Daily C.E.T. Average Values 1772-2011

Roger J Smith · January 31, 2016

Maximum daily precipitation (mm) 1931-2019 Central England

DATE __ JAN ________ FEB ________ MAR _______ APR ________ MAY _______ JUN

01 _____ 9.0 (1958) __ 15.8 (1979) ___ 8.6 (1987) __ 15.3 (2018.)__ 12.7 (1948) __ 11.4 (1999)

02 ____ 15.4 (1998) __ 10.4 (1950) __ 14.8 (2007) __ 17.0 (2000) __ 12.6 (1977) __ 15.9 (1958)

03 ____ 15.0 (1980) __ 11.1 (1947) ___ 9.8 (2016) __ 17.4 (2012) __ 11.4 (1973) __ 13.4 (2012)

04 _____ 9.3 (2001) __ 12.9 (2001) __ 19.0 (1942) ___ 9.5 (1987) __ 12.2 (2015) __ 11.8 (1985)

05 ____ 10.9 (1951) __ 12.2 (1935) __ 12.2 (2019) __10.2 (1970) __ 24.8 (1978) __ 21.8 (1931)

06 ____ 23.3 (1959) __ 13.6 (2014) __ 16.1 (1982) __ 14.5 (1949) __ 12.6 (1955) __ 22.2 (1985)

07 _____ 9.4 (1986) __ 12.9 (1966) __ 17.7 (1941) __ 11.4 (1987) __ 12.6 (1975) __ 13.9 (2009)

08 ____ 23.2 (1992) __ 14.3 (1946) __ 17.9 (2016) ___ 8.5 (1951) __ 11.0 (1997) __ 12.5 (1956)

09 ____ 12.8 (2007) __ 14.5 (2009) __ 18.7 (1981) __ 25.4 (1998) __ 11.7 (1992) __ 10.6 (1957)

10 ____ 20.4 (1948) __ 11.7 (1977) ___ 9.2 (1981) __ 18.3 (1983) __ 13.8 (2016) __ 32.4 (2019)

11 ____ 16.3 (2008) __ 10.8 (1996) __ 11.1 (1937) __ 10.7 (2000) __ 14.2 (1937) __ 18.4 (1997)

12 _____ 8.6 (1969) ___ 9.8 (1950) __ 23.0 (1947) __ 15.7 (1970) __ 13.5 (1960) __ 20.2 (2019)

13 ____ 14.9 (1993) __ 13.1 (2013) __ 11.3 (1951) __ 10.7 (1956) __ 21.5 (2007) __ 13.3 (1952)

14 ____ 10.3 (1939) ___ 9.1 (2006) __ 29.2 (1964) __ 11.3 (1992) __ 21.4 (1985) __ 22.7 (2007)

15 ____ 17.1 (2008) ___ 7.0 (1944) __ 23.8 (2008) __ 14.1 (2016) __ 12.0 (1958) __ 15.1 (1978)

16 _____ 8.9 (1955) ___ 8.5 (1951) __ 13.0 (1979) __ 14.6 (1959) __ 11.7 (1949) __ 15.8 (1974)

17 ____ 11.6 (2007) __ 10.7 (1936) __ 14.1 (1980) __ 13.2 (1950) __ 26.4 (1955) __ 10.2 (1966)

18 ____ 15.0 (2003) __ 14.7 (1966) ___ 8.5 (1986) __ 16.0 (1975) __ 13.3 (1953) __ 15.8 (1971)

19 ____ 11.8 (1995) __ 10.6 (1966) __ 10.3 (1964) ___ 9.5 (1966) __ 10.2 (1986) __ 35.6 (1973)

20 ____ 11.4 (1969) __ 11.8 (1969) __ 16.0 (1965) __ 10.6 (1983) __ 19.5 (1979) ___ 8.3 (1933)

