+) __________ 5 -14 Sep 1934 (0.3 mm)

_10d ___12d ___ 2-11 May 1935 _______ 1-12 May 1935 (0.3 mm)

 --- --- ___ 7d ___ (none 7d+) ___________ 20-26 May 1935 (0.2 mm)

 --- --- ___ 9d ___ (none 7d+) ____________2-9 Jul 1935 (0.2 mm)

 --- --- ___17d ___ (none 7d+) ___________21 Jul - 6 Aug 1935 (0.2 mm)

 --- --- ___10d ___ (none 7d+) __________ 10-19 Mar 1936 (0.3 mm)

_ 7d ____13d ___ 21-27 Aug 1936 ______ 21 Aug - 2 Sep 1936 (0.3 mm)

_ 7d ____ 7d ____27 May - 2 Jun 1937 __ 27 May - 2 Jun 1937 ( zero )

_ 7d ____ 8d ____28 Jul - 3 Aug 1937 ___ 27 Jul - 3 Aug 1937 (0.2 mm)

_ 9d ____ 9d ____21-29 Aug 1937 ______ 21-29 Aug 1937 ( zero ) __ 17-31 Aug 0.6 mm

 --- ---___13d ___ (none 7d+) ___________ 27 Sep - 10 Oct 1937 (0.4 mm)

_ 7d ____ 8d ____ 13-19 Oct 1937 ______ 13-20 Oct 1937 (0.2 mm) __ only 0.6 mm 11-12 Oct

 --- --- ___ 8d ___ (none 7d+) ____________ 1-8 Feb 1938 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 18-24 Feb 1938 (0.2 mm)

_ 7d (2) _ 24d __ 9-15, and 17-23 Mar 1938 _ 28 Feb - 23 Mar 1938 (0.5 mm)

_12d ___14d ___ 5-16 Apr 1938 _________ 3-16 Apr 1938 (0.3 mm) 

_ 8d ____ 8d ____4-11 May 1938 ________ 4-11 May 1938 ( zero )

 --- --- ___ 7d ____ (none 7d+) ___________ 4-10 Nov 1938 (0.2 mm) _ very warm also

_ 9d ____ 9d ____29 Jan - 6 Feb 1939 ____29 Jan - 6 Feb 1939 ( zero )

 --- --- ___ 7d ____ (none 7d+) ___________ 6-12 Apr 1939 (0.1 mm)

_16d ___ 23d ___ 25 May - 9 Jun 1939 ___18 May - 9 Jun 1939 (0.7 mm)

_ 8d ____ 8d ____12-19 Aug 1939 ________12-19 Aug 1939 ( zero )

 --- --- ___ 8d ____ (none 7d+) ____________29 Dec 1939 - 5 Jan 1940 (0.2 mm)

 --- --- ___ 7d ____ (none 7d+) ____________ 8-14 Jan 1940 (0.2 mm)

_ 9d ____10d ____31 May - 8 Jun 1940 ___ 30 May - 8 Jun 1940 (0.1 mm)

_ 8d ____12d ____30 Jul - 6 Aug 1940 ____ 28 Jul - 8 Aug 1940 (0.2 mm)

_ 8d ____11d ____30 Aug - 6 Sep 1940 ___ 28 Aug - 7 Sep 1940 (0.3 mm)

_ 9d ____10d ____11-19 Mar 1941 _______ 11-20 Mar 1941 (0.2 mm)

_14d ___ 23d ____19 Jun - 2 Jul 1941 _____ 15 Jun - 7 Jul 1941 (0.7 mm)

 --- --- ___13d ____(none 7d+) ____________ 15-27 Sep 1941 (0.4 mm)

 --- --- ___ 7d ____ (none 7d+) ____________ 13-19 Feb 1942 (0.1 mm)

 --- --- ___ 7d ____ (none 7d+) ____________ 24 Feb - 2 Mar 1942 (0.2 mm)

_ 7d ____ 8d ____ 21-27 Mar 1942 _______ 20-27 Mar 1942 (0.1 mm)

_ 9d ____ 9d ____ 10-18 Apr 1942 ________10-18 Apr 1942 ( zero ) __ part of next longer EDS

_14d ___30d ____23 Apr - 6 May 1942 ___ 10 Apr - 9 May 1942 (0.9 mm) __ 0.8 mm of which 19-22 Apr

_10d ___ 16d ___ 19-28 Jun 1942 ________ 17 Jun - 2 Jul 1942 (0.5 mm)

 --- --- ___ 7d ____ (none 7d+) ____________ 6 - 12 Sep 1942 (0.2 mm)

_25d ___ 35d ___ 17 Feb - 13 Mar 1943 __16 Feb - 22 Mar 1943 (0.6 mm) __ only 0.2 mm to 18th

 --- --- ___ 9d ____ (none 7d+) ____________ 8 - 16 Apr 1943 (0.2 mm)

_10d ___ 11d ___ 12-21 May 1943 _______ 11-21 May 1943 (0.2 mm)

 --- --- ___14d ____(none 7d+) ____________21 Jun - 4 Jul 1943 (0.4 mm)

_ 8d ____15d ____23-30 Jul 1943 ________ 16-30 Jul 1943 (0.3 mm)

_10d ___ 14d ___ 22 Apr -1 May 1944 ___ 20 Apr - 3 May (0.4 mm)

_ 7d ____ 7d ____ 6-12 May 1944 _________6-12 May 1944 ( zero )

 --- --- ___ 9d ____(none 7d+) _____________9-17 Aug 1944 (0.2 mm)

 --- --- ___ 7d ____(none 7d+) _____________8-14 Mar 1945 (0.2 mm)

 --- --- ___ 7d ____(none 7d+) _____________14-20 Jun 1945 (0.2 mm)

_12d ___13d ____28 Sep - 9 Oct 1945 ____28 Sep -10 Oct 1945 (0.3 mm) __ 1.3 mm 28 Sep - 19 Oct, 2.6 mm 25 Sep-19 Oct

_ 8d ___ 12d ____23-30 Mar 1946 _______ 23 Mar - 3 Apr 1946 (0.2 mm)

_ 9d ___ 10d ____ 7-15 Apr 1946 _________ 7-16 Apr 1946 (0.1 mm)

 --- --- ___ 7d ____(none 7d+) _____________ 6-12 May 1946 (0.1 mm)

_ 8d ____ 8d ____ 5-12 Jul 1946 ___________5-12 Jul 1946 ( zero )

(--- --- __ 12d ___ (none 7d+) _____________ 6-17 Oct 1946 (0.4 mm)) __ fails to qualify by 0.1 mm or 1 d 

_ 9d ___ 11d ____9-17 Apr 1947 __________9-19 Apr 1947 (0.3 mm)

15,12d _ 36d __8-22 Aug & 24 Aug-4 Sep 1947 __ 6 Aug - 10 Sep 1947 (0.7 mm) __ hot

_ 7d ____13d ____30 Sep - 6 Oct 1947 ____ 30 Sep - 12 Oct 1947 (0.3 mm)

_ 8d ____ 8d ____ 8-15 Mar 1948 _________ 8-15 Mar 1948 ( zero )

 --- --- ___ 7d ____(none 7d+) _____________ 22-28 Mar 1948 (0.2 mm)

_ 7d ____ 7d ____ 9-15 Apr 1948 _________ 9-15 Apr 1948 ( zero )

_ 9d ____10d ____13-21 May 1948 _______12-21 May 1948 (0.2 mm)

_10d ___10d ____23 Jul - 1 Aug 1948 ____ 23 Jul - 1 Aug 1948 (zero) __ record heat, 23.2 mm 2nd Aug, 76 mm 2-12 Aug

 --- --- __ 11d ____(none 7d+) ____________ 29 Sep - 9 Oct 1948 (0.2 mm)

 --- --- ___ 8d ____(none 7d+) _____________7 -14 May 1949 (0.2 mm)

_19d ___20d ___ 15 Jun - 3 Jul 1949 _____ 14 Jun - 3 Jul 1949 (0.3 mm) __ 1.8 mm 14 Jun - 12 Jul 1949

_11d ___15d ___ 12-22 Aug 1949 ________11-25 Aug 1949 (0.3 mm)

_ 9d ____ 9d ____ 5-13 Sep 1949 _________ 5-13 Sep 1949 ( zero )

 --- --- ___ 8d ____(none 7d+) ____________ 30 Sep - 7 Oct 1949 (0.1 mm) __ 0.5 mm 25 Sep - 7 Oct 1949

_ 7d ____ 7d ____ 6-12 Jan 1950 __________ 6-12 Jan 1950 ( zero ) __ 3.3 mm 4-28 Jan 1950

 --- --- ___ 8d ____(none 7d+) ____________ 24-31 Mar 1950 (0.1 mm)

_ 8d ____ 9d ____10-17 May 1950 ________ 9-17 May 1950 (0.1 mm)

_ 9d ____10d ___ 3-11 Jun 1950 __________3-12 Jun 1950 (0.2 mm) __ 0.7 mm 28 May - 12 Jun 1950

_ 8d ____ 9d ____18-25 Oct 1950 ________ 18-26 Oct 1950 (0.1 mm)

_11d ___ 11d ___ 16-26 Apr 1951 ________16-26 Apr 1951 ( zero )

_12d ___ 12d ___ 28 May - 8 Jun 1951 ____28 May - 8 Jun 1951 ( zero )

_ 9d ____ 9d ____ 4-12 Oct 1951 __________4-12 Oct 1951 ( zero )

(--- --- ___ 9d ___ (none 7d+) _____________ 19-27 Feb 1952 (0.3 mm)) __ fails to qualify by 0.1 mm or 1 d, 0.7 mm to 2 Mar 

 --- --- ___ 8d ___ (none 7d+) _____________ 23-30 Jun 1952 (0.2 mm)

_ 8d ____ 9d ____ 18-25 Jul 1952 _________ 18-26 Jul 1952 (0.1 mm)

 --- --- ___ 7d ____(none 7d+) _____________20-26 Aug 1952 (0.2 mm) __ 0.6 mm to 1 Sep (13d) 

 --- --- ___ 8d ___ (none 7d+) _____________ 16-23 Jan 1953 (0.2 mm)

_7d,9d _34d __ 20-26 Feb, 28Feb-9 Mar 1953 _ 20 Feb - 25 Mar 1953 (0.8 mm) _ 20 Feb-9 Mar (18d, 0.1 mm)

_ 8d ____ 8d ____18-25 Apr 1953 _________18-25 Apr 1953 ( zero )

_11d ___11d ____2-12 May 1953 _________ 2-12 May 1953 ( zero )

 --- --- ___ 7d ____(none 7d+) _____________28 Jun - 4 Jul 1953 (0.1 mm)

 --- --- ___10d ___ (none 7d+) _____________4-13 Sep 1953 (0.3 mm)

_11d ___11d ____1-11 Oct 1953 __________1-11 Oct 1953 ( zero )

_ 8d ____ 9d ____15-22 Nov 1953 ________ 15-23 Nov 1953 (0.2 mm)

 --- --- ___ 7d ____(none 7d+) _____________ 22-28 Jan 1954 (0.1 mm)

_ 9d ____ 9d ____10-18 Mar 1954 _________10-18 Mar 1954 ( zero )

 --- --- ___17d ___ (none 7d+) _____________ 13-29 Apr 1954 (0.5 mm) __ 0.8 mm 7-29 Apr (23d) 

_ 8d ____ 8d ____25 Feb - 4 Mar 1955 _____25 Feb - 4 Mar 1955 ( zero )

_11d ___ 12d ___11-21 Apr 1955 _________ 10-21 Apr 1955 (0.1 mm)

 --- --- ___ 7d ____(none 7d+) ______________ 4-10 Jul 1955 (0.2 mm)

_14d ___ 14d ___ 19 Jul - 1 Aug 1955 ______19 Jul - 1 Aug 1955 ( zero )

 --- --- ___ 8d ____(none 7d+) _____________ 24 Sep - 1 Oct 1955 (0.1 mm)

 --- --- ___ 8d ____(none 7d+) _____________ 8 -15 Oct 1955 (0.2 mm)

 --- --- ___ 7d ____(none 7d+) _____________ 12 -18 Nov 1955 (0.2 mm)

_ 7d ____ 7d ____25 Nov - 1 Dec 1955 ____ 25 Nov - 1 Dec 1955 ( zero ) __ 0.5 mm 25 Nov - 7-Dec (13d) 

_ 7d ____ 8d ____7-13 Mar 1956 __________ 7-14 Mar 1956 (0.2 mm)

 --- --- ___ 9d ____(none 7d+) _____________ 12 -20 Sep 1956 (0.2 mm)

_ 7d ____ 7d ____9-15 Oct 1956 __________ 9 -15 Oct 1956 ( zero )

 --- --- ___ 8d ____(none 7d+) _____________ 15 -22 Nov 1956 (0.1 mm)

_ 7d ____ 7d ____26 Feb - 4 Mar 1957 _____26 Feb - 4 Mar 1957 ( zero )

_ 7d ____ 7d ____30 Mar - 5 Apr 1957 _____30 Mar - 5 Apr 1957 ( zero )

_ 9d ____ 9d ____25 May - 2 Jun 1957 _____ 25 May - 2 Jun 1957 ( zero )

_ 9d ____ 9d ____12 Jun - 20 Jun 1957 _____ 12 Jun - 20 Jun 1957 ( zero )

_ 9d ____ 9d ____1 - 9 Oct 1957 ____________1 - 9 Oct 1957 ( zero )

 --- --- ___13d ___ (none 7d+) _____________ 23 Nov - 5 Dec 1957 (0.3 mm)

_ 7d ____ 8d ____23-29 Oct 1958 __________22-29 Oct 1958 (0.1 mm)

 --- --- ___9d ____ (none 7d+) ______________ 31 Jan - 8 Feb 1959 __ 2,2 mm 24 Jan - 20 Feb

 --- --- ___ 8d ____(none 7d+) _____________ 22 Feb - 1 Mar 1959 (0.1 mm) 

_ 9d ____ 9d ____22-30 May 1959 _________22-30 May 1959 ( zero )

_ 9d ___11d ____12-20 Jun 1959 __________10-20 Jun 1959 (0.2 mm)

_7d (2) _31d ___ 14-20 Aug, 7-13 Sep 1959 _ 14 Aug - 13 Sep (1.0 mm) _ 2,2 mm 14 Aug - 20 Sep (38d)

_14d ___15d ____26 Sep - 9 Oct 1959 ______25 Sep - 9 Oct 1959 (0.1 mm) _ 4.3 mm 14 Aug - 9 Oct (57d)

_ 7d ____ 7d ____19-25 Mar 1960 __________19-25 Mar 1960 ( zero )

_ 7d ____ 8d ____ 17-23 Apr 1960 _________ 16-23 Apr 1960 (0.2 mm)

_12d ___ 12d ___ 24 May - 4 Jun 1960 _____ 24 May - 4 Jun 1960 ( zero )

__________________________________________

(2 further posts will finish this list in the next few days, analysis to follow)

 

 

 

[Roger J Smith]

CEP dry spells (continued) __ 1961 to 1990 __ see previous post for protocols

 

ADS ___ EDS ___ Duration of ADS __ Duration of EDS and amount

_10d ___ 10d ___13-22 Feb 1961 ____13-22 Feb 1961 ( zero )

 --- --- __ 15d ___ (none 7d+) ________ 3-17 Mar 1961 (0.3 mm) __ 2.2 mm 18th-20th before next entry

_ 7d _____ 8d ___ 22-28 Mar 1961 ___ 21-28 Mar 1961 (0.2 mm) __ 3.6 mm 1st-28th (28d)

_ 7d ____ 12d ___ 20-26 May 1961 ___15-26 May 1961 (0.1 mm) __ 1.2 mm 8th-26th (19d)

_ 8d ____ 8d ____ 19-26 Jul 1961 _____19-26 Jul 1961 ( zero )

_ 7d ____ 7d ____ 26 Aug - 1 Sep 1961__26 Aug - 1 Sep 1961 ( zero )

 --- --- ___11d ___ (none 7d+) ________14-24 Dec 1961 (0.1 mm) 

 --- --- ___ 7d ___ (none 7d+) ________ 17-23 Feb 1962 (0.1 mm) 

 --- --- ___ 7d ___ (none 7d+) ________ 13-19 Mar 1962 (0.2 mm)

 --- --- ___ 9d ___ (none 7d+) ________ 14-22 Apr 1962 (0.2 mm) 

_10d ___ 10d ___30 May - 8 Jun 1962_ 30 May - 8 Jun 1962 ( zero ) __ 4.1 mm 30 May - 23 Jun (25d), see next

 --- --- ___ 7d ___ (none 7d+) ________ 2-8 Jul 1962 (0.2 mm) __ incl above, 8.3 mm 30 May - 8 Jul (40d)

_13d ___ 22d ___ 11-23 Oct 1962 ___ 2-23 Oct 1962 (0.3 mm) 

_11d ___ 14d ___ 26 Nov -6 Dec 1962 _24 Nov -7 Dec 1962 (0.4 mm) 

_ 9d ___ 10d ___ 23 Feb -3 Mar 1963 __22 Feb -3 Mar 1963 (0.1 mm) 

_ 7d ____ 7d ___ 26 Jul -1 Aug 1963 __ 26 Jul -1 Aug 1963 ( zero )

_ 8d ___ 10d ___ 1-8 Jan 1964 ________1-10 Jan 1964 (0.3 mm)

_ 7d ___ 11d ___ 5-11 Feb 1964 ______ 4-14 Feb 1964 (0.3 mm)

_ 8d ____ 9d ___ 24 Jun - 2 Jul 1964 __ 23 Jun - 3 Jul 1964 (0.1 mm)

_ 7d ____ 8d ___ 29 Aug -4 Sep 1964 _ 28 Aug -4 Sep 1964 (0.2 mm) __ 2.3 mm 5th then next interval

_ 7d ____ 7d ___ 6 -12 Sep 1964 ______ 6 -12 Sep 1964 ( zero ) 

_ 8d ____ 8d ___ 27 Sep -4 Oct 1964 __ 27 Sep -4 Oct 1964 ( zero ) 

 --- --- ___ 7d ___ (none 7d+) __________ 4-10 Nov 1964 (0.2 mm)

_ 7d ___ 10d ___ 27 Mar -2 Apr 1965 __27 Mar -5 Apr 1965 (0.2 mm)

_10d ___ 10d ___4 -13 Oct 1965 ______ 4 -13 Oct 1965 ( zero ) __ 3.2 mm 14th then next interval

_ 9d ____ 9d ___ 15 -23 Oct 1965 _____ 15 -23 Oct 1965 ( zero ) 

 --- --- ___ 7d ___ (none 7d+) __________ 5-11 Jan 1966 (0.2 mm)

 --- --- ___10d ___ (none 7d+) __________13-22 Mar 1966 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) __________ 27 Apr - 3 May 1966 (0.2 mm)

_ 9d ____ 9d ___ 26 May -3 Jun 1966 __ 26 May -3 Jun 1966 ( zero ) 

_11d ___ 13d ___18-28 Sep 1966 _____ 16-28 Sep 1966 (0.1 mm)

_ 7d ____ 12d ___9-15 Jun 1967 _______ 9-20 Jun 1967 (0.2 mm)

 --- --- ____ 9d ___(none 7d+) __________ 28 Jun -6 Jul 1967 (0.1 mm) __ 2.6 mm 7th then next interval

 --- --- ___ 7d ___ (none 7d+) __________ 8 -14 Jul 1967 (0.2 mm)

 --- --- ___11d ___(none 7d+) __________20-30 Aug 1967 (0.3 mm)

_10d ___ 11d ___ 24 Feb -4 Mar 1968 _ 23 Feb -4 Mar 1968 (0.1 mm)

 --- --- ___ 10d ___(none 7d+) _________ 6-15 Apr 1968 (0.2 mm)

_ 7d ____ 7d ___ 24-30 Jul 1968 _______ 24-30 Jul 1968 ( zero )

_ 7d ____ 8d ___ 21-27 Aug 1968 ______20-27 Aug 1968 (0.2 mm)

_ 7d ____ 7d ___ 2 - 8 Apr 1969 _______ 2 - 8 Apr 1969 ( zero )

_10d ___ 11d ___4-13 June 1969 ______ 4-14 June 1969 (0.2 mm)

 --- --- ___ 12d ___(none 7d+) _________  11-22 Jul 1969 (0.2 mm) __ 9.1 mm (daily record) on 23rd, total 61 mm by 30th

_ 8d ____ 10d ___ 2-9 Sep 1969 _______ 31 Aug - 9 Sep 1969 (0.2 mm)

(not able to qualify for an ADS or EDS but only 4.1 mm rain fell in 31d from 18 Sep to 18 Oct 1969)

_ 9d ____ 9d ____30 May - 7 Jun 1970 _ 30 May -7 Jun 1970 ( zero ) __ hot, only 1.0 mm total 30 May to 16 Jun (18d)

_ 7d ____ 7d ___ 29 Jul - 4 Aug 1970 ___ 29 Jul - 4 Aug 1970 ( zero )

 --- --- ___ 7d ___ (none 7d+) __________ 23-29 Aug 1970 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) __________ 22-28 Sep 1970 (0.2 mm)

_ 7d ____15d ___ 2 - 8 Apr 1971 _______ 1 -15 Apr 1971 (0.4 mm)

_ 8d ____ 8d ____28 Apr -5 May 1971 __28 Apr -5 May 1971 ( zero )

_ 8d ____10d ___ 12-19 Jul 1971 _______ 12-21 Jul 1971 (0.3 mm)

_ 7d ____ 7d ___ 4-10 Oct 1971 ________ 4-10 Oct 1971 ( zero )

_14d ___ 15d ___22 Oct -4 Nov 1971 ___21 Oct -4 Nov 1971 (0.2 mm)

 --- --- ____ 9d ___(none 7d+) ___________ 3-11 Dec 1971 (0.2 mm)) _ 3-17 Dec, 0.5 mm (15d), failed to qualify by 0.1 mm or 1 day

_ 9d ____ 9d ____16-24 Mar 1972 ______ 16-24 Mar 1972 ( zero )

_ 8d ____10d ___ 12-19 Jul 1972 _______ 10-19 Jul 1972 (0.1 mm)

_13d ___ 23d ___ 21 Aug -2 Sep 1972 __ 11 Aug -2 Sep 1972 (0.6 mm) __ 11 Aug - 6 Sep 0.9 mm (27d)*

_11d ___ 21d ___ 25 Sep -5 Oct 1972 __ 19 Sep - 9 Oct 1972 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ___________ 12-18 Oct 1972 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ___________ 17-23 Dec 1972 (0.2 mm)

 --- --- ___17d ___(none 7d+) ___________  7-23 Mar 1973 (0.4 mm)

 --- --- ___15d ___(none 7d+) ___________ 4-18 Jun 1973 (0.4 mm) __ followed by 35.6 mm record daily 19th June

 --- --- ____7d ___ (none 7d+) ___________ 28 Jun - 4 Jul 1973 (0.1 mm) __ 19-27 Jun total rain 74.4 mm

_ 7d ____ 8d ___ 9-15 Aug 1973  ________ 8-15 Aug 1973 (0.1 mm)

_10d ___11d ___ 5-14 Sep 1973 ________ 4-14 Sep 1973 (0.2 mm)

_ 7d ____11d ___ 23-29 Oct 1973 _______ 23 Oct - 2 Nov 1973 (0.2 mm)

 --- --- ____8d ___ (none 7d+) ___________ 16-23 Nov 1973 (0.2 mm)

_16d ___ 17d ___ 26 Mar -10 Apr 1974 __25 Mar -10 Apr 1974 (0.1 mm) __ 5.4 mm 11th-12th then interval below

_10d ___ 12d ___ 13-22 Apr 1974 _______ 13-24 Apr 1974 (0.1 mm) 

 --- --- ___ 7d ___ (none 7d+) ___________ 18-24 Aug 1974 (0.2 mm) __ 25.6 mm 25th-26th

_ 7d ____ 9d ___ 3-9 Feb 1975 __________ 1-9 Feb 1975 (0.1 mm)

_10d ___10d ___ 5-14 Jun 1975 _________ 5-14 Jun 1975 ( zero )

_14d ___16d ___ 20 Jun -3 Jul 1975 _____ 18 Jun -3 Jul 1975 (0.3 mm) 

_10d ___10d ___ 25 Jul -3 Aug 1975 ____ 25 Jul -3 Aug 1975 ( zero )

 --- --- ___12d ___ (none 7d+) ___________ 19-30 Oct 1975 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 3-9 Dec 1975 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 1-7 Mar 1976 (0.2 mm) __ 5.1 mm 13 Feb -10 Mar (27d)

_12d ___16d ___ 15-26 Apr 1976 _______ 15-30 Apr 1976 (0.1 mm)  

_ 9d ___ 12d ___ 6-14 Jun 1976 _________ 3-14 Jun 1976 (0.3 mm)

_13d ___14d ___ 20 Jun -2 Jul 1976 _____ 19 Jun -2 Jul 1976 (0.1 mm) __ hot, rather dry to 11th

_22d ___24d ___ 4-25 Aug 1976 ________ 4-27 Aug 1976 (0.4 mm) __ 7.2 mm 18 Jul - 27 Aug (41 days) then 38.4 mm 28-30 Aug  

_18d ___20d ___ 17 May -3 Jun 1977 ____15 May -3 Jun 1977 (0.5 mm)

 --- --- ___15d ___ (none 7d+) ___________ 2-16 Jul 1977 (0.4 mm)

_15d ___ 16d ___ 16-30 May 1978 ______ 16-31 May 1978 (0.2 mm)

_ 8d ____ 8d ____ 9-16 Jul 1978 __________ 9-16 Jul 1978 ( zero )

_10d ___10d ___ 14-23 Sep 1978 _______ 14-23 Sep 1978 ( zero )

_ 9d ____17d ___ 3-11 Nov 1978 ________ 26 Oct -11 Nov 1978 (0.5 mm) __ 1.7 mm 18 Oct - 11 Nov (25d)

_11d ___24d ___ 26 Jun - 6 Jul 1979 _____ 26 Jun - 19 Jul 1979 (0.7 mm)

_ 7d ____13d ___ 10-16 Sep 1979 _______ 4-16 Sep 1979 (0.4 mm)

_ 7d ____ 7d ____ 27 Feb -4 Mar 1980 ___ 27 Feb -4 Mar 1980 ( zero )

_ 7d ____10d ___ 9-15 Apr 1980 _________ 9-18 Apr 1980 (0.1 mm) __ 0.7 mm 3-18 Apr (16d)

_ 11d ___18d ___ 8-18 May 1980 ________ 1-18 May 1980 (0.3 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 21-27 Aug 1980 (0.1 mm)

 --- --- ___ 8d ___ (none 7d+) ____________ 11-18 Feb 1981 (0.2 mm)

 --- --- ___ 9d ___ (none 7d+) ____________ 13-21 Apr 1981 (0.2 mm) __ 62 mm then fell 22-26 Apr incl three daily records

_ 7d ____ 7d ____10-16 Aug 1981 _______ 10-16 Aug 1981 ( zero )

 --- --- ___14d ___ (none 7d+) ___________ 24 Aug - 6 Sep 1981 (0.3 mm) __ 5.6 mm fell 17-23 Aug between previous and this interval

 --- --- ___ 7d ___ (none 7d+) ____________ 4-10 Nov 1981 (0.1 mm) __ 0.5 mm 31 Oct - 10 Nov (11d)

 --- --- ___ 7d ___ (none 7d+) ____________ 9-15 Jan 1982 (0.1 mm) __ very cold

 --- --- ___ 7d ___ (none 7d+) ____________ 22-28 Mar 1982 (0.1 mm)

_12d ___19d ___ 10-21 Apr 1982 _______ 10-28 Apr 1982 (0.1 mm)

_ 7d ____ 7d ____8-14 May 1982 ________ 8-14 May 1982 ( zero )

 --- --- ___14d ___ (none 7d+) ___________ 16-29 Jul 1982 (0.2 mm)

_11d ___ 12d ___ 7-17 Sep 1982 ________ 7-18 Sep 1982 (0.3 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 27 Nov -3 Dec 1982 (0.2 mm)

_ 8d ____11d ___ 16-23 Feb 1983 _______ 14-24 Feb 1983 (0.3 mm)

 --- --- ___ 8d ___ (none 7d+) ____________ 4 -11 Mar 1983 (0.1 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 4-10 Jun 1983 (0.2 mm) __ 2.3 mm 11th-14th then next interval

 --- --- ___ 7d ___ (none 7d+) ____________ 15-21 Jun 1983 (0.2 mm) __ 2.7 mm 4-21 June 1983 (18d)

_ 9d ____ 9d ____7-15 Jul 1983 __________ 7-15 Jul 1983 ( zero ) __ hot 

_12d ___ 13d ___4-15 Aug 1983 ________ 3-15 Aug 1983 (0.2 mm)

 --- --- ___ 8d ___ (none 7d+) ____________ 19 -26 Oct 1983 (0.2 mm) __ 1.0 mm 19 Oct-1 Nov (14d)

 --- --- ___ 7d ___ (none 7d+) ____________ 8 -14 Nov 1983 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 28 Nov -4 Dec 1983 (0.1 mm)

_12d ___ 12d ___ 8-19 Feb 1984 ________ 8-19 Feb 1984 ( zero )

 --- --- ___ 7d ___ (none 7d+) ____________ 14-20 Mar 1984 (0.1 mm)

_14d ___ 22d ___19 Apr -2 May 1984 __ 17 Apr -8 May 1984 (0.7 mm)

_ 8d ____ 8d ____9-16 Oct 1984 ________ 9-16 Oct 1984 ( zero )

 --- --- ___ 9d ___ (none 7d+) ____________10-18 Feb 1985 (0.1 mm) __ cold, 1.7 mm 10-27 Feb (18d)

_ 7d ____ 7d ____28 May -3 Jun 1985 ____28 May -3 Jun 1985 ( zero ) __ 40.0 mm 4-6 Jun

 --- --- ___ 7d ___ (none 7d+) ____________ 6-12 Jul 1985 (0.2 mm)

_10d ___ 10d ___ 22 Sep - 1 Oct 1985 __ 22 Sep - 1 Oct 1985 ( zero ) __ very warm 

_15d ___ 22d ___ 16-30 Oct 1985 _______ 9-30 Oct 1985 (0.2 mm)

 (cold spell 9 Feb to 2 Mar 1986 did not qualify but had only 2.3 mm in that 22 day interval)

_ 9d ___ 10d ___ 12-20 Jun 1986 ________ 12-21 Jun 1986 (0.1 mm)

_ 7d ____ 7d ___ 25 Jun -1 Jul 1986 ______ 25 Jun -1 Jul 1986 ( zero )

_ 9d ____ 9d ___ 4-12 Sep 1986 _________ 4-12 Sep 1986 ( zero ) __ 13.1 mm 13th Sep record for date

_16d ___23d ___ 18 Sep -3 Oct 1986 ____ 16 Sep -8 Oct 1986 (0.5 mm) __ 3.0 mm 14th Sep - 13th Oct (30d)

 (14-31 Jan 1987 following extreme cold and snow, had only 2.5 mm in that 18 day interval)

 --- --- ___ 7d ___ (none 7d+) ____________ 8-14 Mar 1987 (0.1 mm)

_ 8d ____ 8d ___ 21-28 Apr 1987 ________ 21-28 Apr 1987 ( zero )

_ 9d ___ 10d ___ 30 Jun -8 Jul 1987 ______ 29 Jun -8 Jul 1987 (0.2 mm)

_ 7d ____ 7d ___ 1-7 Nov 1987 ___________1-7 Nov 1987 ( zero )

 --- --- ___ 7d ___ (none 7d+) ____________ 16-22 Feb 1988 (0.2 mm)

_ 7d ___ 10d ___ 10-16 Jun 1988 ________ 10-19 Jun 1988 (0.2 mm)

_ 7d ____ 8d ___ 3-9 Sep 1988 ___________ 2-9 Sep 1988 (0.2 mm)

 --- --- ___ 7d ___ (none 7d+) ____________ 14-20 Sep 1988 (0.1 mm)

 --- --- ___11d ___ (none 7d+) ____________28 Oct -7 Nov 1988 (0.2 mm)

_ 7d ____ 9d ____27 Dec 1988 -2 Jan 1989 __27 Dec 1988 -4 Jan 1989 (0.1 mm)

_ 8d ____ 9d ____2 -9 May 1989 __________1 -9 May 1989 (0.2 mm)

_11d ___ 12d ___10-20 Jun 1989 _________ 9-20 Jun 1989 (0.2 mm) __ hot

_11d ___ 18d ___11-21 Jul 1989 __________11-28 Jul 1989 (0.5 mm) __ hot, 0.9 mm 9-28 Jul (20d)

_ 8d ____ 8d ___ 1-8 Aug 1989 ___________ 1-8 Aug 1989 ( zero )

_ 7d ____ 8d ___ 17-23 Aug 1989 _________16-23 Aug 1989 (0.2 mm)

 --- --- ___ 7d ___(none 7d+) ______________27 Sep -3 Oct 1989 (0.2 mm) __ 0.6 mm 23 Sep - 4 Oct (12d)

( 11 Nov - 10 Dec 1989 had only 3.8 mm (30d), well below the November 1945 record of 17.0 mm, turned very wet the following two weeks )

_ 7d ____ 7d ___ 2-8 Mar 1990 ___________ 2-8 Mar 1990 ( zero )

 --- --- ___ 8d ___(none 7d+) ______________4-11 Apr 1990 (0.1 mm)

_ 9d ____ 9d ___ 27 Apr - 5 May 1990 ____ 27 Apr - 5 May 1990 ( zero ) __ very warm

_12d ___13d ___17-28 May 1990 _________16-28 May 1990 (0.1 mm)

_ 7d ____ 7d ___ 10-16 Jun 1990 __________ 10-16 Jun 1990 ( zero )

 --- --- ___ 7d ___ (none 7d+) ______________8-14 Jul 1990 (0.1 mm) __ 1.7 mm 15th then next interval

_11d ___ 11d ___16-26 Jul 1990 __________ 16-26 Jul 1990 ( zero )

 ( 31 Jul to 13 Aug 1990 hot, 1.0 mm over 14 days, no intervals qualified .. 0.8 mm on 6th ... due to heat this could be considered very dry)

_ 8d ____ 8d ___ 8-15 Sep 1990 __________ 8-15 Sep 1990 ( zero )

___________________________

* as 21 Aug to 6 Sep 1972 qualifies and 11 Aug to 6 Sep is within 1 day or 0.1 mm less for qualifying, this is very close to a 27d interval. 29.3 mm fell 7-8 Sep. 

 

 

 

Edited December 18, 2022 by Roger J Smith

[Roger J Smith]

CEP dry spells (continued) __ 1991 to 2022 __ see second previous post for protocols (this is part 3 of 3)

 

ADS ___ EDS ___ Duration of ADS __ Duration of EDS and amount _ Notes

_ 7d ___ 13d ___24-30 Jan 1991 _____19-30 Jan 1991 (0.2 mm) __ very cold, 2.1 mm 19 Jan - 6 Feb (19d) then "blizzard of 91"

_ 8d ____ 9d ___23-30 Mar 1991_____23-31 Mar 1991 (0.1 mm) 

--- --- ____ 8d___ (none 7d+) ________ 8-15 Apr 1991 (0.1 mm)

--- --- ____ 9d___ (none 7d+) ________ 18-26 May 1991 (0.2 mm) __ 17 May -1 Jun 0.7 mm, 4 May -1 Jun 5.8 mm (28d)

_21d ___21d___24 Aug -13 Sep 1991__ 24 Aug -13 Sep 1991 ( zero )

_14d ___18d ___1-14 Dec 1991 ______27 Nov-14 Dec 1991 (0.5 mm) __ 2.0 mm 20 Nov -14 Dec (25d)

 --- --- ___10d___ (none 7d+) ________ 24 Dec 1991 -2 Jan 1992 (0.2 mm)

( 13-24 Jan 1992 (12d) had 0.4 mm all on day 7 (19th), fails to qualify by 0.1 mm or 1 day) _ 4.0 mm 25th then next interval ..

--- --- ____ 7d___ (none 7d+) ________ 26 Jan - 1 Feb 1992 (0.2 mm)

_ 7d ____11d ___16-22 May 1992 ___ 12-22 May (0.3 mm) __ very warm 

_ 8d ____ 9d ___ 11-18 Jun 1992 ____ 10-18 Jun 1992 (0.2 mm) __ 5.0 mm 19th then next interval ...

_ 9d ____ 9d ___ 20-28 Jun 1992 _____20-28 Jun 1992 ( zero ) 

_ 7d ____15d __27 Dec 1992 -2 Jan 1993 _ 19 Dec 1992 -2 Jan 1993 (0.3 mm)

 ( 29 Jan - 24 Feb 1993 (27d) had only 4.0 mm, failed to qualify, closest was 0.5 mm for 8d )

--- --- ____11d___ (none 7d+) ________ 27 Apr - 7 May 1993 (0.3 mm)

_12d ___ 12d ___ 26 Jun -7 Jul 1993 __26 Jun -7 Jul 1993 ( zero ) __ 1.5 mm 19 Jun -7 Jul (19d)

--- --- ____ 8d ___ (none 7d+) ________ 26 Aug - 2 Sep 1993 (0.1 mm)

_ 7d ____ 8d ____27 Apr -3 May 1994_ 26 Apr -3 May 1994 (0.1 mm)

--- --- ____ 7d ___ (none 7d+) ________  16-22 Jul 1994  (0.1 mm)

--- --- ____11d ___ (none 7d+) ________ 4-14 Oct 1994 (0.3 mm)

_ 9d ____11d ___ 23 Nov -1 Dec 1994 _ 21 Nov -1 Dec 1994 (0.2 mm) __ very mild

_ 9d ____17d ___ 31 Mar -8 Apr 1995 _ 31 Mar -16 Apr 1995 (0.4 mm)

_11d ___13d ___ 26 Apr -6 May 1995 _ 26 Apr - 8 May 1995 (0.4 mm) __ 26 Apr -15 May (20d) 1.8 mm

_14d ___15d ___ 18 Jun -1 Jul 1995 ____17 Jun -1 Jul 1995 (0.1 mm) __ 1.7 mm 2 Jul then next interval ..

_ 7d ____ 7d ____3-9 Jul 1995  _________ 3-9 Jul 1995 ( zero ) __ 13 Jun - 9 Jul (27d) 2.9 mm 

16, 9d __35d ___(1) 27 Jul -11 Aug 1995 (only 0.1 mm on 12th, then ... (during extreme heat)

_ _ _ _ _ _ _ _ _ _ _(2) 13-21 Aug 1995 ___18 Jul - 21 Aug 1995 (1.0 mm) __ 1.4 mm to 22nd

_ 8d ____ 8d ___ 8-15 Oct 1995  ________ 8-15 Oct 1995 ( zero ) __ 0.6 mm 16th then ...

 --- --- ___ 7d ___ (none 7d+) ___________ 17-23 Oct 1995 (0.2 mm) __ __ 8-23 Oct (16d) 0.8 mm, 0.6 mm 16th

 ( 27 Oct - 7 Nov 1995 (12d) had only 0.6 mm, failed to qualify due to 0.5 mm on 1st Nov )

 ( 12 Jan - 4 Feb 1996 (24d) had only 6.5 mm, failed to qualify, closest was 0.3 mm for 7d )

 --- --- ___10d ___ (none 7d+) ___________ 30 Mar - 8 Apr 1996 (0.3 mm) __ 24 Mar -9 Apr (17d) 1.4 mm

 ( 2 -10 May 1996 (9d) had only 0.3 mm, failed to qualify by 0.1 mm or one day )

_14d ___ 14d ___ 12-25 Jun 1996 _______12-25 Jun 1996 ( zero )

_10d ___ 11d ___ 12-21 Jul 1996 ________12-22 Jul 1996 (0.1 mm) __ 6 -22 Jul (17d) 1.6 mm

 --- --- ___ 8d ___ (none 7d+) ___________ 12-19 Aug 1996 (0.1 mm)

 ( 30 Aug - 23 Sep 1996 (25d) had only 6.1 mm, failed to qualify, closest was 0.7 mm for 8d )

 ( 3-16 Jan 1997 (14d) had only 1.6 mm, failed to qualify, closest was 0.7 mm for 7d, also only 2.0 mm 23 Jan - 2 Feb )

_ 8d ___ 20d ___ 6-13 Apr 1997 _________ 29 Mar - 17 Apr 1997 (0.5 mm) __ 25 Mar - 23 Apr (30d) 2.5 mm

 _13d __ 15d ___ 23 May -4 Jun 1997 ____ 21 May -4 Jun 1997 (0.4 mm)

_ 8d ____ 8d ____2-9 Aug 1997 ___________2-9 Aug 1997 ( zero )

 --- --- ___ 9d ___ (none 7d+) _____________ 20-28 Sep 1997 (0.1 mm)

_ 8d ____ 9d ___ 8-15 Feb 1998 __________ 7-15 Feb 1998 (0.1 mm) __ 20 Jan -20 Feb 1998 (31d) had only 4.9 mm

_10d ___11d ___13-22 Mar 1998 ________ 13-23 Mar 1998 (0.3 mm)

 --- --- ___ 8d ___ (none 7d+) ____________ 12-19 May 1998 (0.1 mm)

 --- --- ___ 7d ___ (none 7d+) _____________ 1-7 Jul 1998 (0.2 mm)

_10d ___ 10d ___ 4-13 Aug 1998 _________ 4-13 Aug 1998 ( zero )

( 16-28 Sep 1998 (13d) only 1.7 mm, failed to qualify, closest was 0.3 mm in 7d )

 --- --- ____ 7d ___ (none 7d+) ____________ 13-19 Mar 1999 (0.2 mm)

_ 8d ____ 8d ___ 27 Apr - 4 May 1999 ____ 27 Apr - 4 May 1999 ( zero )

_ 8d ____ 8d ___ 23-30 Jul 1999 __________ 23-30 Jul 1999 ( zero )

_ 8d ___ 10d ___ 27 Aug -3 Sep 1999 ____ 27 Aug -5 Sep 1999 (0.2 mm) 

 --- --- ___11d ___(none 7d+) _____________ 9 -19 Oct 1999 (0.2 mm)

 --- --- ___ 8d ___ (none 7d+) _____________ 15-22 Mar 2000 (0.2 mm) __ 4-22 Mar (19d) 2.6 mm

 --- --- ___ 8d ___ (none 7d+) _____________ 4-11 May 2000 (0.2 mm) __  29 Apr -11 Mar (13d) 1.1 mm

 --- --- ___10d ___ (none 7d+) _____________16-25 Jul 2000 (0.2 mm)

( 5-20 Jan 2001 (16d) only 2.6 mm, failed to qualify, closest was 0.3 mm in 7d )

_ 8d ____ 8d ___ 18-25 May 2001 ________ 18-25 May 2001 ( zero ) __ 18 May - 5 Jun (19d) 4.1 mm

 --- --- ___ 8d ___ (none 7d+) _____________ 18-25 June 2001 (0.2 mm)

_ 8d ___ 12d ___ 22-29 Jul 2001 __________ 21 Jul - 1 Aug 2001 (0.3 mm)

 --- --- __ 10d ___ (none 7d+) _____________ 2-11 Apr 2002 (0.3 mm) __ 21 Mar -24 Apr 2002 (35d) 3.0 mm

 --- --- __ 11d ___ (none 7d+) _____________ 10-20 Sep 2002 (0.3 mm) __ after 18.9 mm record daily on 9th, 6.3 mm total to 10 Oct (31d)

( 12-27 Feb 2003 (16d) total of 1.2 mm, failed to qualify, 0.3 or 0.4 mm in 7d twice )

 --- --- ___ 8d ___ (none 7d+) _____________ 23-30 Mar 2003 (0.2 mm) __ 12-30 Mar (19d) 1.1 mm __ 3.9 mm 31st-1st Apr then ..

 --- --- ___13d ___(none 7d+) _____________11-23 Apr 2003 (0.4 mm) __ 2-23 Apr (22d) 2.0 mm (7.0 mm 12 Mar -23 Apr, 43d)

_ 8d ____ 8d ___ 8-15 Jul 2003 ___________ 8-15 Jul 2003 ( zero )

 --- --- ___ 8d ___ (none 7d+) _____________ 2-8 Aug 2003 (0.2 mm) __ very hot, also 0.3 mm in 9d 12-20 Aug, 5.3 mm 2-27 Aug (26d)

_ 7d ____ 8d ___ 12-18 Sep 2003 ________ 12-19 Sep 2003 (0.2 mm) 

_10d ___ 12d ___10-19 Oct 2003 ________ 8-19 Oct 2003 (0.1 mm)

 --- --- ___ 8d ___ (none 7d+) _____________11-18 May 2004 (0.2 mm) __ 10-28 May (19d) 3.0 mm

_ 7d ____10d ___ 31 Aug - 6 Sep 2004 ____31 Aug - 9 Sep 2004 (0.1 mm) 

 --- --- ___10d ___ (none 7d+) ____________ 4-13 Dec 2004 (0.3 mm) __ 29 Nov -15 Dec 2004 (17d) 1.7 mm

( 2005 did not produce a qualifying dry spell despite numerous 5-6 day dry intervals; closest to qualifying was 0.5 mm in 7d 8-14 Dec)

_ 8d ____10d ___ 30 Jan - 6 Feb 2006  ___ 28 Jan - 6 Feb 2006 (0.2 mm) 

( 2-10 Jun 2006 (9d) total of 0.3 mm, failed to qualify by 0.1 mm or 1 day )

 --- --- ____ 8d ___ (none 7d+) ____________11-18 Jul 2006 (0.2 mm)

 --- --- ____ 7d ___ (none 7d+) ____________27 Jan -2 Feb 2007 (0.1 mm)

 --- --- ____ 7d ___ (none 7d+) ____________ 9 -15 Mar 2007 (0.1 mm)

_ 9, 7d __20d ___3-11 and 15-21 Apr 2007 _ 3-22 Apr 2007 (0.6 mm) __ 23 Mar - 22 Apr 2007 (31d) 3.3 mm

 --- --- ____ 9d ___ (none 7d+) ____________27 Apr - 5 May 2007 (0.1 mm)

_12d ___ 13d ___ 4-15 Sep 2007 _________3-15 Sep 2007 (0.2 mm)

( 17 Oct - 3 Nov 2007 (22d) total of 4.2 mm, failed to qualify, many readings of 0.1 mm a day )

( 11-21 Dec 2007 (11d) had 0.7 mm, failed to qualify, 0.3 mm 14-21 Dec )

( 6-23 Feb 2008 (18d) total of 1.5 mm, failed to qualify, 0.5 mm lowest 7d amounts )

 --- --- ___10d ___ (none 7d+) ____________ 5 -14 May 2008 (0.1 mm) __ very warm

 --- --- ___ 8d ____(none 7d+) ____________13-20 Sep or 14-21 Sep 2008 (0.2 mm) __ 9d 0.3 mm 

 --- --- ___10d ___ (none 7d+) ___________ 22-31 Dec 2008 (0.3 mm) __ cold, 4.6 mm 15 Dec - 3 Jan 2009 (20d)

 --- --- ___10d ___ (none 7d+) ___________ 13-22 Mar 2009 (0.3 mm)

 --- --- ___ 7d ____ (none 7d+) ___________ 17-23 Apr 2009 (0.1 mm)

_ 8d ____ 9d ____ 28 May -4 Jun 2009 ___ 27 May -4 Jun 2009 (0.2 mm)

 --- --- ___17d ____(none 7d+) ___________ 16 Sep -2 Oct 2009 (0.5 mm) __ 3 Sep - 4 Oct (32d) 2.9 mm

( 1-18 Mar 2010 (18d) had 4.4 mm, failed to qualify, 1.1 mm 1-10 Mar )

 --- --- ___10d ___ (none 7d+) ____________ 8-17 Apr 2010 (0.1 mm) __ 4-23 Apr 2010 (20d) 1.9 mm

_ 8d ____ 8d ____ 18-25 May 2010 _______ 18-25 May 2010 ( zero ) __ 9-25 May 2010 (17d) 1.8 mm

_ 8d ____ 8d ____ 20-27 Jun 2010 _______ 20-27 Jun 2010 ( zero ) __ 14 Jun - 10 Jul (27d) 4.1 mm (2-10 Jul 0.3 mm)

_ 8d ___ 12d ____ 18-25 Mar 2011 ______ 14-25 Mar 2011 (0.3 mm) __ 1-29 Mar 2011 (29d) 3.7 mm

_10d___ 18d ____ 12-21 Apr 2011 _______ 5-22 Apr 2011 (0.3 mm) __ 2.2 mm 23rd, then next interval ..

_12d ___ 12d ____24 Apr - 5 May 2011 __24 Apr - 5 May 2011 ( zero ) __ very warm, 5 Apr - 5 May (31d) 2.5 mm

 --- --- ___10d ___ (none 7d+) ____________23 Jul -1 Aug 2011 (0.2 mm)

 --- --- ___ 9d ___ (none 7d+) _____________26 Sep - 4 Oct 2011 (0.2 mm) __ very warm

 --- --- ___ 7d ___ (none 7d+) _____________12-18 Nov 2011 (0.2 mm)

 --- --- ___ 8d ___ (none 7d+) _____________ 8-15 Mar 2012 (0.2 mm)

_ 8d ____14d ___ 25 Mar - 1 Apr 2012 ___19 Mar - 1 Apr 2012 (0.2 mm) __ warm

_10d____11d ___19-28 May 2012 _______ 19-29 May 2012 (0.2 mm) __ very warm

_ 8d ____ 8d ____ 21-28 Jul 2012 _________ 21-28 Jul 2012 ( zero )

_ 8d ____ 9d ____ 1-8 Sep 2012 ___________1-9 Sep 2012 (0.1 mm)

 --- --- ___8d ____(none 7d+) ______________15-22 Feb 2013 (0.2 mm) __ 14 Feb - 5 Mar (20d) 1.8 mm

_10d____17d ___31 Mar - 9 Apr 2013 ____24 Mar - 9 Apr 2013 (0.4 mm) __ very cold

_10d____12d ___31 May - 9 Jun 2013 ____30 May - 11 Jun 2013 (0.2 mm)

_10d____19d ___ 3 -12 Jul 2013 __________3-21 Jul 2013 (0.4 mm) __ hot, 18.4 mm 22nd-23rd

_ 8d ____11d ___ 28 Aug - 4 Sep 2013 ___25 Aug - 4 Sep 2013 (0.3 mm)

( 20-30 Sep 2013 .. 11d .. 0.6 mm, failed to qualify )

 --- --- ___10d ___ (none 7d+) _____________ 8-17 Mar 2014 (0.3 mm)

 --- --- ___11d ___ (none 7d+) _____________ 8-18 Apr 2014 (0.1 mm)

 --- --- ___ 7d ___ (none 7d+) ______________15-21 Jun 2014 (0.2 mm) 

_ 7d _____ 7d ____7-13 Sep 2014 __________7-13 Sep 2014 ( zero ) __ 2-18 Sep (17d) 2.4 mm

 --- --- ___ 8d ____ (none 7d+) _____________ 16-23 Apr 2015 (0.1 mm)

 --- --- ___13d ___ (none 7d+) ______________11-23 Mar 2016 (0.4 mm)

 --- --- ___ 7d ____ (none 7d+) _____________ 11-17 Aug 2016 (0.2 mm)

 --- --- ___ 7d ____ (none 7d+) _____________ 5 -11 Apr 2017 (0.1 mm) __ 1-13 Apr 0.8 mm

 --- --- ___ 7d ____ (none 7d+) _____________ 4-10 May 2017 (0.2 mm)

 --- --- ___ 8d ____ (none 7d+) _____________ 11-18 Jun 2017 (0.2 mm) __ 10-26 Jun (17d) 2.3 mm, 32.8 mm 27-28 Jun

_ 8d ____11d ___ 16-23 May 2018 ________ 13-23 May 2018 (0.1 mm) __ 13.4 mm 24 May (daily record)

_23d ____29d ___18 Jun - 10 Jul 2018 ____ 17 Jun - 15 Jul 2018 (0.6 mm) __ hot, 8 Jun - 25 Jul (48d) 5.6 mm

_ 7d ____ 7d ____ 31 Jul -6 Aug 2018 ______31 Jul -6 Aug 2018 ( zero )

 --- --- ___7d ____ (none 7d+) _____________ 24-30 Sep 2018 (0.1 mm)

 --- --- ___7d ____ (none 7d+) _____________ 18-24 Oct 2018 (0.2 mm)

( 24 Dec 2018 - 15 Jan 2019 .. 23d .. 3.0 mm, failed to qualify  )

( 11-27 Feb 2019, very mild, 2.1 mm, failed to qualify  )

--- --- ___13d ___ (none 7d+) ______________19-31 Mar 2019 (0.2 mm)

_ 7d ___ 15d ___ 17-23 Apr 2019 _________ 9-23 Apr 2019 (0.4 mm)

_ 9d ____ 9d ___ 26 Jun - 4 Jul 2019 ______ 26 Jun - 4 Jul 2019 ( zero )

 --- --- ___ 7d ___ (none 7d+) ______________ 20-26 Aug 2019 (0.1 mm)

_ 7d ____ 8d ____21-27 Mar 2020 _________ 20-27 Mar 2020 (0.2 mm)

_ 7d ____ 8d ____17-23 Apr 2020 _________ 17-24 Apr 2020 (0.1 mm) __ 20 Mar - 24 Apr (36d) 6.9 mm 

_ 7, 9d _ 22d ___14-20 May 2020, 24 May-1 Jun __11 May - 1 Jun 2020 (0.7 mm) 

( 28 Jul - 10 Aug, hot (14d), 2.9 mm, failed to qualify )

 --- --- ___15d ___(none 7d+) ________________7-21 Sep 2020 (0.4 mm)

_ 7d ____ 8d ___ 28 Mar - 3 Apr 2021 ______ 27 Mar - 3 Apr 2021 (0.1 mm)

_11d ___ 15d ___16-26 Apr 2021 ___________12-26 Apr 2021 (0.4 mm) __ 2.6 mm 27 Mar - 26 Apr (31d) 

_ 8d ____ 8d ___ 8-15 Jun 2021 _____________ 8-15 Jun 2021 ( zero )

 --- --- ___7d ___ (none 7d+) ________________ 13-19 Jul 2021 (0.1 mm)

_ 7d ____ 7d ___ 1-7 Sep 2021 ______________ 1-7 Sep 2021 ( zero ) __ 23 Aug - 7 Sep (16d) 1.3 mm

_ 7d ____11d ___ 23-29 Jan 2022 ____________ 19-29 Jan 2022 (0.3 mm) __ 11 Jan -2 Feb (23d) 3.3 mm

 --- --- __ 11d ___ (none 7d+) ________________ 17-27 Mar 2022 (0.3 mm) __ 17.7 mm 16th

_10d ____11d ___ 20-29 Apr 2022 ____________20-30 Apr 2022 (0.3 mm)

 --- --- ___ 8d ___ (none 7d+) _________________ 9-16 Jun 2022 (0.2 mm)

_ 9d ____ 16d ___ 4-12 Jul 2022 ______________ 4-19 Jul 2022 (0.5 mm) __ very hot 

_ 9d ____ 10d ___ 6-14 Aug 2022 ____________ 5-14 Aug 2022 (0.2 mm) __ hot

( Tables of extremes and other analysis to follow )

 

 

 

 

Edited December 18, 2022 by Roger J Smith

[Roger J Smith]

 

Longest Absolute and Extended Dry Spells (1931-2022) CEP series

 

Using the criteria outlined in the first of the three summaries above, these are the longest dry spells of each type. It should be noted that the precip rate of these "extended" dry spells is generally lower than that of even the driest calendar months which tend to be in the range of 4-15 mm. To qualify here, a 30-day month would require a total of 1.4 mm, and a 31-day month would require no more than 1.5 mm. Thus, this study has uncovered the existence of drier "months" than any of the following CEP dry months (many of which occurred before the daily CEP began in 1931, so the lists below could have even lower values then): 

JAN _ FEB _ MAR _ APR _ MAY _ JUN _ JUL _ AUG _ SEP _ OCT _ NOV _ DEC

6.1 __ 3.4 __ 3.4 __ 5.6 __ 5.5 __ 5.8 __ 9.8 __ 7.8 __ 3.7 __ 8.3 __14.0 _ 11.6

1880_1879_1929_2011_2020_1925_1911_1995_1959_1947_ 1945_ 1933

(note lower values in table below for intervals often mid-month to mid-month, and even outside the dry spell criteria employed, examples such as this one, 1.8 mm 14 Jun - 12 Jul 1949 for 29 days, considerably lower than either June or July monthly minima). 