21 ____ 12.8 (1988) ___ 7.4 (1935) __ 10.1 (1975) __ 11.3 (1962) __ 26.6 (1932) __ 20.8 (1936)

22 ____ 13.4 (1956) __ 11.5 (1936) __ 10.3 (1932) ___ 8.5 (2006) ___ 9.8 (2014) __ 21.8 (1982)

23 ____ 15.7 (1984) ___ 9.8 (1957) __ 11.0 (1984) __ 23.9 (1971) __ 16.0 (1948) __ 15.2 (1960)

24 ____ 17.5 (1960) __ 20.0 (1958) __ 12.4 (1964) __ 13.2 (1981) __ 13.8 (2018.)__ 23.6 (2007)

25 ____ 23.9 (1939) __ 11.7 (2011) __ 14.8 (1941) __ 22.6 (1981) __ 10.8 (1968) __ 18.7 (1997)

26 ____ 17.7 (1940) __ 11.2 (1933) ___ 8.9 (1955) __ 22.3 (1981) __ 18.0 (1993) __ 18.6 (1958)

27 ____ 18.1 (1977) __ 14.8 (1967) __15.9 (2016) ___10.0 (2018.)__ 26.9 (2007) __ 23.6 (2017)

28 ____ 17.3 (1958) __ 11.5 (1990) __ 13.6 (1979) __ 13.0 (2004) __ 24.3 (1954) __ 16.7 (1963)

29 ____ 13.4 (1960) ___ 5.5 (1936) __ 16.5 (1963) __ 19.3 (1991) __ 14.1 (1992) __ 12.4 (1978)

30 ____ 15.5 (2004) __ (( no data )) ___14.0 (2018.)__ 12.1 (1968) __ 18.9 (1979) __ 20.0 (2003)

31 ____ 11.2 (1943) __ (( no data )) ___ 8.6 (1972) __ (( no data )) __ 18.0 (1983) __ (( no data ))

Max (1872-2018) for

month _ 122.6 (1939) _ 114.8 (1977) _ 119.5 (1947) _ 125.4 (2012) _ 122.1 (1967) _ 141.4 (2007)

... the second half of the year is posted below.

... 2016 data (Jan to June) added 11th July 2016, three new records in March, one each April & May.

.... now updated to end of June 2019 _ Mar 5 replaced 11.3 (2003).

_ 32.4 replaced 13.8 (1993) for 10 June

_ 20.2 replaced 16.2 (1954) for 12 June

Edited July 8, 2019 by Roger J Smith

Roger J Smith · January 31, 2016

(part 2 of above table)

DATE ____ JUL _________ AUG _________ SEP _________ OCT _________ NOV _________ DEC

01 ___ 19.6 (1958) __ 19.3 (1956) __ 11.0 (1968) __ 21.0 (1999) __ 19.0 (2008) __ 22.8 (1975)

02 ___ 15.1 (1936) __ 23.2 (1948) __ 12.9 (2009) __ 19.6 (1992) __ 13.8 (1940) __ 14.8 (1937)

03 ___ 15.3 (1992) __ 15.1 (1963) __ 30.0 (1931) __ 14.1 (1938) __ 19.5 (1957) __ 27.4 (1960)

04 ____ 9.0 (1974) __ 15.9 (1963) __ 12.4 (1998) __ 21.2 (2008) __ 13.8 (1957) __ 10.3 (1937)

05 ____ 9.4 (2012) __ 20.2 (1939) __ 16.1 (2008) __ 11.9 (1955) __ 25.8 (2000) __ 15.0 (1985)

06 ___ 18.5 (1963) __ 35.3 (1951) __ 15.6 (2010) __ 23.6 (1985) ___ 9.9 (2000) __ 12.4 (1992)

07 ___ 24.8 (2004) __ 16.9 (1980) ___ 9.6 (1995) __ 12.2 (1974) __ 14.7 (1935) __ 16.7 (1977)