Another example would be 11 Aug - 6 Sep (27 days) with only 0.9 mm, also 23 Mar to 22 Apr 2007 (31d) (3.0 mm) beat March and April above. More recently in 2021, only 2.6 mm fell from 27 Mar to 26 Apr (31d).

An important conclusion might be that so far the calendar has disguised the real outcome of dry "months" which can be lower than the calendar month records suggest.  

_____________________________

Rank __ Longest Absolute Dry Spells ______ Longest Extended Dry Spells

 

_ 01 ____ 25d __ 17 Feb - 13 Mar 1943 _____ 36d _ 6 Aug - 10 Sep 1947 (0.7 mm) 

_ 02 ____ 23d __ 18 Jun - 10 Jul 2018 _______ 35d __ 16 Feb - 22 Mar 1943 (0.6 mm)

_ 03 ____ 22d __ 4-25 Aug 1976 ____________ 35d __ 18 Jul  - 21 Aug 1995 (1.0 mm) 

_ 04 ____ 21d __ 24 Aug -13 Sep 1991 ______34d __ 20 Feb -25 Mar 1953 (0.8 mm)  

_ 05 ____ 19d __ 15 Jun -3 Jul 1949 _________ 31d __ 14 Aug -13 Sep 1959 (1.0 mm) 

_ 06 ____ 18d __ 17 May - 3 Jun 1977 _______30d __ 10 Apr - 9 May 1942 (0.9 mm)

_ 07 ____ 16d __ 25 May -9 Jun 1939 _______ 29d ___ 17 Jun -15 Jul 2018 (0.6 mm)  

_ 08 ____ 16d __ 26 Mar -10 Apr 1974 ______ 24d __ 28 Feb - 23 Mar 1938 (0.5 mm)

_ 09 ____ 16d __ 18 Sep - 3 Oct 1986 _______ 24d ___ 4-27 Aug 1976 (0.4 mm)

_ 10 ____ 16d __ 27 July -11 Aug 1995 ______  24d ___ 26 Jun -19 Jul 1979 (0.7 mm)

_ 11 ____ 15d __ 8-22 Aug 1947 _____________ 23d __ 18 May - 9 Jun 1939 (0.7 mm)

_ 12 ____ 15d __ 16-30 May 1978 ___________ 23d __ 15 Jun - 7 Jul 1941 (0.7 mm)  

_ 13 ____ 15d __ 16-30 Oct 1985 ____________ 23d __ 11 Aug - 2 Sep 1972 (0.6 mm)

_ 14 ____ 14d __ 19 Jun -2 Jul 1941 __________ 23d __ 16 Sep - 8 Oct 1986 (0.5 mm)

_ 15 ____ 14d __ 23 Apr - 6 May 1942 _______ 22d __ 2-23 Oct 1962 (0.3 mm)

_ 16 ____ 14d __ 19 Jul - 1 Aug 1955 ________ 22d __ 17 Apr - 8 May 1984 (0.7 mm) 

_ 17 ____ 14d __ 26 Sep - 9 Oct 1959 _______ 22d __ 9-30 Oct 1985 (0.2 mm)

_ 18 ____ 14d __ 22 Oct - 4 Nov 1971 _______ 22d __ 11 May - 1 Jun 2020 (0.7 mm)

_ 19 ____ 14d __ 20 Jun - 3 Jul 1975 _________ 21d __ 19 Sep - 9 Oct 1972 (0.2 mm)

_ 20 ____ 14d __ 19 Apr - 2 May 1984 _______ 21d __ 24 Aug -13 Sep 1991 ( zero )

_ 21 ____ 14d __ 1-14 Dec 1991 _____________ 20d __ 5-24 Feb 1934 (0.4 mm)

_ 22 ____ 14d __ 31 Mar -13 Apr 1995 _______20d __ 14 Jun - 3 Jul 1949 (0.3 mm)

_ 23 ____ 14d __ 12-25 Jun 1996 __________ 20d __ 15 May - 3 Jun 1977 (0.5 mm)

_ 24 ____ 13d __ 11-23 Oct 1962 ____________ 20d __ 29 Mar -17 Apr 1997 (0.3 mm)

_ 25 ____ 13d __ 21 Aug - 2 Sep 1972 ________20d __ 3-22 Apr 2007 (0.6 mm)

_ 26 ____ 13d __ 20 Jun -2 Jul 1976 __________ 19d __ 10-28 Apr 1982 (0.1 mm) 

_ 27 ____ 13d __ 23 May - 4 Jun 1997 ________19d __ 3-21 Jul 2013 (0.4 mm)

_ 28 ____ 12d __ 29 Jun -10 Jul 1934 _________ 18d __ 1-18 May 1980 (0.1 mm)

_ 29 ____ 12d __ 5-16 Apr 1938 ______________18d __ 11-28 Jul 1989 (0.5 mm)

_ 30 ____ 12d __ 28 Sep -9 Oct 1945 _________18d __ 27 Nov -14 Dec 1991 (0.5 mm)

_ 31 ____ 12d __ 24 Aug -4 Sep 1947 ________ 18d __ 5-22 Apr 2011 (0.3 mm)

_ 32 ____ 12d __ 28 May - 8 Jun 1951 ________17d __ 21 Jul - 6 Aug 1935 (0.2 mm) 

_ 33 ____ 12d __ 24 May - 4 Jun 1960 ________ 17d __ 13-29 Apr 1954 (0.5 mm)

_ 34 ____ 12d __ 15-26 Apr 1976 _____________17d __ 7-23 Mar 1973 (0.1 mm)

_ 35 ____ 12d __ 10-21 Apr 1982 _____________ 17d __ 25 Mar - 10 Apr 1974 (0.1 mm)

_ 36 ____ 12d __ 4-15 Aug 1983 ______________ 17d __ 26 Oct - 11 Nov 1978 (0.5 mm)

_ 37 ____ 12d __ 8-19 Feb 1984 ______________ 17d __ 31 Mar - 16 Apr 1995 (0.4 mm)

_ 38 ____ 12d __ 17-28 May 1990 ____________ 17d 16 Sep -2 Oct 2009 (0.5 mm) 

_ 39 ____ 12d __ 26 Jun - 7 Jul 1993 __________ 17d __ 24 Mar - 9 Apr 2013 (0.5 mm)

_ 40 ____ 12d __ 4-15 Sep 2007 ______________16d __ 17 Jun - 2 Jul 1942 (0.5 mm)

_ 41 ____ 11d __ 5-15 Feb 1934 ______________ 16d __ 18 Jun -3 Jul 1975 (0.3 mm) 

_ 42 ____ 11d __ 12-22 Aug 1949 _____________ 16d __ 15-30 Apr 1976 (0.1 mm) 

_ 43 ____ 11d __ 16-26 Apr 1951 _____________ 16d __16-31 May 1978 (0.2 mm)

_ 44 ____ 11d __ 2-12 May 1953 ______________ 16d __ 4-19 Jul 2022 (0.5 mm)

_ 45 ____ 11d __ 1-11 Oct 1953 _______________ 15d __ 16-30 Jul 1943 (0.3 mm)

_ 46 ____ 11d __ 11-21 Apr 1955 ______________ 15d __ 11-25 Aug 1949 (0.3 mm)

_ 47 ____ 11d __ 26 Nov - 6 Dec 1962 _________ 15d __ 25 Sep - 9 Oct 1959 (0.1 mm)

_ 48 ____ 11d __ 18-28 Sep 1966 ______________ 15d __ 3-17 Mar 1961 (0.3 mm)

_ 49 ____ 11d __ 25 Sep - 5 Oct 1972 __________ 15d __ 1-15 Apr 1971 (0.4 mm)

_ 50 ____ 11d __ 26 Jun - 6 Jul 1979 ____________15d __ 21 Oct - 4 Nov 1971 (0.2 mm)

_ 51 ____ 11d __ 8-18 May 1980 _______________ 15d __ 4-18 Jun 1973 (0.4 mm)

_ 52 ____ 11d __ 7-17 Sep 1982 ________________ 15d __ 2-16 Jul 1977 (0.4 mm)

_ 53 ____ 11d __ 10-20 Jun 1989 _______________ 15d __ 19 Dec 1992 - 2 Jan 1993 (0.3 mm)

_ 54 ____ 11d __ 11-21 Jul 1989 ________________ 15d __ 17 Jun -1 Jul 1995 (0.1 mm)

_ 55 ____ 11d __ 26 Apr - 6 May 1995 __________ 15d __ 21 May - 4 Jun 1997 (0.4 mm)

_ 56 ____ 11d __ 16-26 Apr 2021 _______________ 15d __ 19 Apr - 3 May 2019 (0.4 mm)

_________________________________________________ 15d __ 7-21 Sep 2020 (0.4 mm)

_________________________________________________ 15d __ 12-26 Apr 2021 (0.4 mm)

 

 

 

(ties are not indicated, as there are two lists side by side, and also equal values are listed chronologically, not separated by total amounts in the second list).

(note that absolute dry spells are based on rounded daily values all rounding to 0.0 mm but can include small amounts especially in second half of data, part of the reason for using the rounding protocol is that a lot of the first half of data years were all or mostly rounded values without a second decimal, so it would have distorted the distribution to assume that all those 0.0 amounts were also 0.00 mm. 

_______________________________________________________

Number of Days per year within Extended Dry Spells 

Decade ____ xxx0 __ xxx1 _xxx2 _xxx3 _xxx4 _xxx5 _xxx6 _xxx7 _xxx8 _xxx9 ___ avg

1930s ______ -- -- ___ 19 ___ 36 ___ 87 ___ 62 ___ 45 ___ 23 ___ 45 ___ 92 ___ 58 ____ 52

1940s _______ 45 ___ 46 ___ 77 ___ 84 ___ 30 ___ 27 ___ 37*___60 ___ 53 ___ 52 ____ 51

1950s _______ 43 ___ 32 ___ 24*___98 ___ 33 ___ 71 ___ 32 ___ 54 ____ 8 ___ 83 ____ 48

1960s _______ 27 ___ 71 ___ 76 ___ 17 ___ 60 ___ 29 ___ 46 ___ 39 ___ 36 ___ 40 ____ 44

1970s _______ 30 ___ 64 ___ 77 ___ 77 ___ 36 ___ 64 ___ 73 ___ 35 ___ 51 ___ 37 ____ 54

1980s _______ 42 ___ 45 ___ 73 ___ 77 ___ 49 ___ 55 ___ 49 ___ 32 ___ 48 ___ 66^____54

1990s _______ 70 ___ 86 ___ 43*___33 ___ 37 __ 102___ 43*___ 52 ___ 45 ___ 44 ____ 56

2000s _______ 26 ___ 28 ___ 21 ___ 57 ___ 28 ____ 0 ____ 8* ___ 56 ___ 28 ___ 43 ____ 30

2010s _______ 26 ___ 68 ___ 50 ___ 59 ___ 35 ____ 8 ____ 20 ___ 22 ___ 61 ___ 44 ____ 39

2020s _______ 53 ___ 45 ___ 67 

 

_______________________________

*1946 increases to 49 if we count one marginal 12d (0.4 mm) non-qualifier.

*1952 increases to 33 if we count one marginal 9d (0.3 mm) non-qualifier.

*1992 increases to 55 if we count one marginal 12d (0.4 mm) non-qualifier.

*1996 increases to 52 if we count one marginal 9d (0.3 mm) non-qualifier.

*2006 increases to 17 if we count one marginal 9d (0.3 mm) non-qualifier.

^1989 also had a dry 30d interval 11 Nov to 10 Dec (3.0 mm) which failed to qualify but was much drier than Nov 1945.

Various other years would also increase by 5-10 days not due to discrete non-qualifiers but extended versions of spells already in the count.

======================================

ANALYSIS

The frequency of dry spells by this measure was fairly constant from the 1930s to 1990s although quite variable year to year. The frequency dropped sharply in the wetter 2000-09 decade and stayed quite low to around 2017, but has since returned to its previous average of around 50-60 days a year. If the criteria are relaxed to a pace similar to top ten dry months, these numbers would all be somewhat higher but there does seem to be a cutoff in the length of dry spells after about 35 days. 

Most significant very warm or hot spells show up as dry spells or in some cases are just marginally outside the criteria and their warmth would make that marginal moisture very close to an absolute dry spell in any case (Aug 1990 for example). However, there are some cold spells such as Mar-Apr 2013 and Apr 2021 that are also quite dry. Although the general pattern is for an extended dry spell to form around the nucleus of an absolute dry spell, and within a less notable dry period, some of them end abruptly with a shift to very wet conditions (Apr 1981 for example), and others follow immediately after a wet spell. 

A study of the time of year more favoured by the dry spells would likely reveal that spring-summer was most frequent, autumn not quite as productive (in particular November), and winter generally a bit too active to generate the persistence of dry conditions required. 

Edited December 18, 2022 by Roger J Smith

[Roger J Smith]

Following is the frequency of extended dry spells (not including any identified as non-qualifying in the lists), by days of the year. 

Date / Months

::::: ...... JAN_ FEB_ MAR_ APR_ MAY_ JUN_ JUL_ AUG_ SEP_ OCT_ NOV_ DEC

01 ____ 05 ___ 07 ___ 12 ___ 12 ___ 15 ___ 16 ___ 20 ___ 14 ___ 17 ___ 16 ___ 05 ___ 08

02 ____ 05 ___ 06 ___ 12 ___ 13 ___ 16 ___ 15 ___ 21 ___ 11 ___ 17 ___ 15 ___ 05 ___ 06

03 ____ 03 ___ 05 ___ 12 ___ 14 ___ 16 ___ 16 ___ 21 ___ 12 ___ 15 ___ 14 ___ 04 ___ 08

04 ____ 03 ___ 07 ___ 12 ___ 13 ___ 16 ___ 17 ___ 20 ___ 12 ___ 19 ___ 17 ___ 07 ___ 08

05 ____ 03 ___ 07 ___ 07 ___ 15 ___ 16 ___ 13 ___ 17 ___ 12 ___ 19 ___ 15 ___ 06 ___ 07

06 ____ 03 ___ 07 ___ 07 ___ 15 ___ 14 ___ 13 ___ 18 ___ 13 ___ 20 ___ 15 ___ 06 ___ 05

07 ____ 03 ___ 06 ___ 09 ___ 16 ___ 15 ___ 13 ___ 17 ___ 11 ___ 22 ___ 15 ___ 06 ___ 05

08 ____ 04 ___ 07 ___ 13 ___ 20 ___ 15 ___ 13 ___ 17 ___ 12 ___ 21 ___ 17 ___ 05 ___ 04

09 ____ 05 ___ 05 ___ 14 ___ 23 ___ 14 ___ 13 ___ 16 ___ 10 ___ 21 ___ 20 ___ 05 ___ 04

10 ____ 05 ___ 05 ___ 16 ___ 24 ___ 12 ___ 15 ___ 15 ___ 09 ___ 18 ___ 16 ___ 05 ___ 03

11 ____ 04 ___ 06 ___ 18 ___ 24 ___ 14 ___ 15 ___ 17 ___ 12 ___ 17 ___ 13 ___ 03 ___ 03

12 ____ 03 ___ 06 ___ 18 ___ 23 ___ 15 ___ 18 ___ 18 ___ 14 ___ 18 ___ 13 ___ 03 ___ 02

13 ____ 02 ___ 08 ___ 23 ___ 24 ___ 12 ___ 17 ___ 17 ___ 14 ___ 16 ___ 12 ___ 03 ___ 02

14 ____ 02 ___ 09 ___ 25 ___ 25 ___ 12 ___ 19 ___ 17 ___ 14 ___ 14 ___ 11 ___ 03 ___ 02

15 ____ 01 ___ 08 ___ 24 ___ 26 ___ 11 ___ 19 ___ 15 ___ 13 ___ 12 ___ 11 ___ 04 ___ 01

16 ____ 01 ___ 09 ___ 20 ___ 26 ___ 13 ___ 18 ___ 16 ___ 12 ___ 13 ___ 09 ___ 05 ___ 01

17 ____ 01 ___ 10 ___ 21 ___ 24 ___ 13 ___ 19 ___ 15 ___ 11 ___ 12 ___ 08 ___ 05 ___ 02

18 ____ 01 ___ 11 ___ 19 ___ 23 ___ 16 ___ 22 ___ 16 ___ 11 ___ 12 ___ 10 ___ 05 ___ 02

19 ____ 04 ___ 09 ___ 21 ___ 21 ___ 15 ___ 20 ___ 17 ___ 11 ___ 12 ___ 11 ___ 03 ___ 03

20 ____ 04 ___ 09 ___ 20 ___ 22 ___ 15 ___ 21 ___ 14 ___ 12 ___ 12 ___ 09 ___ 03 ___ 03

21 ____ 04 ___ 09 ___ 20 ___ 23 ___ 16 ___ 17 ___ 17 ___ 15 ___ 09 ___ 09 ___ 04 ___ 03

22 ____ 05 ___ 10 ___ 22 ___ 21 ___ 15 ___ 14 ___ 15 ___ 14 ___ 09 ___ 10 ___ 04 ___ 04

23 ____ 05 ___ 09 ___ 22 ___ 19 ___ 14 ___ 16 ___ 15 ___ 16 ___ 09 ___ 11 ___ 04 ___ 04

24 ____ 04 ___ 08 ___ 20 ___ 14 ___ 15 ___ 16 ___ 16 ___ 18 ___ 10 ___ 08 ___ 03 ___ 04

25 ____ 05 ___ 07 ___ 20 ___ 12 ___ 16 ___ 16 ___ 17 ___ 18 ___ 11 ___ 07 ___ 04 ___ 03

26 ____ 06 ___ 08 ___ 17 ___ 13 ___ 15 ___ 18 ___ 17 ___ 19 ___ 12 ___ 08 ___ 04 ___ 03

27 ____ 07 ___ 10 ___ 20 ___ 16 ___ 14 ___ 17 ___ 16 ___ 18 ___ 15 ___ 06 ___ 06 ___ 04

28 ____ 08 ___ 11 ___ 17 ___ 17 ___ 16 ___ 19 ___ 16 ___ 17 ___ 15 ___ 07 ___ 08 ___ 04

29 ____ 07 ___ 03 ___ 15 ___ 15 ___ 15 ___ 20 ___ 14 ___ 17 ___ 13 ___ 07 ___ 08 ___ 05

30 ____ 06 ___ xx ___ 15 ___ 14 ___ 18 ___ 20 ___ 13 ___ 15 ___ 15 ___ 06 ___ 08 ___ 05

31 ____ 06 ___ xx ___ 14 ___ xx ___ 17 ___ xx ___ 12 ___ 15 ___ xx ___ 04 ___ xx ___ 05

____________________________________

(out of 92 years of data, except 29 Feb has 23 and its frequency should be x4 for comparison).

(alternatively, add 8 to the count for 29 Feb for non-leap year spells that included 28 Feb and 1 Mar)

 

ANALYSIS

There are two spring peaks of dry spell frequency in mid-March and mid-April. After that, the frequency slowly drops off to a minimum around mid-August, and rises again to peaks in September and October. The least frequent dry spell dates are in mid to late December and parts of January. 15-16 December in fact only took part in one dry spell (in 1991). The peak frequencies in the mid-20 range indicate that dry spells are quite common in spring, approaching one third of all years. 

 

[Roger J Smith]

Bumping to top for easier access ... records being broken in recent days, see tables for June mean and max (no warmest minimum values yet). 

[Roger J Smith]

This info belongs in the September CET contest thread and I will move it over there when forecast submission period ends. It is cross-posted at present to the August CET thread. 

September has only been warmest month of any year once, in 1890. Sep at 14.6 edged out July 14.5. 1865 came quite close with September (16.3) 0.3 behind July. 1729 (16.6) was only 0.2 lower than July. 

The highest daily CET mean has occurred in September 13 times, twice tying another earlier value (in the 251 years with daily data).

The change from CET legacy to v2.0 has not removed nor added to any of these, although some are revised up or down as shown. In fact only three annual CET max  daily means changed  month: 1878 moved from 20 July to 27 June, 1890 went from 5 Aug to 31 July, and 1903 from 9 July to 28 June and three years added a new tie in a different month while keeping the former sole record as part of the new tie (1915, 1919, 1941); also a small number of other years added or dropped ties on consecutive days in the years affected (1853 to 2021, data before 1853 was not altered other than the addition of daily data for Dec 1786, and there was no legacy data in summer 2022).

These are the years that saw a September annual maximum. 1985 is included in the list but had an October 1st maximum.

 

YEARS with MAX DAILY CET MEAN in SEP, OCT

YEAR _____ date ____  CET leg ___ CET v2.0 ____ (notes, values surpassed in September/October)

1780 _____ 1 Sep ____ 21.8 ______ 21.8 ________ 21.2 in May and two dates in July

1810 _____ 2 Sep ____ 20.5 ______ 20.5 ________ also 19.3 on 1st, 18.1 in Aug had been max

1823 ____ 14 Sep ____ 19.2 ______ 19.2 ______ tied 20 July 1823 19.2

1824 _____ 2 Sep _____21.1 ______ 21.1 _________20.5 in July

1880 _____ 4 Sep _____21.7 ______ 21.1 ________ 19.3 in Aug, 2nd to 5th Sep all beat or tied that (v2.0)

1889 ____ 12 Sep _____19.2 _____ 18.7 _________ 18.5 in July

1898 _____ 8 Sep _____ 21.3 _____ 21.6 _________ 21.3 22 August (v2.0)

1906 _____ 2 Sep _____ 22.6 _____ 22.3 _________ 19.9 22 Aug, 20.8 31 Aug, and 22.0 1 Sep (v2.0)

1908 _____30 Sep ____ 19.6 _____ 19.5 __________19.1 July, also 19.0 on 29 Sep (v2.0)

1913 ____ 27 Sep ____ 18.9 _____ 19.3 __________ 18.5 June, August

1949 _____ 5 Sep ____ 22.4 _____ 22.4 ___________ 21.4 June and 21.5 July

1954 _____ 1 Sep ____ 18.2 _____ 18.2 ___________ 17.7 27th May was not beaten until 17.9 31 Aug and 18.2 1st Sep (very cool summer)

1956 ____ 22 Sep ____ 18.7 _____ 18.7 ___ tied 8 July 1956 also 18.7

1985 _____ 1 Oct ____ 20.2 _____ 20.1 ____________ 19.8 on 25th July

__________________________

1895 came very close with 19.7 (27 Sep) not quite catching up to 19.9 (26 June) (v2.0 data).

Notable annual maxima in late August include 23.0 28 Aug 1942 and 21.6 30 Aug 1961. 

All the annual maxima can be seen in my CET thread in the historical weather forum (it is around end of page 2 of menu and these stats are on page one after daily records). 

As with the Junes that were warmest months, these September appearances have become dormant so perhaps this stat will wake up too, although it would need to overcome 21.7 on 12 June for this year, a value rarely seen in September. 

The highest value for September that was a daily record but not the annual maximum appears to be 21.4 (21st 2006 and 8th 2021), 21.3 (14th 2016) was close in that regard. 

_____________________________

Making an appearance at high daily mean does not guarantee a high daily maximum for the year. Of the 13 September cases above and near-miss 1895, we cannot compare the first four (no daily max, min until 1878) but of the rest of the ten cases, only four appear to have set a daily maximum for the year. Those were 1880 (27.4 4th Sep easily saw off 24.3 from 11 Aug, 2nd and 3rd were also warmer), 1898 (27.1 8th and 17th Sep edged out 26.7 from 12 Aug); 1906 easily (31.2 1st, 31.1 2nd surpassed 29.9 on 31 Aug and that had blown away various other days earlier in the mid 20s), and 1954 with 26.6 on 1 Sep well ahead of second place 23.8 on 12 May. 

1889 (23.9 vs 24.4 in Aug), 1895 (25.7 vs 26.8 in late May), 1908 (24.4 vs 27.4 in July), 1913 (24.0 vs 25.8 in June), 1949 (26.4 vs 30.2 in July) and 1956 (22.9 vs 24.0 in July) all failed to beat a previous high maximum so I think it's fair to say that warmer nights must do a lot of the work to get September days over the line as daily mean victors.

1st Oct 1985 (25.5) also failed to take high max away from 25 July at 26.0. ... 30 Sep (27.1) and 1 Oct 2011 (27.0) also could not quite match 27 June 27.8. 

 

Edited August 23, 2023 by Roger J Smith

[Roger J Smith]

Annual extremes of CET max and min 1878-2023

Using v2.0 data, these are the highest maxima and lowest minima of each calendar year, with lowest minima of winter seasons added. Winter seasons are arranged by winter seasons including the January to March of years they appear in, so they include previous Nov-Dec. 

* winter 1877-78 does not have data for Nov-Dec 1877.

YEAR _____ high MAX __ date _____ low MIN __ date ___ low winter MIN __ date

1878______ 29.4 ___ 26 June______ -11.8 ___ 25 Dec _____-3.8 ___ 24 Mar 1878^

1879______ 23.0 ___ 12 Aug ______ -11.0 ____ 7 Dec ____ -11.8 ___ 25 Dec 1878

1880______ 27.4 ____ 4 Sep _______ -8.2 ____20 Jan _____-11.0 ____ 7 Dec 1879

1881______ 28.9 ____ 5 July _______ -12.9 ___21 Jan _____-12.9 ___ 21 Jan 1881 

1882______ 24.1 ___ 12 Aug ______  -7.4 ____11 Dec _____-4.8 ___ 24 Dec 1881

1883______ 24.4 ____ 2 July _______  -6.7 ___ 24 Mar _____-7.4 ___ 11 Dec 1882

1884______ 29.3 ___ 11 Aug ______  -3.5 ___ 25 Nov _____ -2.5 14 Nov, 7 Dec 1883 (also -2.1 24 Apr 1884)

1885______ 28.7 ___ 26 July _______ -6.2 ___ 11 Dec _____ -4.6 ___ 21 Feb 1885 

1886______ 27.1 ____ 4 July _______ -10.0 ___ 7 Jan ______-10.0 ___ 7 Jan 1886

1887______ 28.1 ____ 3 July _______  -6.9 ____ 2 Jan ______ -7.5 ___ 20 Dec 1886

1888______ 26.5 ___ 25 June ______  -5.4 ____ 2 Feb _____ -5.4 ___ 17 Nov 1887 & 2 Feb 1888

1889______ 24.7 ___ 30 July ________ -6.1 ___ 12 Feb _____-6.1 ___ 12 Feb 1889

1890______ 23,5 ____ 5 Aug ________-11.7 ___ 22 Dec ____ -7.8 ___ 4 Mar 1890   

1891______ 25.8 ___ 10 Sep _______ -11.7 ___ 17 Jan _____-11.7___ 22 Dec 1890 & 17 Jan 1891

1892______ 25.5 ____ 9 June _______ -9.2 ____27 Dec _____ -9.0 ___ 19 Feb 1892

1893______ 29.0 ___ 18 Aug ________-8.2 ____ 5 Jan _______-9.2 ___ 27 Dec 1892

1894______ 27.4 ____ 1 July _______ -10.9 ____ 6 Jan ______-10.9 ____6 Jan 1894

1895______ 26.8 ___ 30 May ______ -13.7 ____ 8 Feb _____ -13.7 ____8 Feb 1895

1896______ 27.1 ___ 15 June _______ -4.2 ___ 26 Feb ______ -4.2 ___ 26 Feb 1896 (also -4.0 29 Oct 1895)

1897______ 28.6 ____ 4 Aug ________ -5.7 ___ 18 Jan _______ -5.7 ___ 18 Jan 1897 

1898______ 27.1 ___ 8 & 17 Sep ____ -3.6 ___ 21 Feb ______ -5.3 ___ 23 Dec 1897

1899______ 28.3 ___ 25 Aug ________ -8.5 ___ 14 Dec ______ -6.0 ___ 21 Mar 1899

1900______ 28.9 ___ 19 July ________ -8.8 ____ 8 Feb _______ -8.8 ____ 8 Feb 1900    

1901______ 29.4 ___ 19,20 July _____ -6.1 ___ 17 Nov ______ -5.1 ___ 29 Mar 1901    

1902______ 27.5 ___ 28 June _______ -9.1 ___ 13 Feb _______ -9.1 ___ 13 Feb 1902

1903______ 25.0 ___ 10 July ________ -6.0 ___ 29 Dec _______ -5.6 ___ 14 Jan 1903

1904______ 26.7 ___ 11 July ________ -7.8 ___ 24 Nov _______ -6.0 ___ 29 Dec 1903    

1905______ 26.0 ____ 8 July ________ -5.7 ___ 19 Jan ________ -7.8 ___ 24 Nov 1904     

1906______ 31.2 ____ 1 Sep ________ -4.8 ___ 27 Dec ________-3.0 ___ 22 Feb 1906    

1907______ 24.5 ___ 18 July ________ -6.9 ___ 25 Jan ________ -6.9 ___ 25 Jan 1907

1908______ 27.4 ____ 2 July ________ -9.5 ___ 30 Dec ________-6.9 ____ 5 & 12 Jan 1908

1909______ 26.4 ___ 15 Aug _______ -9.0 ____ 5 Mar ________ -9.5 ___ 30 Dec 1908

1910______ 25,2 ___ 20 June _______-9.0 ___ 27 Jan _________ -9.0 ___ 27 Jan 1910    

1911______ 30.9 ____ 9 Aug ________ -6.5 ____ 1 Feb ________ -6.5 ____ 1 Feb 1911

1912______ 29.2 ___ 15 July ________ -8.6 ____ 3 Feb ________ -8.6 ____ 3 Feb 1912 

1913______ 25.8 ___ 16 June _______ -4.5 ____31 Dec _______ -4.3 ____ 1 Dec 1912

1914______ 28.5 ___ 30 June _______ -4.6 ___ 24 Jan 1914 (also -4.5 31 Dec 1913)    

1915______ 25.3 ____ 8 June _______ -5.8 ___ 27 Nov ________-4.1 ___ 21 Nov 1914

1916______ 26.1 ____ 1 Aug ________ -5.2 ___ 16, 17 Dec ____ -5.8 ___ 27 Nov 1915    

1917______ 28.0 ___ 17 June _______-10.9 ____6 Feb _______ -10.9 ____6 Feb 1917

1918______ 26.6 ___ 22 May ________-6.1 ____ 9 Jan ________ -6.1 ____9 Jan 1918

1919______ 27.2 ___ 11 Sep ________ -8.1 ____ 9 Feb ________-8.1 ___ 9 Feb 1919

1920______ 24.9 ___ 25 May ________-7.6 ___ 13 Dec _______ -5.5 ___ 30 Nov 1919

1921______ 30.2 ___ 10 July ________ -4.8 ___ 9, 13 Nov ____ -7.6 ___ 13 Dec 1920

1922______ 27.0 ____ 1 June ________-6.0 ___ 6 Feb ________ -6.0 ___ 6 Feb 1922    

1923______ 31.0 ___ 12 July ________ -6.3 ___ 27 Nov ______  -3.2 ___ 25 Nov 1922

1924______ 28.5 ___ 12 July ________ -5.5 ___ 10 Jan _______ -6.3 ___ 27 Nov 1923    

1925______ 28.4 _ 11 Jun, 22 Jul ___ -5.9 ____ 4 Dec _______ -3.5 ___ 13 Mar 1925

1926______ 28.6 ___ 14 July ________ -9.0 ___ 17 Jan ________-9.0 ___ 17 Jan 1926    

1927______ 25.5 ___ 10 July ________ -7.0 ___ 19 Dec _______-5.2 ___ 11 Feb 1927

1928______ 26.1 ___ 15 July ________ -5.1 ____ 1 Jan ________-7.0 ___ 19 Dec 1927

1929______ 28.4 ___ 16 July ________-12.6 ___ 14 Feb ______-12.6 ___ 14 Feb 1929

1930______ 30.5 ___ 27 Aug ________ -7.3 ___ 20 Mar ______ -7.3 ___ 20 Mar 1930

1931______ 23.2 ____ 4 Aug ________ -5.4 ___ 10 Mar _______-5.8 ___ 17 Nov 1930

1932______ 30.3 ___ 19 Aug ________ -5.1 ___ 12 Mar _______-5.1 ___ 12 Mar 1932

1933______ 28.8 ___ 27 July ________ -6.0 ___ 23 Jan ________-6.0 ___ 23 Jan 1933

1934______ 28.9 ___ 11 July ________ -3.6 ___ 25 Jan ________-3.6 ___ 25 Jan 1934

1935______ 28.2 ___ 13 July ________ -8.4 ___ 23 Dec _______ -3.1 ___ 28 Jan 1935    

1936______ 27.4 ___ 20 June _______ -6.9 ___ 13 Feb ________-8.4 ___ 23 Dec 1935    

1937______ 27.5 ____ 5 Aug ________ -4.3 ___ 18 Dec _______ -3.4 ____ 8 Dec 1936

1938______ 26.3 ____ 1 Aug ________ -6.2 ___ 21 Dec _______ -4.3 ___ 18 Dec 1937

1939______ 28.4 ____ 6 June _______ -7.2 ___ 30 Dec _______ -6.2 ___ 21 Dec 1938

1940______ 28.2 ____ 9 June ______ -13.3 ___ 21 Jan _______-13.3 ___ 21 Jan 1940    

1941______ 29.6 ___ 21 June _______ -6.7 ___ 16 Jan ________-6.7 ___ 16 Jan 1941     

1942______ 29.8 ___ 28 Aug ________ -7.0 ___ 21 Jan ________-7.0 ___ 21 Jan 1942 

1943______ 30.9 ___ 31 July ________ -3.9 ___ 14 Dec _______ -3.7 ___ 23 Nov 1942

1944______ 28.9 ___ 29 May ________-5.2 ___ 26 Dec _______ -4.4 ___ 29 Feb 1944    

1945______ 26.2 ___ 14 July _______ -10.6 ___ 26 Jan ______ -10.6 ___ 26 Jan 1945     

1946______ 27.4 ___ 12 July ________ -8.1 ___ 21 Dec _______ -6.9 ___ 21 Jan 1946    

1947______ 30.0 ____ 2 June*______ -13.6 ___ 24 Feb ______ -13.6 ___ 24 Feb 1947

1948______ 31.5 ___ 29 July ________ -4.9 ___ 21 Feb ________-6.4 ____ 1 Dec 1947

1949______ 30.2 ___ 12 July ________ -5.1 ____ 4, 5 Feb ______-5.1 ___ 4, 5 Feb 1949

1950______ 29.9 ____ 6 June _______ -6.3 _____ 6 Dec ________-5.7 ___ 26 Jan 1950

________________________________________________

*also 29.2 16 Aug 1947 and 29.5 3 June, 28.6 29, 31 May

^ winter 1877-1878 no data before 1 Jan, lowest daily mean in missing portion was 0.8 on 25 Dec 1877, quite possible a lower min was associated.

================================

 

part two (1951-2023) to follow soon ...      

     

     

          

[Roger J Smith]

(part two)

Annual CET high maxima, low minima (incl winter seasons)

(1951-2023) _ updated to v2.0.1.0 data

 

YEAR _____ high MAX __ date _____ low MIN __ date ___ low winter MIN __ date

1951______ 25.3 ___ 21 July_______ -5.8 ___ 11 Dec _____-6.3 ____ 6 Dec 1950

1952______ 28.9 ____ 1 July _______ -8.2 ___ 27 Jan _____ -8.2 ___ 27 Jan 1952

1953______ 29.8 ___ 12 Aug ______ -4.5 ____ 5 Jan _____ -5.7 ___ 25 Nov 1952

1954______ 26.6 ____ 1 Sep _______-8.9 ____ 2 Feb _____ -8.9 ____ 2 Feb 1954

1955______ 28.1 ___ 22, 23 Aug __ -7.9 ___ 28 Feb _____ -7.9 ___ 28 Feb 1955 

1956______ 24.0 ___ 27 July ______-10.5 ____3 Feb _____-10.5 ___ 3 Feb 1956

1957______ 28.3__28 June, 6 July _-4.1 ____17 Dec _____-3.9 ___ 28 Dec 1956

1958______ 25.2 ___ 19 July ______ -7.3 ___ 24 Jan _____ -7.3 ___ 24 Jan 1958

1959______ 28.7 ____ 4 July ______ -7.0 ___ 16 Jan _____ -7.0 ___ 16 Jan 1959

1960______ 28.0 ____ 5 June _____ -4.7 ___ 14 Jan _____ -4.7 ___ 14 Jan 1960

1961______ 29.6 ___ 29 Aug ______-7.5 ___ 29 Dec _____-3.3 ___ 13 Dec 1960

1962______ 22.9 ____ 8 June _____ -8.7 ____ 2 Jan ______-8.7 ____ 2 Jan 1962

1963______ 26.8 ___ 30 July _____-13.2 ___ 23 Jan ____ -13.2 ___ 23 Jan 1963

1964______ 26.2 ___ 26 Aug _____ -9.3 ___ 29 Dec _____-7.6 ___ 24 Dec 1963

1965______ 26.1 ___ 14 May _____ -9.3 ____ 3 Mar _____-9.3 ___ 29 Dec 1964 and 3 Mar 1965

1966______ 25.4 ____ 9 June _____ -8.2 ___ 19 Jan ______-9.2 ___ 19 Jan 1966

1967______ 27.1 ___ 17 July ______ -5.6 ____ 9 Dec _____-4.8 ____ 9 Jan 1967

1968______ 26.4 ___ 30 June _____ -8.0 ___ 10 Jan _____ -8.0 ___ 10 Jan 1968

1969______ 28.2 ___ 16 July ______ -8.0 ____ 8 Feb _____ -8.0 ____ 8 Feb 1969

1970______ 30.1 ____ 7 July ______ -8.2 ____ 7 Jan ______ -8.2 ____ 7 Jan 1970

1971______ 27.0 ____ 8 July ______ -6.0 ____ 4 Jan ______ -6.0 ____ 4 Jan 1971

1972______ 25.6 ___ 18 July ______ -9.2 ___ 31 Jan _____ -9.2 ___ 31 Jan 1972

1973______ 28.5 ___ 16 Aug ______-6.1 ___ 15 Feb _____ -6.1 ___ 15 Feb 1973

1974______ 24.9 ___ 21 June _____ -3.8 ____ 1 Jan ______ -5.2 ____ 1 Dec 1973

1975______ 31.9 ____ 4 Aug ______ -3.6 ___ 14 Dec _____ -3.0 ___ 28 Feb 1975

1976______ 33.1 ____ 3 July ______ -5.7 ___ 29 Dec _____ -3.6 ___ 14 Dec 1975 (also -3.5 on 9 Mar 1976)

1977______ 26.6 ____ 6 July ______ -4.4 ___ 17 Jan ______ -5.7 ___ 29 Dec 1976

1978______ 26.3 ___ 31 May _____ -6.7 ___ 11 Feb _____ -6.7 ___ 11 Feb 1978

1979______ 27.3 ___ 27 July _____ -11.2 ___ 28 Jan _____-11.2 ___ 28 Jan 1979

1980______ 27.5 ____ 4 June _____ -5.7 ___ 14 Jan ______ -5.7 ___ 14 Jan 1980

1981______ 25.6 ____ 5 Aug _____-16.1 ___ 13 Dec _____ -4.8 ____ 8 Dec 1980 and 15 Feb 1981

1982______ 27.7 ____ 5 June ____ -12.8 ___ 14 Jan _____-16.1 ___ 13 Dec 1981 (also -12.8 14 Jan 1982)

1983______ 29.2 ___ 16 July ______ -6.7 ___ 23 Nov ______-5.8 ____ 4 Feb 1983

1984______ 28.4 ___ 21 Aug ______-4.6 ___ 15 Feb ______ -6.7 ___ 23 Nov 1983

1985______ 26.6 ___ 25 July^_____ -8.9 ___ 17 Jan ______ -8.9 ___ 17 Jan 1985

1986______ 28.1 ___ 28 June _____ -8.6 ___ 10 Feb _____ -8.6 ___ 10 Feb 1986

1987______ 26.9 ___ 20 Aug ______ -9.8 ___ 12 Jan _____ -9.8 ___ 12 Jan 1987

1988______ 27.6 ____ 7 Aug ______ -5.1 ___ 22 Nov _____-4.5 ___ 10 Dec 1987

1989______ 29.6 ___ 21 July ______ -5.3 ___ 26 Nov _____-5.1 ___ 22 Nov 1988

1990______ 33.4 ____ 3 Aug ______ -3.5 ___ 15 Dec& ____-5.3 ___ 26 Nov 1989 

1991______ 27.3 ___ 29 July ______ -7.7 ___ 12 Dec _____ -7.3 ___ 10, 14 Feb 1991

1992______ 28.2 ___ 29 June _____ -5.7 ___ 23 Jan ______-7.7 ___ 12 Dec 1991

1993______ 25.0 ____ 8 June ______-6.2 ____ 3 Jan ______ -6.2 ____ 3 Jan 1993

1994______ 27.7 __ 12, 30 July ___ -4.5 ___ 23 Dec _____ -5.3 ___ 23 Nov 1993

1995______ 31.9 ____ 1 Aug ______ -8.2 ___ 29 Dec _____ -5.8 ____ 3 Jan 1995

1996______ 29.4 ___ 19 Aug _____ -5.8 ____ 7 Feb ______ -8.2 ___ 29 Dec 1995

1997______ 30.5 ___ 10 Aug _____ -4.7 ____ 3 Jan _______-4.7 ____ 3 Jan 1997

1998______ 26.4 ___ 11 Aug _____ -4.1 ____ 6 Dec ______-4.0 ___ 29 Oct 1997

1999______ 29.6 ___ 31 July ______ -7.0 ___ 20 Dec _____ -4.1 ____ 6 Dec 1998

2000______ 29.2 ___ 18 June _____ -8.3 ___ 30 Dec _____ -7.0 ___ 20 Dec 1999

2001______ 28.7 ___ 26 June _____ -4.9 ____ 5 Mar _____ -8.3 ___ 30 Dec 2000

2002______ 27.9 ___ 29 July ______ -6.5 ____ 1 Jan ______ -6.5 ____ 1 Jan 2002

2003______ 32.8 ____ 9 Aug*_____ -5.3 ___ 18 Feb ______-5.3 ___ 18 Feb 2003

2004______ 29.0 ____ 8 Aug ______ -5.8 ____ 2 Mar _____ -5.8 ____ 2 Mar 2004

2005______ 30.1 ___ 19 June _____ -4.3 __ 18, 29 Dec ___-3.6 ___ 20 Dec 2004

2006______ 33.0 ___ 19 July ______ -6.0 ____ 4 Mar ______-6.0 ____ 4 Mar 2006

2007______ 26.8 ____ 5 Aug ______ -6.6 ____ 7 Feb ______ -6.6 ____ 7 Feb 2007

2008______ 26.8 ___ 27 July ______ -5.1 ___ 17 Feb ______-5.1 ___ 17 Feb 2008

2009______ 28.3 ____ 1 July ______ -7.3 ____ 7 Jan _______-7.3 ____ 7 Jan 2009

2010______ 25.8 _ 23 May, 26 June, 10 July

_________________________________ -12.5 ___ 20 Dec _____ -8.4 ____ 7 Jan 2010 

2011______ 27.8 ___ 27 June^____ -4.3 ___ 29 Jan ______-12.5 ___ 20 Dec 2010

2012______ 26.4 ___ 24 July ______ -7.1 ____ 4 Feb ______ -7.1 ____ 4 Feb 2012

2013______ 29.7 ____ 1 Aug ______ -5.2 ___ 16 Jan ______ -5.2 ___ 16 Jan 2013 (also -4.1 14 Mar, -3.7 31 Mar 2013) 

2014______ 27.6 ___ 26 July ______ -2.9 ___ 29 Dec ______-2.4 ___ 24 Mar 2014

2015______ 32.8 ____ 1 July ______ -4.0 ___ 23 Jan _______ -4.0 ___ 23 Jan 2015

2016______ 30.9 ___ 19 July ______ -4.5 ___ 30 Nov ______-3.3 ___ 16, 24 Feb 2016

2017______ 29.0 ___ 19 June _____ -6.3 ___ 12 Dec ______ -4.5 ___ 30 Nov 2016

2018______ 30.8 ___ 26 July ______ -6.3 ____ 1 Mar ______ -6.3 ___ 12 Dec 2017 & 1 Mar 2018

2019______ 34.2 ___ 25 July ______ -5.5 ___ 31 Jan _______ -5.5 ___ 31 Jan 2019

2020______ 33.2 ___ 31 July*_____ -4.0 ___ 31 Dec _______-2.4 ___ 19 Nov 2019

2021______ 29.2 ___ 22 July ______ -4.9 ___ 11 Feb ______ -4.9 ___ 11 Feb 2021

2022______ 37.3 ___ 19 July*______-9.3 ___ 15 Dec ______ -3.8 ___ 29 Nov 2021

2023______ 28.9 ___ 09 Sep**____ -5.8 ___ 17 Jan  _______ -9.3 ___ 15 Dec 2022 

2024 ______ tbd __________________ -6.7 ___ 18 Jan (so far) _ -6.7 _ 18 Jan 2024 (so far)

___________________________________________

^ 25.5 on 1 Oct 1985, 27.2 30 Sep 2011 and 27.0 1 Oct 2011 were all close but were not annual maxima for CET

* also 30.9 on 15 July 2003, and also 32.0 on 12 Aug 2020, and also 34.3 on 18 July 2022, 31.7 on 14 Aug 2022. 

& -3.3 on 5 Apr 1990 was second coldest reading of year (but not coldest of winter 1989-90)

** also 28.8 on 7 Sep and 28.6 on 10 June. 

 

Edited February 7 by Roger J Smith

[Roger J Smith]

Tables in this thread were based on CET legacy values. Daily record means (page 1) were edited to show the new v2.0 values, and a log of changes was created. Now I am adding the new v2.0 values for daily max and min records. Notes in existing tables will direct readers to this post for updated values.

One set of tables for high maximum and low minimum is followed by another set for low  maximum and high minimum v2.0 records. 

 

CET high maximum records 1878-2023 ____ CET low minimum records 1878-2023

DATE ___ Legacy High max __ v2.0 High max _____[]__Legacy Low min __ v2.0 Low min, year

01 Jan __ 14.3 _ 2022 ______14.5 _ 2022 ______ ___ -8.6 _ 1962 _____ -8.6 _ 1962

02 Jan __ 12.9 _ 1910,76 __ 12.9 _ 1976 ______ ___ -8.7 _ 1962 _____ -8.7 _ 1962

03 Jan __ 12.7 _ 1932,48 __ 12.6 _ 1932,48 ___ ___ -7.8 _ 1962 _____ -7.8 _ 1962

04 Jan __ 13.2 _ 1916 _____ 13.1 _ 1957 ______ ___ -7.2 _ 1893 _____ -6.9 _ 2010

05 Jan __ 13.3 _ 1957,83 __ 13.4 _ 1983 ______ ___ -8.6 _ 1893 _____ -8.2 _ 1893

06 Jan __ 12.7 _ 1916,28 __ 12.7 _ 1916 ______ __ -10.7 _ 1894 ____ -10.9 _ 1894

07 Jan __ 12.9 _ 2005 _____ 13.0 _ 2005,2020__ __-9.7 _ 1894 _____-10.0 _ 1886 (9.1 _ 1894) (-8.4 _ 2010)

08 Jan __ 12.8 _ 2007 _____ 13.0 _ 2007 ______ ___ -7.7 _ 1970, 2010 _-8.7 _ 1886 (-7.7_1970,2010)

09 Jan __ 14.0 _ 2015 _____ 14.2 _ 2015 ______ ___ -6.5 _ 1918 _____ -6.5 _ 1892

10 Jan __ 12.7 _ 1971 _____ 12.7 _ 1971 ______ ___ -8.0 _ 1968, 82__ -8.0 _ 1968, 82

11 Jan __ 12.3 _ 2007 _____ 12.4 _ 2005, 2007 ___ -8.2 _ 1879 _____ -9.2 _ 1879

12 Jan __ 13.1 _ 2007 _____ 13.3 _ 2007 ______ __ -10.1 _ 1963 ____ -10.2 _ 1879 (-10.1 _ 1963 _ -9.8 _ 1987)

13 Jan __ 12.3 _ 2011 _____ 12.5 _ 2011 ______ ___ -9.6 _ 1987 _____ -9.7 _ 1987

14 Jan __ 12.7 _ 1968 _____ 12.7 _ 1968 ______ __ -12.9 _ 1982 ____ -12.8 _ 1982 

15 Jan __ 13.1 _ 1954 _____ 13.1 _ 1954 ______ __ -12.7 _ 1982 ____ -12.7 _ 1982

16 Jan __ 13.1 _ 1993 _____ 13.1 _ 1993 ______ __ -12.7 _ 1881 ____ -12.5 _ 1881

17 Jan __ 12.4 _ 1934 _____ 12.4 _ 1934 ______ __ -11.0 _ 1881 ____ -11.7 _ 1881

18 Jan __ 13.2 _ 2008 _____ 13.3 _ 2008 ______ __ -11.0 _ 1891 ____ -11.2 _ 1891

19 Jan __ 13.6 _ 1930 _____ 13.8 _ 1930 ______ __ -11.1 _ 1891 ____ -11.7 _ 1891

20 Jan __ 12.9 _ 2008 _____ 13.1 _ 2008 ______ __ -11.5 _ 1881 ____ -12.2 _ 1881

21 Jan __ 12.4 _ 1993 _____ 12.5 _ 2024^_____ __ -13.4 _ 1940 ____ -13.3 _ 1940 (-12.9 _ 1881)

22 Jan __ 12.5 _ 1878 _____ 12.0 _ 1878 ______ __ -12.3 _ 1881 ____ -12.5 _ 1881

23 Jan __ 13.0 _ 1884 _____ 13.0 _ 2024^______ __-13.2 _ 1963 _____ -13.2 _ 1963

24 Jan __ 13.7 _ 2016 _____ 13.9 _ 2016 ______ __ -12.7 _ 1963 _____ -12.8 _ 1963

25 Jan __ 13.5 _ 2016 _____ 13.7 _ 2016 ______ __ -10.7 _ 1963 _____ -10.6 _ 1963 (-10.2_1881)

26 Jan __ 13.2 _ 2003 _____ 13.2 _ 2003 ______ __ -10.6 _ 1945 ____ -10.6 _ 1945

27 Jan __ 13.4 _ 2002 _____ 13.4 _ 2002 ______ __ -10.3 _ 1945 ____ -10.3 _ 1945

28 Jan __ 12.6 _ 2018 _____ 12.7 _ 2018 ______ __-11.1 _ 1979 ____  -11.2 _ 1979

29 Jan __ 13.0 _ 2002 _____ 13.0 _ 2002, 2013 __ -8.9 _ 1947 _____ -9.0 _ 1947

30 Jan __ 12.7 _ 1975 _____ 12.9 _ 1898 _____ ___ -8.7 _ 1947 _____ -8.7 _ 1947

31 Jan __ 12.6 _ 2016 _____ 12.8 _ 2016 _____ ___ -9.2 _ 1972 _____ -9.2 _ 1972

^ 21 Jan 2024 new record, 21 Jan 1993 still 12.4 C in v2.0

^ 23 Jan 2024 new record, 23 Jan 1884 fell to 12.3 C in v2.0, 2018 (12.7 C) was v2.0 record. 

==============================

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max _____[]__Legacy Low min __ v2.0 Low min, year

01 Feb __ 13.3 _ 2016 _____ 13.5 _ 2016 _____ ___ -9.7 _ 1956 _____ -9.8 _ 1956

02 Feb __ 13.5 _ 2004 _____ 13.8 _ 2004 _____ __ -10.0 _ 1956 ____ -10.0 _ 1956

03 Feb __ 14.2 _ 2004 _____ 14.5 _ 2004 _____ __ -10.4 _ 1956 ____ -10.5 _ 1956

04 Feb __ 14.5 _ 2004 _____ 14.8 _ 2004 ______ ___-9.7 _ 1956 _____ -9.8 _ 1956

05 Feb __ 13.1 _ 1990 _____ 13.2 _ 1990, 2004___-9.2 _ 1917 _____ -9.6 _ 1917

06 Feb __ 13.4 _ 1989 _____ 13.6 _ 1989 ______ __ -11.0 1917  ____ -10.9 _ 1917

07 Feb __ 12.9 _ 1990 _____ 13.0 _ 1990 ______ __ -11.7 1917 _____ -12.3 _ 1895 (-10.7_1917)

08 Feb __ 12.6 _1903, 2000__12.6_ 1933, 2000__ -13.5 _ 1895 ____ -13.7 _ 1895

09 Feb __ 14.1 _ 2008 _____ 14.4 _ 2008 ______ __ -12.9 _ 1895 ____ -12.5 _ 1895

10 Feb __ 14.6 _ 1899 _____ 14.7 _ 1899 ______ __ -11.3 _ 1895 ____ -11.7 _ 1895

11 Feb __ 13.7 _ 1939 _____ 13.7 _ 1939 ______ ___ -8.6 _ 1986 _____ -8.5 _ 1986

12 Feb __ 14.3 _ 1998 _____ 14.3 _ 1998 ______ __ -10.1 _ 1895 _____ -9.9 _ 1895

13 Feb __ 16.4 _ 1998 _____ 16.4 _ 1998 ______ __ -11.1 _ 1895 ____ -11.2 _ 1895

14 Feb __ 15.8 _ 1998 _____ 15.9 _ 1998 ______ __ -12.5 _ 1929 ____ -12.6 _ 1929

15 Feb __ 14.2 _1998,2019__16.3 _ 2024^ ____ __ -12.1 _ 1929 ____ -11.5 _ 1929

16 Feb __ 14.8 _ 2022 _____ 15.0 _ 2022 ______ ___ -7.2 _ 1969, 1985 _ -7.3 _ 1969 (-7.2 1985)

17 Feb __ 14.2 _1878,1920__14.9 _ 1878^_____ ___ -9.2 _ 1929 _____ -8.6 _ 1929

18 Feb __ 15.0 _ 1945 _____ 15.2 _ 1945 ______ ___ -9.8 _ 1929 _____ -9.8 _ 1929

19 Feb __ 13.5 _ 1961 _____ 13.5 _ 1961 ______ ___ -8.7 _ 1892 _____ -9.0 _ 1892

20 Feb __ 14.1 _ 2017 _____ 14.3 _ 2017 ______ ___ -7.5 _ 1955 _____ -7.5 _ 1955

21 Feb __ 15.0 _ 2019 _____ 15.2 _ 2019 ______ ___ -8.2 _ 1986 _____ -8.2 _ 1986

22 Feb __ 15.0 _ 2019 _____ 15.2 _ 2019 ______ ___ -6.3 _ 1986 _____ -6.5 _ 1942

23 Feb __ 16.2 _ 2019 _____ 16.4 _ 2019 ______ ___ -7.0 _ 1947 _____ -7.0 _ 1947

24 Feb __ 15.9 _ 2019 _____ 16.1 _ 2019 ______ __ -13.6 _ 1947 ____ -13.6 _ 1947

25 Feb __ 17.7 _ 2019 _____ 17.9 _ 2019 ______ __ -12.1 _ 1947 ____ -12.1 _ 1947

26 Feb __ 18.4 _ 2019 _____ 18.6 _ 2019 ______ ___ -8.0 _ 1947 _____ -8.1 _ 1947

27 Feb __ 16.3 _ 2019 _____ 16.5 _ 2019 ______ ___ -6.0 _ 1955 _____ -6.0 _ 1955

28 Feb __ 16.0 _ 1959 _____ 16.0 _ 1959 ______ ___ -7.8 _ 1955 _____ -7.9 _ 1955

29 Feb __ 15.5 _ 1960 _____ 15.5 _ 1960 ______ ___ -4.9 _ 1904 _____ -4.6 _ 1904

_________________

^ 15 Feb 2024 broke 14.4 C in v2.0 (2019).