08 ___ 14.4 (1956) __ 20.6 (1992) __ 27.9 (1965) __ 22.1 (1997) __ 19.5 (1989) __ 19.2 (1954)

09 ___ 22.8 (1936) __ 37.2 (2004) __ 18.9 (2002) __ 19.2 (1987) __ 13.7 (1934) __ 17.1 (1965)

10 ___ 50.0*(1968)__ 17.7 (1986) __ 18.0 (1957) __ 24.2 (1933) __ 13.0 (1992) __ 10.3 (2016)

11 ___ 11.7 (2017) __ 15.2 (1948)#_ 17.0 (1968) __ 12.0 (2012) __ 15.3 (1940) __ 10.2 (2014)

12 ___ 15.0 (1961) __ 14.3 (2006) __ 23.9 (1948) __ 20.2 (1993) __ 15.6 (1972) __ 18.1 (1993)

13 ___ 19.4 (1932) __ 16.1 (1979)@_ 13.1 (1986) __ 19.3 (2014) __ 26.0 (1993) __ 21.1 (1989)

14 ___ 16.6 (1945) __ 26.0 (1980) __ 42.2 (1994) __ 15.7 (2017)+__17.1 (1946) __ 17.0 (1989)

15 ___ 29.6 (1937) __ 10.3 (1950) __ 24.6 (1968) __ 33.3 (2002) __ 11.7 (1975) __ 10.1 (2018.)

16 ___ 12.8^(1973) __ 10.9 (2019) __ 17.7 (1989) __ 29.3 (1967) __ 17.8 (1969) ___ 8.6 (1989)

17 ___ 30.7 (2001) __ 16.3 (1963) __ 12.2 (1983) __ 19.4 (1939) __ 14.9 (1960) ___ 8.4 (1994)

18 ___ 14.7 (1946) __ 13.6 (1977) __ 12.8 (1973) __ 16.7 (1949) __ 22.8 (1939) __ 18.4 (1989)

19 ___ 10.5 (1939) __ 29.1 (1970) __ 17.6 (2000) __ 19.7 (1981) __ 17.6 (1946) __ 16.2 (1996)

20 ___ 28.0 (2007) __ 13.5 (1932)$__ 31.6 (1946) __ 16.0 (1987) __ 18.6 (1971) __ 17.5 (2003)

21 ___ 14.1 (1988) __ 18.6 (1966) __ 17.4 (1983) __ 11.3 (2001) __ 23.3 (1940) __ 22.3 (2002)

22 ___ 12.6 (2013) __ 15.3 (2010) __ 25.8 (1992) __ 13.1 (2006) __ 13.9 (2006) __ 12.3 (2012)

23 ____ 9.1 (1969) __ 24.5 (1941) __ 19.4 (2012) __ 18.7 (1949) __ 17.0 (1984) __ 12.8 (2013)

24 ___ 18.1 (2015) __ 14.8 (1944) __ 29.1 (1935) __ 13.0 (1998) __ 23.6 (2012) ___ 9.8 (2000)

25 ___ 13.2 (1931) __ 37.7 (1986) __ 18.5 (2000) __ 16.4 (1979) __ 11.3 (1938) __ 10.2 (1998)

26 ___ 19.1 (1941) __ 15.0 (2011) ___ 9.6 (1991) __ 13.8 (1959) __ 25.6 (1983) __ 18.1 (2014)

27 ___ 19.4 (2019) __ 10.4 (2016) __ 14.7 (1988) __ 18.1 (1998) __ 11.5 (1971) __ 22.0 (1979)

28 ___ 31.1 (1969) __ 15.3 (1934) __ 30.5 (1991) __ 10.3 (1968) __ 12.8 (1965) __ 12.5 (1978)++

29 ___ 18.0 (2009) __ 21.0 (1966) __ 12.6 (1990) __ 24.0 (2000) __ 18.6 (1988) __ 21.0 (2002)

30 ___ 39.2 (2002) __ 24.0 (1976) __ 18.8 (2019) __ 14.5 (2003) ___ 9.2 (1992) __ 23.1 (1948)

31 ___ 16.4 (1972) __ 23.5 (1994) __ (( no data )) __ 20.4 (1940) __ (( no data )) __ 15.9 (1976)

# 11 Aug tied in 2008 ... @ 13 Aug tied in 1982 ... $ 20 Aug tied in 2004 ...

Monthly max (second row shows max for period with daily data)

_____ 159.7 (1875) _ 174.1 (1912) _ 126.1 (1883) _ 144.5 (1882) _ 143.4 (1940) _ 137.4 (1914)

_ _ _ 127.9 (1936) _ 146.7 (2004) _ 117.3 (1968) _ 126.0 (1960) _ (same as ^) __ 128.6 (1978)

The wettest calendar year was 1882 (884.6 mm) and since 1931, it was 2012 (876.3 mm).

* This date has several very heavy rainfalls, also 27.9 mm in 1940, 17.7 mm in 1960, 14.9 mm in 2000.

^ This 1973 record followed a heavier rainfall (23.9 mm) that was not a record for the previous day.

+ In 1987, 14th was a record (11.1) until broken in 2017, and that was followed by 18.6 mm on 15 Oct which was broken in 2002, later came the celebrated windstorm overnight which remains a record-breaker.

++ This 1978 record was preceded by 16.5 mm but that was broken the next year.

Note: 19.4 mm on 21 Nov 2016 would have been a daily record on any other day 19-23 Nov but was not a record on 21 Nov. ... table is now edited to 31 July 2019. The new record on 27 July of 2019 replaced 14.6 from 1958. The new record on 16 August 2019 replaced 10.6 from 2008, 2017 ... 15.3 mm on 14th August 2019 was not a new record. ... 30 Sep 2019 replaced 14.5 mm in 1952. A fall of 19.2 on the 28th did not break that day's record of 30.5 mm.

The next entry will be longest dry spells.

Edited October 6, 2019 by Roger J Smith

Roger J Smith · February 4, 2016

Minimum Precipitation over previous ten days

For each date, the lowest cumulative precipitation (mm) in the ten days ending on that date is shown. For example, the lowest value for 10 January is 0.3 mm in 1964, so that would be the total precip for 1-10 Jan of that year. The values for 1-9 January include days from the previous December.

Date __ JAN __FEB__MAR __ APR__ MAY __ JUN__JUL __AUG__SEP __OCT__NOV __DEC

01 ____0.1 ___0.9 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1

__ 1993 _1998_1943_1946_1944,84__1977,97__1941,49,75,76,95__1948,55._1972_1986_1971_1994

02 ____0.1 ___0.8 ___0.0 ___0.2 ___0.0 ___0.0 ___0.0 ___0.2 ___0.0 ___0.0 ___0.0 ___0.2

___ 1993_1959_1943_1946_1942,84_1960,77,97__1941,49,75,76_1935_1947,72,91_1986_1971_1957

03 ____0.7 ___0.7 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1

__ 2009 _2007 _1943 _1974 _1942,2011_1939,60,77,97__1949,75,76_1975 _1947,91_1972,86_1971_1957

04 ____1.7 ___0.7 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.2 ___0.0 ___0.0 ___0.0 ___0.1