^ 17 Feb 2023 14.2 C tied the legacy values but fell short of the boosted 1878 v2.0 value.

 

 

01 Mar __ 14.9 _ 1959 ______ 14.9 _ 1959 _______ ___ -7.1 _ 1929 ______ -7.0 _ 1929*

02 Mar __ 16.5 _ 1977 ______ 16.5 _ 1977 _______ ___ -6.7 _ 1965 ______ -6.6 _ 1965

03 Mar __ 14.3 _ 1957 ______ 14.3 _ 1957 _______ ___ -9.3 _ 1965 ______ -9.3 _ 1965

04 Mar __ 16.0 _ 1928 ______ 16.3 _ 1928 _______ ___ -7.2 _ 1890, 1909__-7.8 _ 1890

05 Mar __ 16.0 _ 1961 ______ 16.0 _ 1961 _______ ___ -9.4 _ 1909 ______ -9.0 _ 1909

06 Mar __ 15.3 _ 1961 ______ 15.2 _ 1961 _______ ___ -6.2 _ 1962 ______ -6.2 _ 1962

07 Mar __ 14.9 _ 1906 ______ 14.8 _ 2015 _______ ___ -9.3 _ 1947 ______ -9.4 _ 1947

08 Mar __ 15.1 _ 1961 ______ 15.1 _ 1961 _______ ___ -6.6 _ 1947 ______ -6.6 _ 1947

09 Mar __ 19.9 _ 1948 ______ 19.9 _ 1948 _______ ___ -7.5 _ 1917 ______ -7.1 _ 1917

10 Mar __ 17.4 _ 1929 ______ 17.5 _ 1929 _______ ___ -6.3 _ 1883 ______ -6.1 _ 1883

11 Mar __ 18.4 _ 1957 ______ 18.4 _ 1957 _______ ___ -5.0 _ 1958 ______ -5.0 _ 1958

12 Mar __ 18.4 _ 1957 ______ 18.5 _ 1957 _______ ___ -6.4 _ 1891 ______ -7.5 _ 1891

13 Mar __ 17.2 _ 1991 ______ 17.3 _ 1991 _______ ___ -6.3 _ 1887 ______ -6.4 _ 1887

14 Mar __ 17.9 _ 1948 ______ 17.9 _ 1948 _______ ___ -6.7 _ 1887 ______ -6.6 _ 1887 

15 Mar __ 17.9 _ 1961 ______ 18.0 _ 1961 _______ ___ -5.4 _ 1962 ______ -5.4 _ 1962

16 Mar __ 20.0 _ 1961 ______ 20.0 _ 1961 _______ ___ -4.6 _ 1909 ______ -4.8 _ 1909

17 Mar __ 19.3 _ 1990 ______ 19.4 _ 1990 _______ ___-5.1 _ 1887 ______ -5.2 1887, 1909

18 Mar __ 19.6 _ 1990 ______ 19.7 _ 1990 _______ ___-4.6 _ 1900 ______ -5.0 _ 1900

19 Mar __ 17.6 _ 1972 ______ 17.5 _ 1972 _______ ___ -4.5 _ 1887 ______ -4.6 _ 1887

20 Mar __ 17.5 _ 1929 ______ 17.2 _ 1929 _______ ___ -7.7 _ 1930 ______ -7.3 _ 1930

21 Mar __ 17.8 _ 1927 ______ 17.8 _ 1927 _______ ___ -6.0 _ 1899 ______ -6.0 _ 1899

22 Mar __ 18.0 _ 2022 ______ 18.1 _ 2022 _______ ___ -5.3 _ 1899 ______ -4.7 _ 1899

23 Mar __ 19.4 _ 1945 ______ 19.4 _ 1945 _______ ___ -4.8 _ 1899 ______ -4.7 _ 1899

24 Mar __ 18.9 _ 2012 ______ 19.1 _ 2012 _______ ___ -6.3 _ 1883 ______ -6.7 _ 1883

25 Mar __ 19.1 _ 1953 ______ 19.1 _ 1953^______ ___ -4.4 _ 1883 ______ -4.4 _ 1883

26 Mar __ 18.8 _ 2012 ______ 18.9 _ 2012^______ ___ -4.2 _ 1901 ______ -4.2 _ 1901

27 Mar __ 19.5 _ 2012 ______ 19.6 _ 2012^______ ___ -4.4 _ 1881 ______ -4.6 _ 1881

28 Mar __ 20.3 _ 1929 ______ 20.5 _ 1929 _______ ___ -3.9 _ 1901 ______ -3.8 _ 1901

29 Mar __ 22.1 _ 1965 ______ 22.2 _ 1965 _______ ___ -4.9 _ 1901 ______ -5.1 _ 1901

30 Mar __ 21.2 _ 2021______ 21.3 _ 2021*_______ ___ -3.7 _ 1915 ______ -3.9 _ 1915

31 Mar __ 20.2 _ 2021 ______ 20.4 _ 2021 _______ ___ -3.8 _ 1955, 2013__-3.8 _ 1955 (-3.7 2013)

------------------------------

^ note: 25th to 27th had high daily means (>14 C) in 1777 and may have had warmer days than these record values. 

* (30th 2017 was 19.3) * (min 1st 2018 was -6.3)

======================================================

 

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max ____[]__Legacy Low min __ v2.0 Low min, year

01 Apr __ 19.1 _ 1999 ______ 19.1 _ 1999 _______ ___ -4.0 _ 1967 ______ -4.1 _ 1967

02 Apr __ 20.8 _ 1946 ______ 20.8 _ 1946 _______ ___ -4.9 _ 1917 ______ -4.9 _ 1917

03 Apr __ 23.5 _ 1946 ______ 23.4 _ 1946 _______ ___ -3.9 _ 1917 ______ -4.0 _ 1917

04 Apr __ 22.0 _ 1946 ______ 22.0 _ 1946 _______ ___ -2.8 _ 1990 ______ -3.0 _ 1990

05 Apr __ 19.9 _ 2020 ______ 20.0 _ 2020 _______ ___ -3.1 _ 1990 ______ -3.3 _ 1990 

06 Apr __ 20.3 _ 2011 ______ 20.3 _ 2011 _______ ___ -2.4 _ 1911,1990 __ -2.6 1990 (-2.5 1911)

07 Apr __ 18.6 _ 1933 ______ 18.5 _ 1933 _______ ___ -3.3 _ 2021 ______ -3.1 _ 2021

08 Apr __ 20.3 _ 1969 ______ 20.5 _ 1969 _______ ___ -3.6 _ 1968 ______ -3.6 _ 1968

09 Apr __ 21.4 _ 2017 ______ 21.5 _ 2017 _______ ___ -3.2 _ 1973 ______ -3.2 _ 1973

10 Apr __ 22.0 _ 2020 ______ 22.1 _ 2020 _______ ___ -1.9 _ 1924 ______ -2.4 _ 1924

11 Apr __ 21.7 _ 2020 ______ 21.8 _ 2020 _______ ___ -3.4 _ 1978 ______ -3.4 _ 1978

12 Apr __ 20.8 _ 2020 ______ 20.9 _ 2020 _______ ___ -2.0 _ 2021 ____ -2.0 _1911,1912 (-1.8 2021)

13 Apr __ 19.3 _ 1945 ______ 19.3 _ 1945 _______ ___ -2.3 _ 2021 ______ -2.1 _ 2021

14 Apr __ 21.5 _ 2007 ______ 21.5 _ 2007 _______ ___ -3.3 _ 1892 ______ -3.1 _ 1892

15 Apr __ 23.3 _ 1949 ______ 23.3 _ 1949 _______ ___ -3.6 _ 1892 ______ -3.3 _ 1892

16 Apr __ 25.0 _ 2003 ______ 25.0 _ 2003 _______ ___ -2.3 _ 1892 ______ -2.2 _ 1892

17 Apr __ 22.4 _ 2003 ______ 22.4 _ 2003 _______ ___ -2.4 _ 1892 ______ -2.5 _ 1892

18 Apr __ 22.4 _ 2018 ______ 22.4 _ 2018 _______ ___ -2.8 _ 1892 ______ -2.9 _ 1892

19 Apr __ 24.3 _ 2018 ______ 24.3 _ 2018 _______ ___ -2.3 _ 1892 ______ -2.5 _ 1892

20 Apr __ 23.4 _ 1893 ______ 23.5 _ 1893 _______ ___ -1.7 _ 1969 ______ -1.7 _ 1969

21 Apr __ 23.7 _ 1893 ______ 23.4 _ 1893* ______ ___ -2.3 _ 1936 ______ -2.3 _ 1936, 1997

22 Apr __ 23.4 _ 2011 ______ 23.5 _ 2011 _______ ___ -1.0 _ 1879 ______ -1.1 _ 1879

23 Apr __ 22.4 _ 2011 ______ 22.5 _ 2011 _______ ___ -2.3 _ 1936 ______ -2.3 _ 1936

24 Apr __ 21.9 _ 1893 ______ 21.9 _ 1893 _______ ___ -3.0 _ 1908 ______ -3.0 _ 1908

25 Apr __ 22.9 _ 1893 ______ 23.1 _ 1893 _______ ___ -1.3 _ 1908 ______ -1.5 _ 1908

26 Apr __ 22.5 _ 1928 ______ 22.1 _ 1928 _______ ____-2.0 _ 1900 ______ -2.2 _ 1900 (-1.9 1985)

27 Apr __ 19.8 _ 1916,64 ___ 19.9 _ 1964 _______ ___ -0.7 _ 1906 ______ -1.2 _ 1906 

28 Apr __ 22.0 _ 1987 ______ 22.0 _ 1987^ ______ ___ -1.4 _ 2016 ______ -1.3 _ 2016

29 Apr __ 21.2 _ 1994 ______ 21.3 _ 1994^ ______ ___ -1.4 _ 1976 ______ -1.4 _ 1976

30 Apr __ 22.2 _ 1990 ______ 22.3 _ 1990^ ______ ___ -2.2 _ 1927 ______ -2.2 _ 1927*

------------------------

^ Maxima of 24-27 were likely in 1775 on these last three days of April. Minima around 10th-15th in 1837 very low, some could be records.

* 23.3 2011 not quite a record __ *-1.4 on 30th 1945. 

 

01 May __ 23.7 _ 1966 ______ 23.7 _ 1966 _______ ___ -1.0 _ 1927 ______ -1.2 _ 1886 (-0.9_1927, -0.6 1945)

02 May __ 24.2 _ 1990 ______ 24.2 _ 1990 _______ ___ -0.4 _ 1979 ______ -0.6 _ 1979

03 May __ 25.5 _ 1990 ______ 25.5 _ 1990 _______ ___ -1.5 _ 1967 ______ -1.5 _ 1967

04 May __ 25.2 _ 1990,2006__ 25.3 _ 1990 _______ ___ -1.5 _ 1941 ______ -1.6 _ 1941

05 May __ 23.7 _ 1995 ______ 23.9 _ 1995 _______ ___ -0.5 _ 1982 ______ -0.5 _ 1979, 1982

06 May __ 23.9 _ 1995 ______ 24.0 _ 1995 _______ ___ +0.8 _ 1996 ______ +0.7 _ 1996

07 May __ 25.6 _ 2018 ______ 25.6 _ 2018 _______ ___ -0.5 _ 1892 ______ -0.6 _ 1892

08 May __ 25.0 _ 2016 ______ 25.0 _ 2016 _______ ___ -0.9 _ 1938 ______ -1.0 _ 1938

09 May __ 23.1 _ 2016 ______ 23.1 _ 2016 _______ _ +0.2 _1910, 1980, 1984 _ -0.5_1910

10 May __ 24.3 _ 1959 ______ 24.4 _ 1959 _______ ___ -1.3 _ 1879 ______ -1.3 _ 1879

11 May __ 25.2 _ 2008 ______ 25.2 _ 2008 _______ ___ -0.3 _ 1881 ______ -0.4 _ 1881

12 May __ 25.3 _ 1945 ______ 25.3 _ 1945________ ___ -0.9 _ 2020 ______ -0.8 _ 2020

13 May __ 24.4 _ 1965 ______ 24.5 _ 1965 _______ ___ -0.4 _ 2010 ______ -0.3 _ 2010

14 May __ 26.0 _ 1965 ______ 26.1 _ 1965 (25.9 _ 1992) _-0.6 _ 2020 ______ -0.4 _ 2020

15 May __ 23.7 _ 2000 ______ 23.7 _ 2000^______ ___ +0.2 _ 1915 ______ +0.2 _ 1915

16 May __ 24.5 _ 1952 ______ 24.5 _ 1952 _______ ___ -0.4 _ 1941 ______ -0.6 _ 1941

17 May __ 26.4 _ 1952 ______ 26.4 _ 1952 _______ ___ -1.3 _ 1935 ______ -1.3 _ 1935

18 May __ 26.2 _ 1952 ______ 26.2 _ 1952 _______ ___ -0.7 _ 1891 ______ -0.1 _ 1891

19 May __ 24.6 _ 1992 ______ 24.7 _ 1992 _______ ___ -0.4 _ 1891 ______ -0.2 _ 1891

20 May __ 25.5 _ 2020 ______ 25.5 _ 2020 _______ ___+1.9 _ 1956 ______ +1.9 _ 1894 (2.0 _ 1956)

21 May __ 26.2 _ 1918 ______ 26.4 _ 1918 _______ ___ +0.4 _ 1894 ______ +0.3 _ 1894

22 May __ 26.5 _ 1918 ______ 26.6 _ 1918 _______ ___ +0.4 _ 1894 ______+0.5 _ 1894

23 May __ 26.1 _ 1922 ______ 26.0 _ 1922 (25.8 _ 2010) _+2.0 _ 1905 ______ +1.8 _ 1905

24 May __ 25.3 _ 1992 ______ 25.4 _ 1992 _______ ___ +0.9 _ 1923 ______+1.4 _ 1923

25 May __ 27.7 _ 1953 ______ 27.6 _ 1953 _______ ___ +2.4 _ 1948 ______ +2.4 _ 1948

26 May __ 25.5 _ 2017 ______ 25.5 _ 2017 _______ ___ +1.7 _ 1914 ______ +1.6 _ 1914

27 May __ 25.6 _ 2005 ______ 25.5 _ 2005 _______ ___ +1.1 _ 1914 ______ +1.1 _ 1914

28 May __ 26.2 _ 1944 ______ 26.3 _ 1944 _______ ___ +1.3 _ 1899 ______ +1.2 _ 1899

29 May __ 29.0 _ 1944 ______ 28.9 _ 1944*______ ___ +2.8 _ 1927 ______ +2.8 _ 1927

30 May __ 27.4 _ 1944 ______ 27.4 _ 1944 _______ ___ +2.8 _ 1915,74 ___+2.7 _ 1880,1915,74

31 May __ 28.5 _ 1947 ______ 28.6 _ 1947 _______ ___ +0.8 _ 1975 ______ 0.8 _ 1975 (+1.2_1915)

_____________________________________

^ higher maxima may have occurred 15th May 1833. * 28.6 29th 1947

===========================================

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max ____[]__Legacy Low min __ v2.0 Low min, year

 

01 Jun __ 26.8 _ 1922 ______ 27.0 _ 1922 _______ ___ 1.9 _ 1962 ______ 1.9 _ 1962

02 Jun __ 30.0 _ 1947 ______ 30.0 _ 1947 _______ ___ 2.6 _ 1991 ______ 2.4 _ 1991 (2.9 1989)

03 Jun __ 29.6 _ 1947 ______ 29.5 _ 1947 _______ ___ 3.9 _ 1975 ______ 3.8 _ 1975

04 Jun __ 27.5 _ 1933 ______ 27.5 _ 1933, 1980 ____1.8 _ 1991 ______ 1.6 _ 1991

05 Jun __ 28.4 _ 1942 ______ 28.4 _ 1942 _______ ___ 1.3 _ 1991 ______ 1.2 _ 1991 

06 Jun __ 29.9 _ 1950 ______ 29.9 _ 1950 _______ ___ 3.7 _ 1920 ______ 3.5 _ 1920

07 Jun __ 27.8 _ 1940 ______ 27.7 _ 1933, 1940 ____ 3.6 _ 2005 ______  3.7 _ 2005 

08 Jun __ 28.5 _ 1976 ______ 28.4 _ 1976 _______ ___ 3.1 _ 1985 ______ 2.9 _ 1985

09 Jun __ 28.3 _ 1940 ______ 28.2 _ 1940 _______ ___ 3.1 _ 1881 ______ 3.1 _ 1881

10 Jun __ 28.4 _ 1970^______ 28.6 _ 2023^_______ ___ 2.8 _ 1911 ______ 3.0 _ 1955

11 Jun __ 28.3 _ 1925 ______ 28.4 _ 1925 _______ ___ 4.7 _ 1942 ______ 4.7 _ 1942

12 Jun __ 25.8 _ 2006^_____ 28.4 _ 2023^_______ ___ 4.1 _ 1957 ______ 4.3 _ 1957, 2011

13 Jun __ 26.4 _ 1897^______27.5 _ 2023^ ______ ___ 3.5 _ 1892 ______ 3.6 _ 1892

14 Jun __ 25.1 _ 1887^______ 25.9 2023^ ______ ____ 3.7 _ 1973 ______ 3.6 _ 1973

15 Jun __ 26.9 _ 1896 ______ 27.1 _ 1896 _______ ___ 2.5 _ 1895 ______ 2.8 _ 1895 (3.0_1892)

16 Jun __ 27.5 _ 1957 ______ 27.5 _ 1957 _______ ___ 4.3 _ 1918 ______ 4.2 _ 1918

17 Jun __ 28.3 _ 1957 ______ 28.2 _ 1957, 2022*_ __ 2.9 _ 1916 ______ 3.2 _ 1916

18 Jun __ 29.4 _ 2000 ______ 29.2 _ 2000 _______ ___ 3.7 _ 1892 ______ 4.0 _ 1892

19 Jun __ 29.1 _ 2005,2017__ 30.1 _ 2005 (29.0 _ 2017) __ 3.6 _ 1915 ______ 3.8 _ 2004

20 Jun __ 27.5 _ 1989 ______ 27.5 _ 1989 _______ ___ 4.0 _ 1964 ______ 4.0 _ 1964

21 Jun __ 29.8 _ 2017 ______ 29.6 _ 1941, 2017 ___ ___ 4.0 _ 1903 ______ 3.5 _ 1903

22 Jun __ 28.1 _ 1935 ______ 28.1 _ 1935 _______ ___ 5.1 _ 1903 ______ 4.3 _ 1903

23 Jun __ 28.0 _ 1935 ______ 28.0 _ 1935 _______ ___ 4.1 _ 1957 ______ 4.0 _ 1957

24 Jun __ 29.2 _ 2020 ______ 29.0 _ 2020 _______ ___ 5.4 _ 1926 ______ 5.5 _ 1926, 1944

25 Jun __ 29.4 _ 2020 ______ 29.2 _ 2020 (29.0 _ 1976)_ 5.3 _ 1926,31 ___ 5.3 _ 1931 

26 Jun __ 30.0 _ 1878 ______ 29.4 _ 1878 (29.3 _ 1976) _ 5.1 _ 1918,29 ___ 5.1 _ 1918

27 Jun __ 29.9 _ 1976 ______ 29.9 _ 1976 ________ ___ 4.8 _ 1919 ______ 5.9 _ 1919, 1981

28 Jun __ 30.3 _ 1976 ______ 30.3 _ 1976 ________ ___ 5.2 _ 1921 ______ 5.4 _ 1904 (5.5_1921, 5.6_1981)

29 Jun __ 30.6 _ 2019 ______ 30.4 _ 2019 (30.0 _ 1976) _ 4.6 _ 1907 ______ 4.8 _ 1907

30 Jun __ 29.8 _ 1976 ______ 29.7 _ 1976 ________ ___ 5.3 _ 1972 ______ 5.3 _ 1972

___________

*2022 added to table after first appearance, tied the v2.0 value for 1957. 

the mean for the day (21.0) remained short of the 1917 mark. 

^ 10, 12, 13, 14 June new record high max in v2.0 as shown. 

(13 June 1897 was 26.1 in v2.0) (14 June 1896 25.2 in v2.0, 1887 was 25.0)

 

01 Jul __ 32.7 _ 2015 ______ 32.8 _ 2015 _______ ___ 5.7 _ 1888 ______ 5.4 _ 1888

02 Jul __ 31.8 _ 1976 ______ 31.7 _ 1976 _______ ___ 6.4 _ 1921 ______ 6.5 _ 1938 (7.0 _ 1921)

03 Jul __ 33.2 _ 1976 ______ 33.1 _ 1976 _______ ___ 6.4 _ 1988 ______ 6.3 _ 1988, 1990

04 Jul __ 31.4 _ 1976 ______ 31.3 _ 1976 _______ ___ 4.7 _ 1965 ______ 4.7 _ 1965

05 Jul __ 31.4 _ 1976 ______ 31.3 _ 1976 _______ ___ 7.2 _ 1898 ______ 7.0 _ 1921 (7.4 _ 1898)

06 Jul __ 31.6 _ 1976 ______ 31.6 _ 1976 _______ ___ 6.3 _ 1954 ______ 6.4 _ 1954

07 Jul __ 30.4 _ 1976 ______ 30.3 _ 1976 _______ ___ 5.5 _ 1954 ______ 5.4 _ 1954

08 Jul __ 30.0 _ 1984 ______ 29.9 _ 1984 _______ ___ 5.2 _ 1929 ______ 5.1 _ 1929 

09 Jul __ 28.8 _ 1921 ______ 28.9 _ 1921 _______ ___ 7.0 _ 1919 ______ 7.1 _ 1919

10 Jul __ 30.1 _ 1921 ______ 30.2 _ 1921 _______ ___ 6.7 _ 1890 ______ 6.7 _ 1890

11 Jul __ 29.2 _ 1983 ______ 29.1 _ 1983 _______ ___ 5.1 _ 1888 ______ 4.7 _ 1888

12 Jul __ 31.1 _ 1923 ______ 31.0 _ 1923 _______ ___ 5.1 _ 1902 ______ 5.1 _ 1902

13 Jul __ 30.6 _ 1923 ______ 30.6 _ 1923 _______ ___ 5.6 _ 1993 ______ 5.4 _ 1993

14 Jul __ 29.6 _ 2003 ______ 29.4 _ 2003 _______ ___ 6.5 _ 1898 ______ 6.4 _ 1898

15 Jul __ 31.1 _ 2003 ______ 30.9 _ 2003 _______ ___ 6.5 _ 1977 ______ 6.4 _ 1977

16 Jul __ 29.3 _ 1983 ______ 29.2 _ 1983 _______ ___ 6.9 _ 2001 ______ 6.9 _ 2001

17 Jul __ 29.6 _ 2006 ______ 30.0 _ 2023*_______ ___ 6.2 _ 1965 ______ 6.2 _ 1965

18 Jul __ 30.9 _ 2006 ______ 34.8 _ 2023*_______ ___ 5.8 _ 1971 ______ 5.8 _ 1971

19 Jul __ 32.9 _ 2006 ______ 37.3 _ 2023*_______ ___ 7.2 _ 1892 ______ 7.2 _ 1892

20 Jul __ 29.6 _ 1901 ______ 29.4 _ 1901 _______ ___ 7.3 _ 1890 ______ 7.4 _ 1890 (7.6 _ 2020)

21 Jul __ 29.7 _ 1989 ______ 29.6 _ 1989 _______ ___ 7.0 _ 2020 ______ 7.2 _ 2020 (7.4 _ 1906)

22 Jul __ 29.4 _ 1989 ______ 29.3 _ 1989 _______ ___ 7.2 _ 1970 ______ 7.2 _ 1970

23 Jul __ 30.2 _ 2019 ______ 30.3 _ 2019 _______ ___ 8.1 _ 1883 ______ 8.2 _ 1932 (8.3_1883, 8.4_2011)

24 Jul __ 28.5 _ 2019 ______ 28.6 _ 2019 _______ ___ 6.9 _ 1973 ______ 7.0 _ 1973

25 Jul __ 34.1 _ 2019 ______ 34.2 _ 2019 _______ ___ 6.8 _ 1920 ______ 7.0 _ 1938 (7.1_1920)

26 Jul __ 30.7 _ 2018 ______ 30.8 _ 2018 _______ ___ 6.9 _ 1884 ______ 6.8 _ 1884

27 Jul __ 29.7 _ 2018 ______ 29.7 _ 2018 _______ ___ 6.9 _ 1882 ______ 7.2 _ 1882, 1963

28 Jul __ 30.8 _ 1948 ______ 30.8 _ 1948 _______ ___ 5.7 _ 1881 ______ 5.6 _ 1881

29 Jul __ 31.6 _ 1948 ______ 31.5 _ 1948 _______ ___ 7.8 _ 1896 ______ 7.4 _ 1896

30 Jul __ 30.5 _ 1948 ______ 30.5 _ 1948 _______ ___ 6.6 _ 1898 ______ 6.7 _ 1898

31 Jul __ 33.2 _ 2020 ______ 33.2 _ 2020 _______ ___ 5.4 _ 2015 ______ 5.6 _ 2015

Note also that some higher values may have occurred  in 1868 and in 1808, 1825 and 1826.

* Higher values in July 2022 replaced 29.7 (17 July) 30.9 (18 July) 33.0 (19 July) (all 2006). 