__ 1970_1959,2007__1943,68_1974_1942,2011_1939,60,97_1943_1935_1947,91_1972_1971_1962

05 ____1.8 ___0.7 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.0

___ 1973 _1959,2007_1943_1974_1942,95,2011_1939_1979,93_1995_1991_1959_1978_1962

06 ____2.1 ___0.2 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.0

____ 1973_ 2006_ 1943 _1974 _1942,95__1939,51 _1979,93_ 1995_ 1991 _ 1959_ 1988_ 1962

07 ____1.5 ___0.7 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.2 ___0.2

____ 1946 _1959_ 1943_ 1974_ 1942_1939,51_ 1993_ 1995_ 1991_1945,59_1988_ 1962

08 ____1.5 ___0.7 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.1

____ 1946_1959_1943_ 1974_1942_1939,51,62_ 1934_1995_1991 _1945,59_1978_1991

09 ____0.7 ___0.5 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.1

___ 1964_ 1959_ 1943_ 1974_1942_1939,2013_ 1934_1995_ 1991_1945,59_1978,81_ 1991

10 ____0.3 ___0.5 ___0.0 ___0.0 ___0.2 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.2 ___0.0

____ 1964_ 1959_ 1943_ 1974_ 1935_ 2013_ 1934_ 1995_ 1991_ 1953_ 1978_ 1991

11 ___ 0.5 ___0.5 ___0.0 ___0.1 ___0.0 ___0.1 ___0.1 ___0.0 ___0.0 ___0.0 ___0.2 ___0.0

___ 1964_1959,67_ 1943_ 1971 _1935,53_ 2013_ 1934_ 1995_ 1991_ 1953_ 1978_ 1991

12 ____0.8 ___0.3 ___0.0 ___0.1 ___0.0 ___0.2 ___0.0 ___0.1 ___0.0 ___0.3 ___1.5 ___0.0

___ 1966_1959_ 1943 _1971,2007_ 1953_ 1950_2013_ 1995_ 1991_1947,62_1981_1991

13 ____1.0 ___0.2 ___0.0 ___0.1 ___0.3 ___0.0 ___0.3 ___0.0 ___0.0 ___0.0 ___1.2 ___0.0

____ 1950_1934_1943_1971,97_ 1980_1969_2013_1976,83,98_1991,2007_1965_1981_1991

14 ____0.9 ___0.0 ___0.1 ___0.0 ___0.1 ___0.0 ___0.3 ___0.0 ___0.0 ___0.1 ___1.2 ___0.0

___ 1966_ 1934_1938,43_1938_ 2008_ 1975_ 2013_1976,83_1973,2007_ 1962_1981_1991

15 ____0.4 ___0.0 ___0.1 ___0.0 ___0.3 ___0.1 ___0.3 ___0.0 ___0.0 ___0.1 ___2.3 ___0.5

____ 1950 _1934 _1938,43_ 1938_1980_1973_ 2013_1976,83_2007_ 1962_1983_1971,2004

16 ____0.9 ___0.1 ___0.1 ___0.0 ___0.3 ___0.4 ___0.3 ___0.0 ___0.0 ___0.1 ___3.2 ___0.5

__1950,2012 _ 1934_1943_ 1938_1980_ 1973_ 2013 _1976_1982 _ 1962_1983_ 1971

17 ____0.8 ___0.0 ___0.1 ___0.1 ___0.0 ___0.4 ___0.3 ___0.0 ___0.0 ___0.1 ___2.0 ___0.5

____ 2001_1984_1943_ 2010_1980_1973_ 2013_1947,76_1982_ 1962,2003_1983_1971

18 ____1.1 ___0.0 ___0.1 ___0.1 ___0.0 ___0.1 ___0.2 ___0.0 ___0.3 ___0.1 ___1.9 ___1.4

___ 2001_ 1984_1938,43_1947,80_ 1980_ 1967_ 1979_1947,76_ 1982_1962,2003_ 1983_ 1970

19 ____1.0 ___0.0 ___0.1 ___0.0 ___0.4 ___0.0 ___0.1 ___0.0 ___0.3 ___0.0 ___1.9 ___1.1

_____ 2001_ 1984_1938_ 1982_ 2004_1989_ 1972_1947,76_2002_ 2003_ 1983_ 1931

20 ____1.1 ___0.2 ___0.1 ___0.0 ___0.2 ___0.0 ___0.0 ___0.0 ___0.2 ___0.0 ___1.2 ___0.7