________________________________________________

 

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max ____[]__Legacy Low min __ v2.0 Low min, year

 

01 Aug __ 31.9 _ 1995 ______ 31.9 _ 1995 _______ ___ 6.2 _ 1976 ______ 6.2 _ 1976

02 Aug __ 32.8 _ 1990 ______ 32.8 _ 1990 _______ ___ 6.5 _ 1966 ______ 6.5 _ 1966

03 Aug __ 33.2 _ 1990 ______ 33.4 _ 1990 _______ ___ 5.2 _ 1912 ______ 5.6 _ 1912

04 Aug __ 31.9 _ 1975 ______ 31.9 _ 1975 _______ ___ 7.3 _ 1934 ______ 7.2 _ 1891 (7.3 _ 1934)

05 Aug __ 29.1 _ 2003 ______ 29.1 _ 2003 _______ ___ 6.8 _ 1956 ______ 6.8 _ 1956

06 Aug __ 28.5 _ 2003 ______ 28.5 _ 2003 _______ ___ 6.1 _ 1987 ______ 6.0 _ 1987

07 Aug __ 31.0 _ 1975 ______ 31.1 _ 1975 _______ ___ 6.4 _ 1961 ______ 6.4 _ 1961

08 Aug __ 30.1 _ 1975 ______ 31.1 _ 1975 _______ ___ 6.8 _ 1955 ______ 6.7 _ 1895 (6.8 _ 1955)

09 Aug __ 32.8 _ 2003 ______ 32.8 _ 2003 _______ ___ 6.7 _ 1931 ______ 6.7 _ 1931

10 Aug __ 30.3 _ 1997 ______ 30.5 _ 1997 _______ ___ 6.0 _ 1892 ______ 6.1 _ 1892

11 Aug __ 30.7 _ 2020 ______ 30.9 _ 2022*_______ ___ 5.1 _ 1892 ______ 4.9 _ 1892

12 Aug __ 32.0 _ 2020 ______ 32.0 _ 2020 _______ ___ 5.0 _ 1912 ______ 4.8 _ 1912

13 Aug __ 30.1 _ 1911 ______ 31.4 _ 2022*_______ ___ 6.3 _ 1993 ______ 6.3 _ 1993

14 Aug __ 28.3 _ 1911 ______ 31.7 _ 2022*_______ ___ 5.2 _ 1885 ______ 4.9 _ 1885

15 Aug __ 28.4 _ 1893 ______ 28.0 _ 1893 _______ ___ 4.4 _ 1885 ______ 4.2 _ 1885

16 Aug __ 29.2 _ 1947 ______ 29.2 _ 1947 _______ ___ 5.9 _ 1966 ______ 5.9 _ 1966

17 Aug __ 29.0 _ 1893 ______ 28.7 _ 1893 _______ ___ 7.0_ 1908, 63, 71 __7.0 _ 1908,63

18 Aug __ 29.5 _ 1893 ______ 29.0 _ 1893 (28.9 _ 1996) _5.7 _ 1946 ______ 5.8 _ 1946

19 Aug __ 30.3 _ 1932 ______ 30.3 _ 1932 (29.7 _ 1997) _5.1 _ 1885 ______ 5.1 _ 1888

20 Aug __ 28.8 _ 1995 ______ 28.8 _ 1995 _______ ___ 4.7 _ 1964 ______ 4.7 _ 1964

21 Aug __ 29.2 _ 1995 ______ 29.2 _ 1995 _______ ___ 5.5 _ 1964 ______ 5.4 _ 1904, 1964

22 Aug __ 29.2 _ 1995 ______ 29.3 _ 1995 _______ ___ 5.3 _ 1964 ______ 5.4 _ 1964

23 Aug __ 28.1 _ 1955 ______ 28.1 _ 1955 _______ ___ 5.9 _ 1903 ______ 5.9 _ 1903

24 Aug __ 28.9 _ 1976 ______ 28.9 _ 1976 _______ ___ 5.5 _ 1966 ______ 5.6 _ 1966

25 Aug __ 29.9 _ 2019 ______ 29.9 _ 2019 _______ ___ 5.9 _ 1904 ______ 5.8 _ 1904 

26 Aug __ 27.2 _ 1930 ______ 27.1 _ 1930 _______ ___ 4.8 _ 1931 ______ 4.8 _ 1931

27 Aug __ 30.2 _ 1930 ______ 30.5 _ 1930 _______ ___ 5.9 _ 1896 ______ 5.9 _ 1896

28 Aug __ 29.8 _ 1942 ______ 29.8 _ 1942 _______ ___ 4.8 _ 1935 ______ 4.7 _ 1935

29 Aug __ 29.6 _ 1961 ______ 29.6 _ 1961 _______ ___ 6.3 _ 1959 ______ 5.9 _ 1979 (6.4 _ 1959)

30 Aug __ 27.7 _ 1886 ______ 26.9 _ 1886 _______ ___ 4.1 _ 1890 ______ 4.1 _ 1890

31 Aug __ 30.4 _ 1906 ______ 29.9 _ 1906 _______ ___ 4.0 _ 1921 ______ 3.7 _ 1921

___________________________________

* higher values in 2022 replaced 30.7 (11th, 2020) and 30.5 (13th, 1911) and 28.7 (14th, 1911).

 

01 Sep __ 31.0 _ 1906 ______ 31.2 _ 1906 _______ ___ 2.5 _ 1890 ______ 2.6 _ 1890

02 Sep __ 31.3 _ 1906 ______ 31.1 _ 1906 _______ ___ 3.0 _ 1909 ______ 2.9 _ 1909

03 Sep __ 26.3 _ 1906 ______ 26.0 _ 1906 _______ ___ 3.4 _ 1923 ______ 3.7 _ 1923

04 Sep __ 27.9 _ 1880 ______ 28.1 _ 2023a _______ ___ 3.6 _ 1907 ______ 4.1 _ 1907 (4.2_1915, 4.4_2000)

05 Sep __ 26.6 _ 1999 ______ 27.7 _ 2023b __________ ___ 3.6 _ 1915 ______ 3.8 _ 1908 (4.2_1915)

06 Sep __ 25.5 _ 1898 ______ 28.1 _ 2023c _______ ___ 4.1 _ 2015 ______ 4.2 _ 1952, 2015

07 Sep __ 28.3 _ 2021 ______ 28.8 _ 2023d_______ ___ 4.7 _ 1952 ______ 4.2 _ 1952

08 Sep __ 29.6 _ 1911 ______ 29.4 _ 1911e_______ ___ 2.5 _ 1931 ______ 2.4 _ 1931

09 Sep __ 25.9 _ 1895 ______ 28.9 _ 2023f _______ ___ 3.1 _ 1986 ______ 3.0 _ 1986

10 Sep __ 26.5 _ 1959 ______ 27.1 _ 2023g_______ ___ 3.2 _1897, 1944 __ 3.1 _ 1897

11 Sep __ 27.3 _ 1919 ______ 27.2 _ 1919 _______ ___ 2.9 _ 1944 ______ 2.9 _ 1944

12 Sep __ 25.5 _ 1891 ______ 25.4 _ 1891 _______ ___ 2.6 _ 1908 ______ 3.1 _ 1908

13 Sep __ 26.4 _ 2016 ______ 26.3 _ 2016 _______ ___ 2.8 _ 1925 ______ 3.0 _ 1925 (3.1_1908,31)

14 Sep __ 26.4 _ 2016 ______ 26.4 _ 2016 _______ ___ 3.5 _ 1996 ______ 3.4 _ 1996 (3.5_1882)

15 Sep __ 27.4 _ 2020 ______ 27.4 _ 2020 _______ ___ 3.4 _ 1903 ______ 3.4 _ 1903, 1979 (3.5_1882 4.0 _ 1986)

16 Sep __ 26.3 _ 1898 ______ 26.2 _ 1898 _______ ___ 3.2 _ 1903 ______ 2.9 _ 1903 (3.4 _ 1986)

17 Sep __ 27.4 _ 1898 ______ 27.1 _ 1898 _______ ___ 3.1 _ 2005 ______ 3.1 _ 2005

18 Sep __ 25.4 _ 1926 ______ 25.6 _ 1926 _______ ___ 2.9 _ 1952 ______ 2.3 _ 1889

19 Sep __ 27.1 _ 1926 ______ 27.1 _ 1926 _______ ___ 2.0 _ 1986 ______ 2.0 _ 1986

20 Sep __ 22.9 _ 1970 ______ 22.8 _ 1970 _______ ___ 1.4 _ 1952 ______ 1.3 _ 1952

21 Sep __ 27.1 _ 2006 ______ 27.1 _ 2006 _______ ___ 2.2 _ 1964 ______ 2.2 _ 1964

22 Sep __ 22.9 _ 1956 ______ 22.9 _ 1956 _______ ___ 1.8 _ 1911, 79 __ 1.7 _ 1979

23 Sep __ 23.3 _ 2000 ______ 23.4 _ 1895 (23.2_2000) _ 2.2 _ 1914 ______ 2.0 _ 1914

24 Sep __ 25.1 _ 1895 ______ 25.7 _ 1895 _______ ___ 1.5 _ 1878 ______ 2.1 _ 1878

25 Sep __ 24.2 _ 1895 ______ 24.5 _ 1895 _______ ___ 2.1 _ 2018 ______ 2.2 _ 2018

26 Sep __ 25.4 _ 1895 ______ 25.4 _ 1895 _______ ___ 1.1 _ 1885 ______ 1.1 _ 1885

27 Sep __ 24.9 _ 1895 ______ 25.7 _ 1895 _______ ___ 1.1 _ 1885 ______ 1.0 _ 1885

28 Sep __ 24.8 _ 2011 ______ 25.0 _ 1895 (24.7_2011) _0.5 _ 1885, 1919 __ 0.5 _ 1885 (0.7_1919)

29 Sep __ 26.4 _ 2011 ______ 26.4 _ 2011 _______ ___ 0.3 _ 1919 ______ 0.3 _ 1919

30 Sep __ 27.3 _ 2011 ______ 27.2 _ 2011 _______ ___ 0.8 _ 1914 ______ 0.9 _ 1914

_________________

a 4 Sep ... 27.4 _ 1880 previous record

b 5 Sep ... 26.5 _ 1999 previous record also 26.4 in 1949. 

c 6 Sep ... 25.6 _ 1898 previous record

d 7 Sep ... 28.3 _ 2021 previous record 

e 8 Sep ... 28.6 in 2023 failed to break 1911 record

f 9 Sep ... 25.7 _ 1895 previous record

g 10 Sep ... 26.5 _ 1959 previous record

==========================

 

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max ____[]__Legacy Low min __ v2.0 Low min, year

 

01 Oct __ 27.1 _ 2011 ______ 27.0 _ 2011 _______ ___ 0.1 _ 1928 ______ 0.0 _ 1928

02 Oct __ 24.2 _ 2011 ______ 24.0 _ 2011 _______ ___ 0.1 _ 1888 ______-0.3 _ 1888

03 Oct __ 25.5 _ 1959 ______ 25.4 _ 1959 _______ ___ 0.1 _ 1888 ______-0.3 _ 1888

04 Oct __ 23.7 _ 1959 ______ 23.7 _ 1959 _______ ___-0.5 _ 1912 ______-0.6 _ 1912

05 Oct __ 23.4 _ 1921 ______ 23.9 _ 1921 _______ ___-0.4 _ 1888 ______-0.4 _ 1888

06 Oct __ 24.6 _ 1921 ______ 24.4 _ 1921 _______ ___-0.3 _ 1888 ______-0.4 _ 1888

07 Oct __ 21.5 _ 1965 ______ 21.5 _ 1959* _________ -0.2 _ 1888 _ -0.5 _ 1888

08 Oct __ 23.3 _ 1995 ______ 23.1 _ 1995 _______ ___ 0.7 _ 1912 ______ 0.6 _ 1990 (0.9_1912)

09 Oct __ 24.0 _ 1921 ______ 23.9 _ 1921 _______ ___ 0.8 _ 1925 ______ 1.1 _ 1925

10 Oct __ 22.8 _ 2018 ______ 22.6 _ 2018 _______ ___-0.1 _ 1925 ______ 0.0 _ 1925

11 Oct __ 23.0 _ 1978 ______ 22.8 _ 1978 _______ ___-1.0 _ 1952 ______-1.0 _ 1952

12 Oct __ 22.3 _ 1978 ______ 22.0 _ 1978 _______ ___-0.9 _ 1887 ______-1.2 _ 1887

13 Oct __ 22.0 _ 2018 ______ 21.8 _ 2018 (21.7_1990)__-0.7 _ 1964 ___-0.7 _ 1964

14 Oct __ 19.2 _ 1990, 2017__ 19.0 _ 1990, 2017 ___ ___ 0.3 _ 1917 __ -0.3 _ 1888 (0.5_1917)

15 Oct __ 19.1 _ 1908 ______ 18.8 _ 1908 _______ ___-1.5 _ 1917 ______-1.3 _ 1917

16 Oct __ 20.5 _ 2017 ______ 20.4 _ 2017 _______ ___-2.7 _ 1993 ______-2.8 _ 1993

17 Oct __ 19.1 _ 1969 ______ 19.2 _ 1969 _______ ___-2.2 _ 1905 ______-2.4 _ 1881 (-2.2_1905)

18 Oct __ 21.8 _ 1921 ______ 21.7 _ 1921 _______ ___-2.2 _ 1955 ______-2.3 _ 1955

19 Oct __ 20.2 _ 1997 ______ 20.1 _ 1997 _______ ___-3.0 _ 1926 ______-2.9 _ 1926

20 Oct __ 18.5 _ 1969 ______ 18.5 _ 1969 _______ ___-1.6 _ 1905 ______-1.6 _ 1905

21 Oct __ 18.9 _ 1968 ______ 18.8 _ 1968 _______ ___-2.2 _ 1935 ______-2.3 _ 1935

22 Oct __ 19.4 _ 1971 ______ 19.3 _ 1971 _______ ___-2.8 _ 1931 ______-2.9 _ 1931 (-2.7_1905)

23 Oct __ 18.7 _ 2011 ______ 18.6 _ 2011 _______ ___-2.6 _ 1951 ______-2.7 _ 1951

24 Oct __ 18.2 _ 1995 ______ 18.1 _ 1995 _______ ___-3.7 _ 1895 ______-3.6 _ 1895

25 Oct __ 17.8 _ 2013 ______ 17.7 _ 2013 _______ ___-1.5 _ 1895, 1931__-1.5 _ 1931 (-1.4 _ 1895 -1.3 1887)

26 Oct __ 17.0 _ 2005 ______ 17.7 _ 2022*(16.8 _ 1888) _-3.6 _ 1887 ______-4.0 _ 1887

27 Oct __ 19.6 _ 2005 ______ 19.6 _ 2005 (18.7 _ 1888) _-3.9 _ 1931 ______-3.9 _ 1931

28 Oct __ 18.1 _ 2014 ______ 17.9 _ 2014 (17.4 _ 1888) _-3.8 _ 1895 ______-3.5 _ 1895

29 Oct __ 17.2 _ 1908 ______ 19.5 _ 2022*_______ ___-3.9 _ 1895______-4.0 _ 1895, 1997

30 Oct __ 17.8 _ 2005 ______ 17.8 _ 2005 _______ ___-1.9 _ 1895 ______-1.9 _ 1895 (-1.7_1988)

31 Oct __ 20.6 _ 2014 ______ 20.5 _ 2014 _______ ___-3.2 _ 1881 ______-3.3 _ 1881

 7th _ * (21.4_1965,2023) now tied 0.1 below v2.0 record 21.5 (1959)

26th_ * 17.1 (2005) had been the record previously.

29th _ * 17.5 (2005) had been the record previously.

 

01 Nov __ 16.7 _ 2020 ______ 16.6 _ 2020 _______ ___-3.8 _ 1926 ______-4.3 _ 1926

02 Nov __ 17.7 _ 1927 ______ 17.6 _ 2005 _______ ___-4.0 _ 1880 ______-4.2 _ 1880

03 Nov __ 16.8 _ 2011 ______ 16.7 _ 2011 _______ ___-2.2 _ 1985______ -3.9 _ 1985

04 Nov __ 18.7 _ 1946 ______ 18.7 _ 1946 _______ ___-2.4 _ 1901 ______-2.1 _ 1880,1896

05 Nov __ 17.6 _ 1938 ______ 17.7 _ 1938 _______ ___-3.6 _ 1930 ______-3.4 _ 1930

06 Nov __ 16.2 _ 2015 ______ 16.2 _ 2015 (16.1_1972)__-3.6 _ 1901 ______-3.8 _ 1901

07 Nov __ 16.1 _ 2015 ______ 16.1 _ 2015 _______ ___-2.6 _ 1896 ______-2.5 _ 1896

08 Nov __ 15.5 _ 1998 ______ 15.2 _ 1983, 1985, 1998__-4.1 _ 1923___-4.0 _ 1923

09 Nov __ 15.9 _ 1977 ______ 15.6 _ 1977 _______ ___-5.4 _ 1921 ______-4.8 _ 1921

10 Nov __ 16.2 _ 1977 ______ 16.0 _ 1977, 2015 _ ___-4.7 _ 1908 ____-4.5 _ 1908

11 Nov __ 15.3 _ 1938 ______ 15.9 _ 2022* ______ ___-3.0 _ 1921 ______-2.6 _ 1921

12 Nov __ 16.3 _ 1938 ______ 16.3 _ 1938 _______ ___-5.1 _ 1919 ______-5.3 _ 1919

13 Nov __ 16.1 _ 1938 ______ 16.2 _ 1938 _______ ___-4.4 _ 1979 ______-4.8 _ 1921 (-4.6_1979)

14 Nov __ 14.8 _ 1994, 2015__ 14.7 _ 1938, 1994, 2015 ___-4.1 _ 1925 ____-4.0 _ 1925, 1965

15 Nov __ 15.4 _ 2015 ______ 15.4 _ 2015 _______ ___-4.7 _ 1965 ______-4.7 _ 1965

16 Nov __ 15.7 _ 1895 ______ 15.8 _ 1895 _______ ___-6.4 _ 1901 ______-5.8 _ 1901

17 Nov __ 14.8 _ 1997 ______ 14.7 _ 1997 (14.6 _ 2015)_-6.1 _ 1901, 30 __ -6.1 _ 1901 (-5.8_1930)

18 Nov __ 15.2 _ 1978 ______ 14.9 _ 1978 _______ ___-4.6 _ 1929 ______-4.4 _ 1882

19 Nov __ 15.6 _ 1994 ______ 15.4 _ 1994 _______ ___-2.6 _ 2005 ______-2.7 _ 2005 

20 Nov __ 15.3 _ 1947 ______ 15.3 _ 1947 _______ ___-3.7 _ 1971 ______-3.8 _ 1971

21 Nov __ 15.7 _ 1947 ______ 15.7 _ 1947 _______ ___-3.9 _ 1880 ______-4.1 _ 1914 (-4.0_1880)

22 Nov __ 15.4 _ 1906 ______ 15.4 _ 1906 (15.3_1947) _-5.0 _ 1988 ______-5.1 _ 1988 (-4.9_1880)

23 Nov __ 14.3 _ 1947 ______ 14.4 _ 1947 _______ ___-6.6 _ 1983 ______-6.7 _ 1983*

24 Nov __ 14.0 _ 1980 ______ 13.8 _ 1916, 1980___ ___-8.8 _ 1904 ______-7.8 _ 1904

25 Nov __ 13.8 _ 1983 ______ 13.7 _ 1983 (13.6_1970) _-5.6 _ 1952 _____ -5.9 _ 1923 (-5.7_1952, -5.5_1904)

26 Nov __ 14.5 _ 1979 ______ 14.3 _ 1979 _______ ___-5.1 _ 1989 ______-5.3 _ 1989

27 Nov __ 13.6 _ 2000, 2006 __13.5 _ 2006 (13.4_2000)_ -6.3 _ 1915 ______-6.3 _ 1923 (-6.1_1904, 5.8_1915)

28 Nov __ 14.7 _ 2000 ______ 14.4 _ 2000 _______ ___-7.0 _ 2010 ______-7.0 _ 2010

29 Nov __ 14.0 _ 1939 ______ 14.0 _ 1939 _______ ___-6.3 _ 2010 ______-6.3 _ 2010

30 Nov __ 14.3 _ 2001 ______ 14.1 _ 2001 _______ ___-5.8 _ 1919 ______-5.5 _ 1919 (-4.5 _ 2016)

______________________________ Notes:

* 11th _ 2022 (15.9) replaced 15.5 in v2.0 (1938).

* 23rd _ Minimum possibly lower in 1858 (daily mean -3.9) before daily minima began.

==============================================

High Maximum 1878-2022 _ Legacy vs v2.0 ____ Low Minimum 1878-2022 _ Legacy vs v2.0

DATE ___ Legacy High max __ v2.0 High max ____[]__Legacy Low min __ v2.0 Low min, year

 

01 Dec __ 13.8 _ 1985 ______ 13.6 _1985 (13.4_1939) _ -6.4 _ 1947 ______-6.4 _ 1947 (-5.2_1973)

02 Dec __ 14.4 _ 1985 ______ 14.3 _ 1985 (14.2_1954) _-7.1 _ 1879 ______-7.1 _ 1879

03 Dec __ 13.7 _ 1953 ______ 13.7 _ 1953 _______ ___-7.5 _ 1879, 2010 _-7.8 _ 1879 (-7.5_2010)

04 Dec __ 13.8 _ 1888, 1979 __ 13.7 _ 1888 (13.6_1979) _-6.7 _ 2010 ______-6.8 _ 2010

05 Dec __ 13.9 _ 1898 ______ 14.0 _ 1898 _______ ___-7.8 _ 1879 ______-8.3 _ 1879

06 Dec __ 14.0 _ 2007 ______ 14.0 _ 2007 _______ ___-8.1 _ 1879 ______-8.3 _ 1879 (-5.8_2010)

07 Dec __ 14.0 _ 2015 ______ 14.0 _ 2015 _______ __ -11.4 _ 1879_____-11.0_ 1879 (-6.6_2010)

08 Dec __ 13.8 _ 1964 ______ 13.8 _ 1964 _______ ___-7.5 _ 1879 ______-6.9 _ 2010

09 Dec __ 13.5 _ 2016 ______ 13.5 _ 2016 _______ ___-5.6 _ 1967 ______-5.6 _ 1967 (-4.8 _ 2010)

10 Dec __ 14.4 _ 1994 ______ 14.3 _ 1994 _______ ___-6.8 _ 1981______ -7.0 _ 1981

11 Dec __ 14.5 _ 1994 ______ 14.3 _ 1994 _______ ___-6.7 _ 1879*_____ -7.4 _ 1882 (-6.1_1879)

12 Dec __ 13.9 _ 1994 ______ 13.8 _ 1994 _______ __-13.2 _ 1981 ____ -13.5 _ 1981

13 Dec __ 13.5 _ 1972 ______ 13.5 _ 1972 _______ __-15.9 _ 1981_____ -16.1 _ 1981

14 Dec __ 13.9 _ 1912 ______ 13.6 _ 1972, 1998_ ___ -8.4 _ 1890 ______-8.6 _ 1878 (-8.5_1899, -7.7_1890)

15 Dec __ 13.2 _ 2015 ______ 13.2 _ 2015 _______ ___ -8.4 _ 1878 ______-9.3 _ 2022*

16 Dec __ 13.9 _ 2015 ______ 13.9 _ 2015 _______ ___ -5.5 _ 1899 ______ -8.0 _ 2022* 

17 Dec __ 14.1 _ 2015 ______ 14.1 _ 2015 _______ ___ -7.3 _ 1878 ______ -7.8 _ 1878*

18 Dec __ 15.1 _ 2015 ______ 15.1 _ 2015 _______ ___ -7.2 _ 1981 ______ -7.5 _ 1981*

19 Dec __ 15.3 _ 2015 ______ 15.3 _ 2015 _______ __ -10.3 _ 2010 _____ -10.4 _ 2010 (-9.0 _ 1981)

20 Dec __ 13.9 _ 1971 ______ 13.9 _ 1971 _______ __ -12.4 _ 2010 _____ -12.5 _ 2010

21 Dec __ 13.7 _ 2015 ______ 13.7 _ 2015 _______ __ -10.6 _ 2010 _____ -10.6 _ 2010 

22 Dec __ 13.8 _ 2015 ______ 13.7 _ 2015 _______ __ -12.6 _ 1890 _____ -11.7 _ 1890

23 Dec __ 14.7 _ 1977 ______ 14.5 _ 1977 _______ ___-8.4 _ 1935 ______ -8.4 _ 1935

24 Dec __ 13.0 _ 1997 ______ 13.3 _ 2023^_______ ___-9.8 _ 1878 _____ -11.1 _ 1878

25 Dec __ 13.1 _ 2015, 16 ___13.2 _ 2016 _______ __-11.2 _ 1878 _____-11.8 _ 1878* (-9.3 _ 2010)

26 Dec __ 13.8 _ 2015 ______ 13.8 _ 2015 _______ ___ -9.7 _ 2010 ______-9.7 _ 2010 (-8.0 _ 1962)

27 Dec __ 13.9 _ 1974 ______ 13.7 _ 1974 _______ ___ -9.1 _ 1892 ______-9.2 _ 1892 (-6.7 _ 2010)

28 Dec __ 14.3 _ 1974 ______ 14.2 _ 1974 _______ ___ -8.1 _ 1892 ______-7.9 _ 1892

29 Dec __ 13.8 _ 1925,2021 ___13.9 _ 2021 _______ ___ -9.2 _ 1964 ______-9.3 _ 1964 (-8.2_1995)

30 Dec __ 13.9 _ 2021 ______ 14.0 _ 2021 _______ __ -10.7 _ 1908 ______-9.5 _ 1908 (-8.3_2000)

 

31 Dec __ 14.0 _ 2021 ______ 14.1 _ 2021 _______ ___ -6.4 _ 1892 ______-6.8 _ 1892, 2000

Note:

* 15 Dec _ -9.3 2022 replaced -8.3 1878.

* 16-18 Dec _ -8.0 2022 replaced -5.6 1899 on 16th; 1859 likely had lower minima around -10 to -12 16th-18th

^ 24 Dec _ 13.4 2023 replaced 12.8 1977 in v2.0. 

* 25 Dec _ 1796 likely around -15 as daily mean was -10.8. Also some lower minima likely in Dec 1798, 1844, 1859 (see daily means)

 

CET Low maximum records 1878-2023 ____ CET high minimum records 1878-2023

Date __ CET leg _ CET v2.0 ____________ CET leg _ CET v2.0 _______________

01 Jan _ -1.1 1962 _ -1.1 1962 _________10.9 2022 _10.9 2022

02 Jan _ -1.8 1893 _ -1.6 1893 _________ 8.9 1921 _ 8.7 1921

03 Jan _ -0.9 1941 _ -0.9 1941 _________10.5 1932 _10.4 1932

04 Jan _ -2.1 1894 _ -2.3 1894 _________ 9.7 1932 _ 9.7 1932

05 Jan _ -4.2 1894 _ -4.7 1894 _________ 9.5 1957 _ 9.5 1957

06 Jan _ -3.0 1894 _ -3.1 1894 _________ 9.2 1983 _ 9.2 1983

07 Jan _ -2.6 1894 _ -2.0 1894 _________ 8.8 1890 _ 8.8 1890

08 Jan _ -2.1 1982 _ -2.0 1982 _________ 8.2 1890 _ 7.9 1989

09 Jan _ -2.5 1982 _ -2.4 1982 _________ 8.2 1957,71 _8.3 1957

10 Jan _ -2.3 1982 _ -2.3 1879 _________10.4 1921 _10.5 1921

11 Jan _ -3.3 1987 _ -3.2 1987 _________ 8.8 1990 _ 8.8 1990

12 Jan _ -5.7 1987 _ -5.6 1987 _________ 8.4 1976 _ 8.4 1976

13 Jan _ -3.5 1987 _ -3.5 1987 _________ 8.8 2007 _ 8.8 2007

14 Jan _ -4.4 1881 _ -4.4 1881 _________ 9.5 2011 _ 9.5 2011

15 Jan _ -2.7 1881 _ -2.9 1881 _________ 8.3 1968 _ 8.4 1968

16 Jan _ -3.0 1985 _ -3.0 1985 _________ 9.8 1990 _ 9.7 1990

17 Jan _ -2.1 1940 _ -2.2 1940 _________ 9.3 1908 _ 9.3 1908

18 Jan _ -1.3 1881 _ -1.3 1891 _________ 8.0 1920 _ 8.0 1921

19 Jan _ -2.9 1881 _ -2.9 1881 _________ 9.9 1932 _ 9.9 1932

20 Jan _ -3.8 1940 _ -3.9 1940 _________ 9.9 1898 _ 9.7 1898

21 Jan _ -3.2 1881 _ -3.2 1881 _________ 9.6 1898 _ 9.5 1898

22 Jan _ -1.8 1963 _ 1.9 1963 _________ 8.7 1969 _ 8.7 1969

23 Jan _ -3.6 1963 _ -3.6 1963 _________ 9.2 1960 _ 9.2 1960

24 Jan _ -3.6 1963 _ -3.6 1963 _________ 8.2 2018 _ 8.1 2018

25 Jan _ -4.0 1881 _ -4.1 1881 _________ 9.7 2016 _ 9.6 2016

26 Jan _ -4.5 1945 _ -4.5 1945 _________ 8.4 1903 _ 8.1 1903

27 Jan _ -0.8 1945,54 _-1.2 1954 ________ 8.4 2016 _ 8.4 1903,2016

28 Jan _ -1.1 1895,1954 _-1.1 1954 _______ 8.8 1958 _ 8.8 1958

29 Jan _ -3.8 1947 _ -3.8 1947 _________ 9.0 1921 _ 8.9 1921

30 Jan _ -1.4 1947 _ -1.4 1947 _________ 8.5 1923 _ 8.4 2000

31 Jan _ -1.9 1954 _ -1.9 1954 _________ 8.9 2000 _ 8.9 2000

 

01 Feb _ -3.8 1956 _ -3.9 1956 _________ 9.8 1923 _ 9.4 1923

02 Feb _ -2.9 1956 _ -2.9 1956 _________10.3 1923 _10.0 1923

03 Feb _ -0.3 1956 _ -0.3 1956 _________ 9.7 2004 _ 10.0 2004

04 Feb _ -3.0 1912 _ -2.9 1912 _________10.8 2004 _10.8 2004

05 Feb _ -0.6 1912 _-0.3 1895,1912 _____ 10.5 2004 _10.5 2004

06 Feb _ -4.5 1895 _ -4.5 1895 _________ 8.8 2011 _ 8.9 2011

07 Feb _ -2.7 1895 _ -3.3 1895 _________ 8.7 1989 _ 8.7 1989

08 Feb _ -3.0 1895 _ -3.2 1895 _________10.1 1903 _ 9.4 1903

09 Feb _ -1.8 1895 _ -1.4 1895 _________ 9.4 1903 _ 9.6 1903

10 Feb _ -2.7 1985 _ -2.5 1985 _________ 9.4 1899 _ 9.5 1899

11 Feb _ -1.8 1947,85 _ -1.9 1929 _______ 9.1 1939 _ 9.1 1939

12 Feb _ -2.9 1929 _ -2.9 1929 _________ 8.8 2002 _ 8.7 1943

13 Feb _ -3.4 1929 _ -3.4 1929 _________ 7.6 1998 _ 7.4 1998

14 Feb _ -1.6 1929 _ -1.7 1895,1929 _____ 7.7 1882 _ 8.1 1882

15 Feb _ -3.9 1929 _ -3.3 1895 _________10.0 1958 _11.1 2024*

16 Feb _ -1.2 1947 _ -1.3 1947 _________ 9.4 1928 _ 9.7 1928

17 Feb _ -2.3 1947 _ -2.3 1947 _________ 8.1 1911 _ 8.4 2023*

18 Feb _ -0.8 1947 _ -0.8 1947 _________ 9.0 1911 _ 9.7 2024*

19 Feb _ -0.6 1892 _ -0.9 1892 _________ 8.4 1945,89 _8.4 1945

20 Feb _ -0.7 1947 _ -0.7 1947 _________ 9.7 1990 _ 9.7 1990

21 Feb _ -2.1 1947 _ -2.2 1947 _________ 8.5 2021 _ 8.8 1903

22 Feb _ -0.8 1947 _ -0.7 1947 _________ 8.6 1953 _ 8.5 1953

23 Feb __ 0.0 1947 __ 0.0 1947 _________ 8.8 1918 _ 8.6 1918

24 Feb _ -0.6 1956 _ -0.5 1956 _________ 9.5 1922 _ 9.4 1990

25 Feb __ 0.0 1986 __0.3 1929,86 ______ 8.0 1900 _ 8.0 1900

26 Feb _ -1.3 1929 _ -1.3 1929 _________ 9.9 1882 _ 9.6 1882

27 Feb _ -1.5 1929 _ -1.5 1929 _________ 9.0 1945 _ 9.0 1945

28 Feb _ -1.3 2018 _ -1.1 2018 _________ 8.6 1912 _ 8.5 1912

29 Feb __ 0.1 1904 __ 0.5 1904 _________ 8.5 1960 _ 8.8 1912

NOTE:

* 11.1 on 15 Feb 2024 replaced 10.0 in v2.0 (1958).

* 8.4 17 Feb 2023 replaced 8.1 in v2.0 (1911). 

* 8.8 18 Feb 2023 replaced 8.5 in v2.0 (1945). (CET legacy was 9.0 in 1911).

... later replaced by 18 Feb 2024 (9.7)

 

01 Mar _ -1.2 2018 _ -1.1 2018 _________ 8.9 1878 _ 9.1 1878

02 Mar __ 0.0 1892 _ -0.3 1892 _________ 8.9 1999 _ 8.8 1999

03 Mar _ -0.1 1892 _ -0.5 1892 _________ 8.4 1979 _ 8.4 1979

04 Mar __ 0.5 1965 __ 0.6 1965 _________ 8.1 1977 _ 8.2 1922

05 Mar __ 0.3 1947 __ 0.3 1947 _________ 7.8 1880 _ 7.8 1880

06 Mar _ -0.7 1942 _ -0.8 1942 _________ 9.4 1989 _ 9.4 1989

07 Mar __ 0.9 1931 __ 0.8 1931 _________ 8.6 1926,2002 _8.8 1926^

08 Mar __ 0.6 1917 __ 0.6 1917 _________10.0 2000 _ 9.8 1981,2000

09 Mar __ 0.7 1931 __ 0.7 1931 _________10.3 2000 _10.1 2000

10 Mar __ 0.9 1891 __ 0.7 1891 _________ 9.9 1957 _ 9.8 1957

11 Mar __ 0.5 1928 __ 0.6 1928 _________10.1 1981 _10.1 1981

12 Mar __ 1.0 1928 __ 1.0 1928 _________ 8.5 2017 _ 8.6 2017

13 Mar __ 2.4 1888 __ 2.1 1888 _________ 9.0 1961 _ 9.0 1961

14 Mar __ 1.9 1947 __ 1.8 1947 _________ 8.3 1912 _ 9.4 2024^

15 Mar __ 1.4 1887 __ 1.3 1887 _________ 8.8 1957 _ 9.7 2024^

16 Mar __ 0.9 1979 __ 0.9 1979 _________ 9.6 2004 _ 9.6 2004

17 Mar __ 1.5 1888,2018 _1.6 1888 ____10.4 2005 _10.2 2005

18 Mar __ 0.7 2018 __ 0.8 2018 _________ 9.4 1898 _ 9.1 1898,1993

19 Mar __ 1.6 1888 __ 1.5 1888 _________ 9.5 2017 _ 9.6 2017

20 Mar __ 2.8 1888 __ 2.9 1888 _________ 9.3 2017 _ 9.5 2024^

21 Mar __ 2.4 1883 __ 2.3 1883 _________ 9.5 1931 _ 9.4 1931

22 Mar __ 1.9 1883 __ 1.8 1879 _________10.4 1927 _10.2 1927

23 Mar __ 0.8 2013 __ 0.9 2013 _________ 9.2 1936 _ 9.5 1886

24 Mar __ 0.4 1879 __ 0.4 1879 _________ 9.0 2005 _ 9.1 2005

25 Mar __ 0.1 1879 __ 0.2 1879 _________ 9.9 1981 _ 9.8 1981

26 Mar __ 1.1 1879 __ 1.1 1879 _________ 9.7 2006 _ 9.8 2006

27 Mar __ 3.0 2013 __ 3.0 1901 _________10.9 2006 _11.0 2006

28 Mar __ 2.8 1952 __ 2.9 1952 _________ 9.1 1981 _ 9.5 1890

29 Mar __ 2.1 1952 __ 2.2 1952 _________ 9.8 1945 _ 9.8 1945

30 Mar __ 3.4 1952 __ 3.5 1952 _________11.2 1998 _11.1 1998,2017

31 Mar __ 3.3 1922 __ 3.5 1922 _________10.7 2017 _10.8 2017

^ 7 Mar 1926 was 8.9 in v2.0, reduced to 8.8 in v2.0.1.0.  

^ 14 Mar 2024 replaces 8.3 (1884) in v2.0 

^ 15 Mar 2024 replaces 8.8 (1957) in v2.0

^ 20 Mar 2024 replaces 9.4 (2017) in v2.0

 

01 Apr __ 3.1 1917 __ 3.3 1917 __________10.2 2011 _10.3 2011

02 Apr __ 3.3 1968 __ 3.2 1968 __________11.3 2011 _11.4 2011

03 Apr __ 3.1 1922 __ 2.8 1922 __________ 9.9 1985 _ 9.9 1985

04 Apr __ 5.0 1911 __ 5.2 1911 __________11.9 1926 _12.1 1926

05 Apr __ 2.3 1911 __ 2.4 1911 __________10.4 1999 _10.5 1999

06 Apr __ 4.1 1911 __ 4.1 1911 __________10.5 2014 _12.0 2024^

07 Apr __ 4.1 1986 __ 4.2 1986 __________ 9.4 2014 _ 9.5 2014

08 Apr __ 4.9 1986 __ 4.9 1986 __________ 9.7 1937 _ 9.6 1937

09 Apr __ 6.0 1891,1917 _5.9 1917__________ 9.4 1999 _ 9.3 1999

10 Apr __ 4.1 1978 __ 3.9 1917 __________10.9 1928,37 _10.9 1937

11 Apr __ 5.4 1879 __ 5.2 1879 __________11.6 1981 _11.5 1981

12 Apr __ 3.7 1879 __ 3.8 1879 __________10.1 1949 _10.0 1943,49

13 Apr __ 3.7 1892 __ 3.5 1892 __________10.2 1939 _10.3 1939

14 Apr __ 2.3 1966 __ 2.3 1966 __________10.5 1905 _10.2 1905

15 Apr __ 3.3 1966 __ 3.4 1966 __________11.9 1945 _11.9 1945

16 Apr __ 4.6 1966 __ 4.6 1966 __________11.8 1945 _11.9 1945

17 Apr __ 5.3 1966 __ 5.3 1966 __________ 9.7 2018 _ 9.9 2018

18 Apr __ 6.0 1918 __ 6.3 1918,83 ________11.6 2018 _11.7 2018

19 Apr __ 5.1 1881 __ 4.9 1881 __________11.0 2018 _11.1 2018

20 Apr __ 5.9 1881 __ 5.9 1881 __________ 9.8 1893 _ 9.8 1893

21 Apr __ 6.4 1918 __ 5.4 1918 __________ 9.9 1895,1963 _9.9 1910

22 Apr __ 7.6 1936 __ 7.5 1888,1936 _____11.1 2018 _11.3 2018

23 Apr __ 4.3 1908 __ 4.3 1908 __________ 9.9 1993 _ 9.8 1993

24 Apr __ 4.0 1908 __ 4.2 1908 __________12.3 2007 _12.4 2007

25 Apr __ 5.0 1908 __ 5.0 1908 __________12.2 2007 _12.3 2007

26 Apr __ 6.1 1981 __ 6.2 1981 __________10.3 1930 _10.2 1896

27 Apr __ 5.7 1919 __ 5.9 1919 __________11.1 1928 _10.8 1928

28 Apr __ 7.7 1892,1919 _ 7.4 1919 ________12.1 1994 _11.9 1994

29 Apr __ 7.6 1945 __ 7.6 1945 __________10.1 1963 _10.1 1963 (possibly 13-14 in 1775)

30 Apr __ 6.7 1945 __ 6.7 1945 __________10.4 1987 _10.5 1987

^ 12.0 on 6 Apr 2024 broke record of 10.6 (2014)

 

01 May __ 6.7 1979 _ 6.6 1979 _________12.1 2005 _11.8 2005

02 May __ 8.1 1979 _ 8.0 1979 _________10.3 2005 _10.5 2005

03 May __ 6.0 1892 _ 6.0 1892 _________10.5 2005 _10.8 2005

04 May __ 8.4 1979 _ 8.5 1979 _________12.5 2008 _12.6 2008

05 May __ 8.5 1979 _ 8.4 1979 _________11.0 2008 _11.2 2008

06 May __ 8.6 1932 _ 8.6 1932 _________11.1 1962 _11.1 1958,62

07 May __ 6.7 1879 _ 6.4 1879 _________12.3 2011 _12.4 2011

08 May __ 8.1 1904 _ 7.8 1904 _________13.5 2011 _13.7 2011

09 May __ 8.3 1883 _ 8.2 1883 _________14.2 1945 _14.2 1945

10 May __ 8.6 1883 _ 8.6 1883 _________13.1 2016 _13.3 2016

11 May __ 9.0 1886 _ 9.4 1995 _________12.5 2016 _12.7 2016

12 May __ 8.7 1897 _ 9.5 1886,1897 _____13.0 1959 _13.0 1959

13 May __ 6.7 1915 _ 7.1 1915 _________14.1 1945 _14.1 1945

14 May __ 9.1 1935 _ 9.2 1935 _________11.8 1969,92 _11.6 1943,47,92,98

15 May __ 9.3 1879 _ 9.6 1879,1941 _____13.2 2000 _13.2 2000

16 May __ 7.9 1935 _ 7.9 1935 _________12.2 2017 _12.3 2017 (possibly 14-15 in 1833)

17 May __ 8.5 1995 _ 8.6 1935 _________12.7 2002 _12.6 2002

18 May __ 9.4 1996 _ 9.6 1996 _________13.1 1997 _13.1 1896

19 May __ 9.7 1894 _ 9.8 1894 _________13.1 1888 _12.7 1888

20 May __ 8.8 1907 _ 9.3 1906 _________12.1 2014 _12.3 2014

21 May __ 9.5 1891 _ 9.4 1891 _________12.1 1916 _11.9 1922

22 May __ 9.9 1954 _ 9.8 1954 _________13.5 2020 _13,6 2020

23 May __ 8.3 1948 _ 8.2 1948 _________13.0 1953 _13.0 1953

24 May __10.1 1891_ 9.4 1891 _________13.1 2017 _13.2 2007

25 May __ 9.8 1899 _10.2 1899,1950 ____14.3 1953 _14.3 1953

26 May __ 8.8 1962 _ 8.9 1962 _________12.9 2019 _13.0 2019

27 May __ 9.5 1984 _ 9.6 1984 _________13.6 1892,2017 _14.0 1892

28 May __10.5 1983_10.3 1923 ________14.1 2001 _14.0 2001

29 May __11.3 1887_11.4 1887,1923 ____13.4 1928 _13.6 1928

30 May __11.2 1975_11.3 1975 ________ 14.6 1944 _14.5 1944

31 May __11.3 1923_11.1 1880 ________ 14.1 1895 _15.1 1895

 

01 Jun __10.4 1964_10.4 1964 _________ 15.3 1947 _15.3 1947

02 Jun __10.6 1964_10.6 1964 _________ 14.6 1947 _14.5 1947

03 Jun __10.5 1923_10.5 1936 _________ 16.4 1947 _16.4 1947

04 Jun __12.3 1923,32,94_12.0 1923 _______ 14.9 1947 _14.9 1947

05 Jun __12.6 1888_12.5 1888,1929 ______15.9 1980 _15.8 1980

06 Jun __10.8 1905_10.7 1985 _________ 15.2 1982 _15.1 1982

07 Jun __11.4 1891_11.5 1891 _________ 14.7 1950 _14.6 1950

08 Jun __10.1 1897_10.5 1897 _________ 15.1 1983 _14.9 1983

09 Jun __11.8 1902_12.0 1902 _________ 14.8 1982 _14.7 1982

10 Jun __11.4 1977_11.3 1977 _________ 14.9 1993 _14.8 1993

11 Jun __11.7 2019_11.6 2019 _________ 15.9 2006 _15.9 2006

12 Jun __12.6 1892_12.7 1892,1902 _____ 15.8 2006 _15.9 2006

13 Jun __12.1 1903_12.0 1903 _________ 15.2 1989 _15.0 1989

14 Jun __10.1 1903_10.5 1903 _________ 13.7 1951 _13.8 1951

15 Jun __12.3 1923_11.9 1903 _________ 14.3 2004 _14.1 1981,2004

16 Jun __12.1 1923_11.7 1923 _________ 14.7 1896 _14.7 1896

17 Jun __12.6 1977_12.5 1977 _________ 14.9 1896 _15.5 2005

18 Jun __12.2 1977_12.1 1977 _________ 15.1 1930 _15.6 2005

19 Jun __12.2 1903_13.2 1903 _________ 15.2 2000,05 _16.2 2005

20 Jun __12.2 1903_12.4 1903 _________ 15.8 2005 _15.4 1936,2005

21 Jun __14.5 1972_14.5 1972 _________ 16.0 1936 _16.1 1936

22 Jun __14.8 1980_14.8 1882 _________ 17.2 1941 _17.3 1941

23 Jun __13.5 1978_13.4 1978 _________ 15.6 1935 _15.6 1935

24 Jun __13.1 1939_13.2 1939 _________ 16.0 1935 _16.1 1935

25 Jun __12.3 1909_12.2 1909 _________ 16.6 1935 _16.6 1935

26 Jun __12.0 1997_12.1 1997 _________ 16.2 2020 _16.3 2020

27 Jun __12.8 1974_12.7 1974 _________ 16.0 1878,2011 _16.0 2011

28 Jun __13.8 2017_13.7 2017 _________ 16.0 1878 _16.1 1878

29 Jun __14.1 1906_14.2 1906 _________ 16.5 1987 _16.3 1987

30 Jun __13.7 1919_14.1 1919 _________ 16.4 1952 _16.4 1952

 

01 Jul __13.9 1919_14.3 1919 _________ 17.1 1968 _17.1 1968

02 Jul __14.7 1912_14.8 1912 _________ 16.9 1952 _17.0 1952

03 Jul __13.5 1907_13.3 1907 _________ 16.5 1999 _16.4 1999

04 Jul __15.0 1879_14.9 1879 _________ 18.0 1976 _17.8 1976

05 Jul __12.5 1920_12.9 1978 _________ 16.4 1976 _16.3 1939,76

06 Jul __13.7 1888_13.8 1888 _________ 16.7 1991,2001 _16.7 2001

07 Jul __13.7 1888_13.7 1888 _________ 16.7 1989 _16.5 1989

08 Jul __14.3 1907_14.2 1907 _________ 16.4 1893 _16.0 1970

09 Jul __13.9 1879_14.1 1879,1948 _____ 16.4 1999 _16.2 1999

10 Jul __15.0 1907,93_15.1 2000 ________16.1 1923 _15,9 2016

11 Jul __13.7 1888_13.4 1888 _________ 16.8 1923 _16.9 1923

12 Jul __13.4 1879_14.0 1879 _________ 17.0 1887 _17.0 1887

13 Jul __14.6 1956_14.6 1956 _________ 17.9 1941 _17.9 1941

14 Jul __14.8 1892_15.5 1988 _________ 16.5 1975 _16.3 1975

15 Jul __14.5 1888_14.6 1888 _________ 16.8 1926 _16.2 1926

16 Jul __14.9 1915,22_15.0 1915 _______ 16.8 2003 _16.6 2003

17 Jul __12.9 1892_13.2 1892 _________ 16.2 2003 _16.0 2003

18 Jul __13.6 1892_13.9 1892 _________ 15.9 1937 _16.3 1878

19 Jul __14.0 1892_14.0 1892 _________ 17.6 1995 _18.9 2022*

20 Jul __14.9 1902_14.8 1902 _________ 19.4 2016 _19.5 2016

21 Jul __13.5 1902_13,5 1902 _________ 15.8 2006 _16.0 2006

22 Jul __13.6 1930_13.9 1930 _________ 17.0 2006 _17.1 2006

23 Jul __13.8 1930_14.1 1930 _________ 17.7 1925 _17.5 1900,25

24 Jul __14.9 1981_14.8 1981 _________ 17.7 2019 _17.9 2019

25 Jul __14.9 1920_15.3 1914,20 ______ 16.2 2019 _16.4 2019

26 Jul __14.9 1920_15.0 1962 _________ 17.8 2006 _18.0 2006

27 Jul __14.9 1886_14.9 1886 _________ 17.2 1949 _17.2 1949

28 Jul __15.3 1888_14,9 1888 _________ 17.0 1947 _17.0 1947

29 Jul __15.2 1898_15.1 1898 _________ 18.8 1948 _18.8 1948

30 Jul __15.4 1898,1965_15.4 1965 _______ 17.5 1911 _16.9 1911

31 Jul __13.8 1912_14.3 1912 _________ 16.5 1995 _17.4 2022*

* V2.0 records in 2022 have no CET legacy equivalents. 19th July 1995 was 17.4 in v2.0. 31st July was 16.3 and other years at 16.5 had taken that record before 2022 broke through. (see also August notes)

 

01 Aug __14.9 1917_14.9 1917 _________ 17.9 1995 _17.8 1995

02 Aug __14.2 1912_13.4 1912 _________ 17.8 1995 _17.7 1995

03 Aug __14.9 1986_15.0 1986 _________ 16.5 1933,95 _17.4 2022* 

04 Aug __15.0 1920_15.3 1920 _________ 17.2 1904 _16.9 1933,94

05 Aug __15.0 1941_15.0 1941 _________ 18.5 1975 _18.5 1975

06 Aug __15.2 1977_15.2 1977 _________ 16.5 2003 _16.6 2003

07 Aug __14.6 1898_14.6 1898 _________ 16.3 2016 _16.5 2016

08 Aug __13.6 1902_14,5 1902 _________ 16.6 1938 _16.7 1938

09 Aug __13.7 1900_14.0 1900 _________ 18.5 2004 _18.5 2004

10 Aug __15.6 1892_15.7 1931 _________ 16.4 2003 _16.4 2003

11 Aug __15.1 1960_15.1 1960 _________ 18.8 1997 _18.8 1997

12 Aug __13.9 1881_14.1 1881 _________ 18.2 2020 _18.5 2020

13 Aug __13.5 1881_13.6 1881 _________ 17.7 2020 _18.0 2020

14 Aug __14.1 1912_14.3 1912 _________ 16.4 2001 _16.7 2001

15 Aug __14.5 1957_14.6 1957 _________ 15.8 1893,2012,13 _16.9 2022*

16 Aug __12.0 1888_13.1 1888 _________ 15.4 1909 _15.5 1926

17 Aug __14.2 1888_14.2 1888 _________ 15.9 2012 _16.1 2012

18 Aug __14.8 1952_14.9 1952 _________ 16.4 1944 _16.4 1944

19 Aug __14.5 1954_14.4 1954 _________ 17.0 1955 _17.0 1955

20 Aug __14.6 1903_14.9 1920 _________ 16.4 1932,97 _16.4 1932

21 Aug __14.7 1944_14.5 1920 _________ 16.5 1997 _16.5 1997

22 Aug __14.3 1904_14.5 1993 _________ 16.5 1997 _16.5 1997

23 Aug __14.5 1979_14.5 1979 _________ 16.3 1997 _16.4 2015

24 Aug __13.8 1931_13.8 1931 _________ 16.4 2003 _18.0 2022*

25 Aug __14.3 1956_14.2 1956 _________ 16.4 1959,95 _16.4 1959,95

26 Aug __12.3 1912_12.7 1912 _________ 15.8 2000 _15.9 2000

27 Aug __13.8 1885_14.3 1885 _________ 15.9 1911 _15.7 1911,30

28 Aug __14.1 1888_14.4 1888 _________ 16.2 1942 _16.2 1942

29 Aug __12.5 1919_12.3 1919 _________ 16.5 1942 _16.4 1942

30 Aug __14.1 1885_14.1 1885 _________ 16.4 2008 _16.6 2008

31 Aug __13.2 1881_13.2 1881 _________ 17.1 1984 _17.1 1984

* V2.0 records in 2022 have no CET legacy equivalents. 3rd Aug 1933 was 16.5 and 1995 was 16.3 in v2.0. 31st July was 16.3 and other years at 16.5 had taken that record before 2022 broke through. For 15th August, 2012 had broken the tie in v2.0 (16.1) before the 2022 record removed it. 24 Aug 2003 was also 16.4 C in v2.0 before that was broken in 2022. 

 

01 Sep __13.3 1881 _13.5 1881 ________ 16.4 1984 __ 16.4 1984

02 Sep __13.5 1915 _14.2 1915 ________ 16.3 1939 __ 16.3 1939

03 Sep __11.7 1908 _11.9 1908 ________ 16.5 1939 __ 16.6 1939

04 Sep __12.2 1908 _12.4 1908 ________ 14.7 1973 __ 15.4 2022*

05 Sep __12.7 1931 _12.7 1931 ________ 18.4 1949 __ 18.4 1949

06 Sep __13.0 1952 _13.0 1952 ________ 16.1 1898,1958_ 16.2 1898

07 Sep __12.5 1952 _11.9 1952 ________ 16.2 2016 __ 17.7 2023*

08 Sep __12.3 1909 _12.2 1909 ________ 15.9 2009 __ 16.0 1898,2009

09 Sep __12.5 1952 _12.6 1912,52,72 ___ 15.4 2021 __ 16.6 2023* 15.5 2021

10 Sep __12.9 1912 _12.2 1912 ________ 15.9 2011 __ 16.1 2023* 16.0 2011

11 Sep __11.4 1912 _11.7 1912 ________ 15.8 2021 __ 15.9 2021

12 Sep __13.1 1948 _12.9 1922 ________ 17.3 1945 __ 17.2 1945

13 Sep __12.6 1909 _12.6 1909 ________ 15.9 2006 __ 16.0 2006

14 Sep __12.0 1975 _11.8 1975 ________ 16.1 2016 __ 16.2 2016

15 Sep __11.4 1994 _11.4 1994 ________ 14.6 1932 __ 14.5 1947

16 Sep __13.0 1976 _12.9 1976 ________ 16.1 1961 __ 16.1 1961

17 Sep __11.8 2013 _11.8 2013 ________ 15.4 1926 __ 15.0 1926,45

18 Sep __11.1 1952 _11.2 1952 ________ 14.9 1945 __ 14.9 1945

19 Sep __12.1 1912 _11.7 1919 ________ 14.8  2014 __ 15.0 2014

20 Sep __11.6 1977 _11.5 1977 ________ 15.9 1947 __ 15.8 1947

21 Sep __11.5 1948 _11.5 1948 ________ 15.7 2006 __ 15.8 2006

22 Sep __11.8 1948 _11.7 1889 ________ 14.8 1989 __ 14.7 2006

23 Sep __11.0 1893 _11.1 1893 ________ 15.1 1956 __ 15.1 1956

24 Sep __11.9 1889 _12.2 1972,2010 ____ 14.9 2006 __ 15.0 2006

25 Sep __12.2 1885,88_11.9 1888 _______ 14.6 1895 __ 14.5 1936

26 Sep __10.7 1926 _10.6 1926 ________ 14.1  1976 __ 14.1 1967

27 Sep __ 9.8 1974 __ 9.6 1974 ________ 14.2 1913,41_ 14.6 1913

28 Sep __11.1 1974 _10.9 1974 ________ 15.0 1948 __ 15.0 1948

29 Sep __ 8.3 1918 __ 8.2 1918 ________ 15.7 1908 __ 15.4 1908

30 Sep __10.1 1918 _10.1 1918 ________ 14.8 1908 __ 14.8 1923

* 4 Sep 1973 was also 14.7 in v2.0, broken by 15.4 in 2022. 

* 7 Sep 2016 at 16.3 in v2.0, broken by 17.7 in 2023. 

(8 Sep 2023 at 15.4 failed to break existing record)

* 9 Sep 2021 at 15.5 in v2.0, broken by 16.6 in 2023. 

*10 Sep 2011 at 16.0 in v2.0, broken by 16.1 in 2023.

01 Oct __10.3 1888 _10.3 1888 _________ 14.8 1985 __ 14.6 1985 

02 Oct __ 7.9 1888 __7.6 1888 __________ 13.8 1954 __ 13.8 1954

03 Oct __ 8.5 1923 __8.5 1923 __________ 15.4 2011 __ 15.3 2011

04 Oct __ 8.4 1880 __8.1 1880 __________ 15.0  2013 __ 14.9 2013

05 Oct __ 9.6 1888 __9.7 1888 __________ 14.1 1886 __ 14.2 1886

06 Oct __ 8.6 1888 __8.6 1888 __________ 13.8 1990 __ 13.7 1990

07 Oct __ 9.9 1904 __9.9 1888 __________ 13.8 1878 __ 13.7 1900

08 Oct __10.1 1892 _10.2 1881,92 _______ 13.2 1969 __ 13.2 1969,2005

09 Oct __ 8.8 1887 __8.7 1887 __________ 14.7 1967 __ 14.7 1967

10 Oct __ 8.2 1980 __7.9 1980 __________ 14.4 1921,2011_14.3 1921,2011 

11 Oct __ 6.0 1896 __6.1 1896 __________ 14.2 2011 __ 14.6 2005

12 Oct __ 7.4 1887 __7.2 1887 __________ 15.2 2005 __ 15.1 2005

13 Oct __ 8.0 1971 __8.0 1971 __________ 15.1 2018 __ 14.9 2018

14 Oct __ 8.8 1925 __8.7 1925 __________ 15.2 2017 __ 15.1 2017

15 Oct __ 7.6 1879 __7.6 1879 __________ 14.2 1893 __ 14.2 1893

16 Oct __ 7.8 1905,80_7.5 1980 __________ 13.1 1954 __ 13.1 1954

17 Oct __ 7.7 1905 __7.8 1905 __________ 13.0 1897 __ 12.9 1897

18 Oct __ 7.8 1926 __7.8 1926 __________ 14.7 2014 __ 14.5 2014

19 Oct __ 6.9 1896 __7.1 1896 __________ 14.1 2014 __ 14.0 2014

20 Oct __ 5.4 1880 __5.3 1880 __________ 12.2 1941 __ 12.2 1941,2023

21 Oct __ 6.3 1926 __6.1 1926 __________ 13.1 2020 __ 13.0 2020

22 Oct __ 5.7 1895 __5.6 1895 __________ 13.7 1906 __ 13.5 1906

23 Oct __ 6.2 1895 __6.3 1895 __________ 12.8 1998 __ 12.6 1998

24 Oct __ 6.2 1895,1926_6.3 1926 ________ 11.6 2012 __ 11.4 2012

25 Oct __ 5.9 1892 __6.0 1892 __________ 12.1 1978 __ 11.9 1978

26 Oct __ 5.9 1880,95_5.2 1895 __________ 13.3 1927 __ 13.5 1927

27 Oct __ 5.4 1895 __5.8 1895 __________ 14.6 1888 __ 14.5 1888

28 Oct __ 5.6 1895 __5.4 1926 __________ 13.7 1888 __ 13.8 2022*

29 Oct __ 4.6 1895 __4.7 1895 __________ 13.2 1935 __ 13.2 1935

30 Oct __ 5.6 1881 __5.5 1974 __________ 13.2 2005 __ 13.1 2005

31 Oct __ 3.1 1934 __3.6 1934 __________ 13.1 2014 __ 13.0 2014

* in v2.0, broke 13.5 from 2005

 

01 Nov __ 3.3 1881 __3.5 1881 _________ 12.0 1894 __ 12.2 1894

02 Nov __ 5.0 1880 __4.9 1880 _________ 12.5 1894 __ 12.5 1894

03 Nov __ 5.1 1922 __4.7 1919 _________ 13.5 1996 __ 13.4 1996

04 Nov __ 3.4 1919 __3.7 1919 _________ 12.8 1931 __ 12.8 1931

05 Nov __ 3.0 1901 __3.0 1901 _________ 13.2  1938 __ 13.3 1938

06 Nov __ 5.8 1901 __5.7 1901 _________ 12.3  2015 __ 12.2 2015

07 Nov __ 3.6 1888 __3.6 1888 _________ 11.4 1972,2015_ 11.4 1972,2015 

08 Nov __ 3.4 1921 __3.5 1921 _________ 10.4 1938 __ 10.4 1938,1939

09 Nov __ 4.5 1919,21_ 4.8 1971 ________ 10.7 1994 __ 10.5 1994

10 Nov __ 3.8 1919 __3.7 1919 _________ 10.6 1977 __ 10.4 1977,2015

11 Nov __ 3.1 1919 __3.2 1919 _________ 12.7 2015 __ 12.7 2015, 2022

12 Nov __ 2.4 1919 __2.3 1919 _________ 12.4 1947 __ 12.4 1947

13 Nov __ 1.4 1919 __1.9 1919 _________ 13.1 1938 __ 13.3 1938

14 Nov __ 1.7 1919 __1.9 1919 _________ 12.1 1938 __ 12.1 1938

15 Nov __ 0.5 1965 __0.5 1965 _________ 11.3 1948 __ 11.3 1948

16 Nov __ 0.6 1901 __1.2 1901 _________ 11.4 1997 __ 11.1 1997

17 Nov __ 2.7 1930 __3.1 1930 _________ 11.3 1997 __ 11.0 1997

18 Nov __ 0.7 1887 __1.3 1887 _________ 11.3 2020 __ 11.3 2020

19 Nov __ 2.0 1902 __1.8 1902 _________ 12.0 1978 __ 11.8 1978

20 Nov __ 2.5 1962 __2.6 1962 _________ 12.0 1994 __ 11.7 1994

21 Nov __ 1.1 1880 __1.0 1880 _________ 11.7 1947 __ 11.7 1947

22 Nov __ 2.1 1880,1920_2.0 1880 ________13.5 1947 __ 13.5 1947

23 Nov __-0.5 1993 __-0.6 1993 _________12.3 1947 __ 12.3 1947

24 Nov __-0.3 1904 __ 0.8 1904 _________ 11.4 1980 __ 11.2 1980

25 Nov __ 2.3 2010 __2.2 1904,23,2010 ____ 11.1 1964 __ 11.1 1964

26 Nov __1.2 1904 __1.3 1904 __________ 11.3 1983 __ 11.2 1983

27 Nov __-0.3 1890 __-0.5 1890 __________ 9.0 1994 _ 8.8 1994,2022

28 Nov __-1.0  2010 __-1.0 2010 ________ 10.2 1917 __ 10.1 1953

29 Nov __ 0.0 1890 __ 0.2 1890 _________ 10.6 2000 __ 10.4 2000

30 Nov __ 0.4  1973 __0.5 1973 _________ 10.8 1939 __ 10.9 1939

 

01 Dec __-0.4 2010 __-0.4 2010 _________ 10.6 1939 __ 10.5 1939

02 Dec __-1.2 1879 __-1.2 1879 __________ 9.9 1985 ___ 9.7 1985

03 Dec __-0.4 1879 __-0.6 1879 _________ 11.2 1985 __ 11.1 1985

04 Dec __-1.5 1925 __-1.4 1925 _________ 10.6 1934 __ 10.6 1934

05 Dec __-0.6 1902 __-0.4 1902 _________ 11.3 1898 __ 11.4 1898

06 Dec __-1.8 2010 __-1.8 2010 _________ 10.8 1898 __ 10.6 1898

07 Dec __-0.4 2010 __-0.4 2010 __________ 9.5 1964 ___ 9.6 1964

08 Dec __-0.7 1967 __-0.7 1967 _________ 10.6 2015 __ 10.4 2015

09 Dec __ 0.8 1981 __ 0.6 1981 _________ 11.2 1934 __ 11.1 1934

10 Dec __-1.2 1981 __-1.5 1981 __________ 9.7 2016 ___ 9.6 2016 

11 Dec __-0.8 1882 __-1.5 1882 _________ 10.8 1994 __ 10.5 1994

12 Dec __-3.8 1981 __-4.0 1981 _________ 11.9 1994 __ 11.6 1994

13 Dec __-1.9 1920 __-1.3 1878,1920 _____ 10.8 1994 __ 10.6 1994

14 Dec __-2.2 1878 __-2.4 1878 _________ 10.5 2006 __ 10.4 2006

15 Dec __-0.3 1890 __ 0.4 1890,1950 ______ 9.8 1985 ___ 9.6 1985 

16 Dec __-0.3 1890 __-0.2 1981 __________ 9.1 1985 ___ 8.9 1985

17 Dec __-0.5 1981 __-0.7 1981 _________ 11.0 2015 __ 10.8 2015

18 Dec __-1.3 1927 __-1.2 1927 _________ 10.5 1932 __ 10.4 1932

19 Dec __-3.2 2010 __-3.2 2010 _________ 10.8 2015 __ 10.7 2015

20 Dec __-2.2 1938 __-2.1 1938 __________ 9.6 2015 ___ 9.5 2015 

21 Dec __-1.5 1891 __-1.4 1891 __________ 9.6 1971 ___ 9.6 1971 

22 Dec __-1.5 1891 __-2.2 1891 _________ 10.0 1991 ___ 9.8 1991 

23 Dec __-2.7 1891 __-4.0 1891 _________ 11.1 1991 __ 10.8 1991

24 Dec __-1.8 1891 __-1.4 1878 __________ 8.7 2002 ___ 9.3 2023^  

25 Dec __-2.6 2010 __-2.5 2010 __________ 9.3 1983 ___10.1 2023^  

26 Dec __-0.8 1906 __ 0.0 1906 __________ 9.7 2011 ___ 9.6 2011 

27 Dec __-0.9 1899 __-0.7 1892 __________ 8.7 1949 ___ 8.7 1949   

28 Dec __-3.0 1995 __-3.1 1995 _________ 10.2 1987 ___ 9.9 1987

29 Dec __-4.0 1908 __-4.5 1908 _________ 10.9 1987 __ 10.8 1987

30 Dec __-1.7 1890 __-1.8 1890 __________ 9.1 1925 ___ 8.9 1925  

31 Dec __-2.4 1978 __-2.6 1978 _________ 11.8 2021 __ 11.7 2021

 

^ 9.3 24 Dec replaced 8.9 (1977) in v2.0; 2002 was 8.6 in v2.0

^10.1 25 Dec replaced 9.1 (1983) in v2.0. 

Edited April 7 by Roger J Smith
new records set 15, 18 Feb, 14 15 20 Mar, 6 Apr 2024

[Roger J Smith]

Following table posted in Feb CET contest ...

... data are for 31 days ending on date reported, e.g., 8 Jan 2016 refers to 9 Dec 2015 to 8 Jan 2016. 

... *as only leap years can end on 29 Feb, 1872 (7.0) is record, but if 1779 was a leap year it would be 7.9 ending 29 Feb.

 

__Warmest 31d intervals ending on every calendar date__

 

 

date __ JAN _ FEB _ MAR _APR _ MAY _ JUN _JUL _ AUG _ SEP _OCT _ NOV _ DEC

_01 __ 2016 _1916_1779_1957_2011_1833_1846_2006_1997_2023_2001_1994

________9.5 __ 7.4 __ 7.9 __ 9.3 _11.9 _15.3 _18.1 _ 19.7 _18.9 _17.0 _13.1 _ 9.8

 

_02 __ 2016 _1796_1779_1957_2011_1833_1846_2006_1997_2023_2005_1994

________9.3 __ 7.3 __ 7.9 __ 9.3 _11.9_15.5 _18.1 _ 19.6 _18.9 _16.9 _13.1 __ 9.8

 

_03 __ 2016 _1796_1779_1957_2011_1833_1846_2006_1997_2023_2005_1994 

________9.2 __ 7.2^__ 7.8 __ 9.4 _11.7 _15.4 _18.1 _ 19.6 _18.9 _16.8 _13.3 __ 9.8

 

_04 __ 2016 _1796_1779_1957_2011_1833_1846_1995_1997_2023_2005_1994

_________9.1 __ 7.2^__ 7.9 __ 9.6 _11.7 _15.4 _18.2^_19.6 _18.9 _16.6 _13.2 __ 9.8

 

_05 __2016 _1796,1834_1779_1957_2011_1833_1976_1995_1997_2023_2005_1994

_________9.1 __ 7.1^ __ 8.1 __ 9.9 _11.9 _15.3^_18.5 _19.6 _18.8 _16.5 _13.1 __ 9.6

 

_06 __2016_ 1990_1779_1957_2011_1833_ 1976_1995_2022_2023_2005_1994

_________8.9 __ 7.1 __ 8.2 __ 9.9 _12.0 _15.4 _18.8 _19.6 _18.8 _16.3 _13.1 __ 9.4 

 

_07 __ 2016 _1990_1779_1957_2011_1833_ 1976_1995_2022_2023_2005_1994

_________8.7 __ 7.1^__ 8.2 __ 9.8 _12.1 _15.5 _19.0 _19.6 _18.8 _16.2 _12.9 __ 9.4

 

_08 __ 2016 _2002_1779_1957_2011_1833_ 1976_1995_2022_2023_2005_1994

_________8.5 __ 7.2^__ 8.2 __ 9.7 _12.2 _15.5 _19.1 _19.5 _18.7 _16.0 _12.8 __ 9.3

 

_09 __ 2016 _2002_1779_2024_2011_1833_ 1976_1995_2022_2023_2005_1994

_________8.5 __ 7.4 __ 8.1 __ 9.7^_12.2^_15.6 _19.0 _19.4 _18.6 _15.8^_12.8 __ 9.2

 

_10 __ 2016 _2002_1779_2024_2011_1833_ 1976_1995_2022_2006_2005_1994

_________8.4 __ 7.6 __ 8.0 __ 9.8 _12.3 _15.7 _19.0^_19.3 _18.5 _15.8 _12.6 __ 9.1

 

_11 __ 2016 _2002_1998_2024_2011_1833_ 1976_1995_1947_2006_2005_1994

_________8.3 __ 7.8 __ 7.9 __9.8^_12.3 _15.7 _19.1^_19.4 _18.4 _15.7 _12.5 __ 9.2

 

_12 __ 2016 _2002_2019_2024_2011_1992_ 1976_1995_1947_2006_2022_1994

_________8.3 __ 8.0 __ 7.8^_10.0^_12.3 _15.5^_19.3 _19.4 _18.3 _15.5 _12.3 __ 9.2

 

_13 __ 2016 _2002_1961_2024 _2011_1822_ 1976_1995_1947_1949_2022_1994

_________8.2 __ 8.0 __7.9^__10.2 _12.3 _ 15.7 _19.4 _19.4 _18.2 _15.5^_12.3 _ 9.3

 

_14 __ 2016 _2002_2019_2024_2011_1822_ 1976_1995_1947_1949_2022_1994

_________8.1^__ 7.9 __8.0^_10.2^_12.4 _ 15.9 _19.5 _19.4 _18.0 _15.2 _12.3 _ 9.0

 

_15 __ 1975 _2002_2019_2024_1893_1822_ 1976_2022_1947_1949_2022_1994

_________8.1 __ 7.8 __ 8.1 _10.0^_12.6 _16.1 _19.5 _19.5^_18.0 _15.2 _12.2 _ 8.7

 

_16 __ 1975 _2002_2019_1945_1893_1822_ 1976_1995^_1947_1949_2022_1994

_________8.1 __ 7.7 __ 8.2 __10.2 _12.8 _16.2 _19.6 _19.6 _17.9 _15.2 _12.1 _ 8.4

 

_17 __ 1975 _2002_2019_1945_1893_1846_ 1976_1995_2023_1949_2022_1994

_________8.0 __ 7.7 __ 8.2 __10.3^_12.9 _ 16.2 _19.7 _19.7 _17.6^_15.1 _12.0 _ 8.4

 

_18 __ 1975 _2002,24_1990_1945_1893_1846_ 1976_1995_2023_1949_2022_1994

_________7.9 __  7.7 __  8.3 __10.6 _13.1 _ 16.5 _19.8 _19.8 _17.5 _15.0 _11.9 _ 8.3

 

_19 __ 1975 _2024_1990_1945_1893_1846_ 1976_1995_2023_1949_2022_1828

_________7.8 __ 8.1 __ 8.5 __10.7 _13.1 _ 16.8 _19.9 _19.9&_17.4 _14.9 _11.8 _8.5^ _ 

 

_20 __ 1975 _2024_1990_1945_1893_1846_ 1976_1995_2023_1949_2022_1828

_________7.7^__ 8.3 __ 8.6 __11.0 _ 13.1 _ 17.2 _20.0 _19.9 _17.3 _14.8 _11.6 _8.5

 

_21 __ 1916 _2024_1990_1945_1833_1846_ 1976_1995_2023_1949_2022_1828

_________7.6 __ 8.3 __ 8.7 __11.0 _ 13.3 _ 17.4 _20.0 _20.0 _17.2 _14.6 _11.3 _8.6^

 

_22 __ 1916 _2024_1990_2011_1833_1846_ 1976_1995_2016_1949_ 2022 _2015

_________7.7 __ 8.3 __ 8.7 __11.0 _ 13.6 _ 17.7 _20.1 _20.2 _17.0^_14.5 _11.1 _8.8

 

_23 __ 1916 _2024_1990_2011_1833_1846_ 1976_1995_2016,23_1949_2022_2015

_________7.6 __ 8.2^__ 8.6 __11.2 _13.8 _ 17.7 _20.0 _20.3 _16.8^_14.2 _10.9 _ 9.0

 

_24 __ 1916 _2024_1990_2011_1833_1846_ 1976_1995_2006,23_1949_2022_2015

_________7.6 __ 8.0 __ 8.6 __11,3 _14.0 _ 17.7 _19.8 _20.2 _16.7^_13.9^ _10.7 _ 9.2

 

_25___ 1916 _2024_1990_2011_1833_1846_ 1976_1995_2006_2001_2022_2015

_________7.6 __ 7.9 __ 8.5^__11.4 _14.2 _ 17.7 _19.7 _20.2_16.8^_13.8^_10.6 _ 9.3

 

_26 __ 1916 _2024_1957_2011_1833_1846_ 1976_1995_2023_1921_1994_2015

_________7.6 __ 7.8 __ 8.7 __11.5 _14.5 _ 17.8 _19.6 _20.1 _16.8^_13.7 _10.4 _ 9.4

 

_27 __ 1916 _1869_1957_2011_1833_1846_ 1976_1995_2023_1921_1994_2015

_________7.6 __ 7.7 __ 8.8 __11.6 _14.5 _ 17.8 _19.5 _20.0 _16.9 _13.8 _10.4 _ 9.4

 

_28 __ 1916 _1779_1957_2011_1833_1846_ 2006_1995_2023_2001_1994_2015

_________7.7 __ 7.7 __ 8.9 __11.6 _14.6 _ 18.0 _19.7 _19.7 _16.9 _13.7 _10.3 _ 9.4

 

_29 __ 1916_1872* 1957_2011_1833_1846_ 2006_1995_2006,23_2001_1994_2015

_________7.8 __7.0* __9.0 __11.8 _14.7 _ 18.1 _19.8 _19.5_16.87_13.6 _10.2 _ 9.6

 

_30 __ 1916 _ xxxx _1957_2011_1833_1846_ 2006_1995_2023_2001_1994_2015

_________7.7 __-- -- __9.1 __11.9 _14.9 _ 18.1 _19.8 _19.3 _16.9 _13.4 _10.0 _ 9.7

 

_31 __ 1916 _xxxx _1957_xxxx_1833_xxxx_  2006_1995_xxxx_2001_ xxxx_2015

_________7.6 __-- -- __9.2 __-- -- __15.1 _ -- -- _ 19.8 _ 19.1 _-- -- _13.2 _-- --  _ 9.6

________________________

So, while there are only 12 years with the distinction of holding a warmest month, there are many years that have at least one warmest 31-day interval (or are tied in one decimal). Several years (incl 1846, 1976, 1990, 2006, 2011, 2015, 2022) produced two entirely separate ones, and 2006 also participates in a third near miss in mid-January of 2007. 

Note: intervals ending 10-14 Apr 2024 broke 2017 records of 9.6, 9.5, 9.5, 9.6, 9.6 and ending 9 Apr 1957 9.6. (also broke 15 Apr 1945 9.8)

 

^ years tied in one decimal (and a few near misses)

 

15 Dec - 14 Jan (2015-2016 _ 8.13) (1974-1975 8.08)

21 Dec - 20 Jan (1974-1975 _ 7.65) (1975-1976 7.48 ... stays 0.1 to 0.2 lower than 1915-1916 run for several days.

... ... ... Peak is 7.57 for 23 Dec to 22 Jan 1976

... ... 1920-1921 also approaches but does not overtake 1915-1916 (peak 25 Dec 1920 - 24 Jan 1921 is 7.56). 

 4 Jan - 3 Feb 1796 (7.22) _ 1916 (7.17)

 5 Jan - 4 Feb 1796 (7.14) _ 1834 (7.13)

 6 Jan - 5 Feb 1796,1834 (7.10) _ 1846 (7.06)

 8 Jan - 7 Feb 1990 (7.08) _ 2002 (7.06)

 9 Jan - 8 Feb 2002 (7.18) _ 1990 (7.16)

24 Jan - 23 Feb 1903 (7.44) _ 2002 (7.40) both lost out to 8.18 2024

10 Feb - 12 Mar 2019 (7.81) _ 1998 (7.80). 1961 (7.77).  2007 (7.75)

11 Feb - 13 Mar 1961 (7.89) _ 2007, 2019 (7.85)

12 Feb - 14 Mar 2019 (8.01) _ 1961 (7.95)

23 Feb - 25 Mar 1990 (8.51) _ 1957 (8.50)

10 Mar - 9 Apr 1957 (9.60) _ 2017 (9.56) _ broken by 2024 (9.73)

11 Mar - 10 Apr 2017  9.6 (not tied) _ 2024 9.81

12 Mar -11 Apr 2017 (9.50) _ 2011 (9.47) _ broken by 2024 (10.02)

13 Mar -12 Apr 2017 (9.49) _ 2011 (9.45) _ broken by 2024 (10.23)

15 Mar -14 Apr 2011 (9.60) _ 1803 (9.58) _ broken by 2024 (10.15)

16 Mar -15 Apr 1945 (9.84) _ 1803 (9.77) _ broken  by 2024 (10.03)

18 Mar -17 Apr 1945 (10.30) _ 1803 (10.28)

09 Apr - 09 May 2011 (12.23) _ 2007 (12.15) _ after several days within 0.1, this was only one dec tie, next day was 0.02 diff (12.25-12.23) ...

... ... note also 1775 was close to level by end of 2011 run, but as it passed 2011, 1893 began a week-long run (1775 was 0.1 back for 14 Apr - 14 May

... ... and peaked at 12.64 for 17 Apr - 17 May (but 1833 was already up to 12.93) . 

06 May - 05 June 1833 (15.32) _ 1947 (15.25)

13 May - 12 June 1992 (15.54) _ 1833 (15.52) _ 1822 (15.49)

04 June - 04 July 1846 (18.20) _ 1976 (18.18)

11 June - 11 July 1826 peaked 18.90 (rounded to 18.9 four intervals 9-12 Jun to 9-12 July)

27 June - 27 July 2006 (19.47) _ 1976 (19.45) _ also (not tied) 2018 _ 19.42

 2 July - 1 Aug 1983 peaked at 19.44 (not a record, 2006 was 19.69

 4 July - 3 Aug 1995 (19.34) _ 2006 (19.31) _ also (not tied) 2018 _ 19.22

15 July - 14 Aug 2022 (19.50) _ 1995 (19.49) _ note 2003 peaked 13,14  July - 12,13 Aug at 19.10,

... ... ... 1990 also peaked at 18.53 13 Jul - 12 Aug. (2019 10 Jul - 9 Aug 18.35)

16 July - 15 Aug 1995 (19.61) _ 2022 (19.55) _ also 1975 (18.96) peaked

__ note& 20, 21 July - 19, 20 Aug 1911 peaked at 19.46

11 Aug - 10 Sep ... 1898 peaked at 17.61, and stayed about 0.8 below record pace to 0.3 below records by 23 Aug-22 Sep

18 Aug - 17 Sep _ 2023 (17.61) _ 1947 (17.60)

23 Aug - 22 Sep _ 2016 (17.02) _ 2023 (16.96) _ 1865 peaked two days earlier at 16.96 (not a record)

24 Aug - 23 Sep _ 2016,2023 (16.79) _ 1949 (16.76)

25 Aug - 24 Sep _ 1949, 2006 (16.70) _ 2023 (16.69)

26 Aug - 25 Sep _ 2006 (16.79) _ 2023 (16.76) 

27 Aug - 26 Sep _ 2023 (16.80) _ 2006 (16.78)

30 Aug - 29 Sep _ 2006,23 (16.87) _ 1949 was 16.53, staying 0.1-0.3 below all records since it tied a record 25 Aug-24 Sep.

31 Aug - 30 Sep _ 2023 (16.89) _ 2006 (16.85) ... 2006 began to fall off 2023 pace but returned to record status later.

 9 Sep - 9 Oct _ 2023 (15.81) _ 2006 (15.75)

13 Sep - 13 Oct _ 1949 (15.34) _ 2006 (15.30)

24 Sep - 24 Oct _ 1949 (13.94) _ 2001 (13.85) _ note 1921 was close to record pace for previous ten days, 0.2 to 0.4 below 1949.

25 Sep - 25 Oct _ 2001 (13.82) _ 1949 (13.75)

Oct-Nov 2022 run wiped out runs for 2015 and 1978; 1938 was not a factor, only a 20-day spike in CET values 1-20 Nov.

18 Nov - 18 Dec 2015 (8.38) _ 1828 (8.37)

19 Nov - 19 Dec 1828 (8.47) _ 2015 (8.45)

21 Nov - 21 Dec 1828 (8.63) _ 2015 (8.58) _ 1934 (8.45)

___________________

If we did not have a calendar we would probably consider all of date 31-day averages equally valid. Our calendar is basically a sort of blend of lunar cycle and annual cycle, and has no real special significance (I figure 1828's obscure 3-day run Nov-Dec is just as valid as July 2006, or Feb 1779, but who knew it was hiding in the data? ... various other surprises were found in years like 1803). 

Edited 3 hours ago by Roger J Smith
new records ending 9-14 April 2024