__ 1992,2001_1934_1938 _1955,82_1943_ 1989_ 1989 _1947,76_1971_ 1962_ 1955_ 2007

21 ____1.1 ___0.2 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.2 ___0.0___ 1.3___ 0.6

___1992,96 _1934_1938 _1955,82,2011_1943_1996_1989,96_1947,49,76_1971_1962_1955_2007

22 ____0.4 ___0.0 ___0.0 ___0.0 ___0.3 ___0.0 ___0.1 ___0.0 ___0.3 ___0.0 ___1.3 ___1.1

____ 1992_ 1961_ 1998_ 1974_ 1992_1996_ 1996_1947,49,76_1971_ 1962_1955,58_1939

23 ____0.4 ___0.2 ___0.1 ___0.1 ___0.5 ___0.0 ___0.5 ___0.0 ___0.0 ___0.0 ___0.8 ___0.1

___ 1992 _1934,83_ 1938 _1974,82_ 2020 _ 1996_ 1989_ 1976_ 1978_ 1962_ 1961_ 1961

24 ___ 0.4 ___0.2 ___0.2 ___0.0 ___0.1 ___0.0 ___0.4 ___0.0 ___0.4 ___0.1 ___0.6 ___0.1

____ 1992_ 1983_ 1953_ 1976_1961_1949,96_ 1944_ 1976_ 1941_ 1985_ 1973_ 1961

25 ____1.4 ___0.1 ___0.2 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.0 ___0.6 ___0.5

__ 1987_ 1943_1953,2001_ 1951,76_ 1978_1949,96_ 1990_ 1976_ 1966_ 1985_ 1973_ 1961

26 ____0.7 ___0.0 ___0.5 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.1 ___0.0 ___0.6 ___0.8

__ 1932_ 1943_ 2003 _1951,76__1977,78.90_1949_ 1990_1947,76_1966_ 1985_1973_ 1961

27 ____0.4 ___0.0 ___0.5 ___0.1 ___0.0 ___0.0 ___0.2 ___0.1 ___0.0 ___0.0 ___0.6 ___0.8

___ 1933_1943_2003 _1954,76,82,84__1977,78,90__1949,95_1982_1947_1966,86_1985_1973_1961

28 ____0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___1.2 ___0.3

___ 1933_ 1943_ 2019_1984_ 1977,78.90__ 1942,49,95_1955_1947_1966,86_ 1985_ 1934,61_1992

29 ____0.1 ___0.6 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___1.3 ___0.3

____ 1991_1952_ 2019_ 1984_1977,78__1949,75,95_ 1955_1947,67,72_1986_ 1985_1989_ 1992

30 ____0.1 ___xxx ___0.2 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.2 ___0.3

____ 1991 _____ 2012,19_1984 _1977,78__1949,75,95_ 1955_1972_1986_ 1985_1994_1992

31 ____0.5 ___xxx ___0.2 ___xxx ___0.0 ___xxx ___0.0 ___0.0 ___xxx ___0.0 ___xxx ___0.1

____ 1991_________ 2012,19_____ 1977 ________ 1955 _ 1972 _______ 1971 ______ 1992

_____________________________________

0.5 mm 14-23 May 2020 replaced 0.6 mm from 2010.

0.0 mm 24 May - 2 June (1960,77,97) will have 2020 as fourth tied year if 1-2 June confirmed at 0.0.

Edited June 9, 2020 by Roger J Smith

Roger J Smith · February 4, 2016

Dry months and longest dry spells

Lowest monthly precipitation totals (1872-2020)

JAN __ FEB __ MAR __ APR __ MAY __ JUN __ JUL __ AUG __ SEP __ OCT __ NOV __ DEC ___ YEAR

6.0 ___ 3.4 ___ 3.4 ___ 5.6 ___ 5.4 ___ 5.8 ___ 9.8 ___ 7.8 ___ 3.7 ___ 8.3 __ 14.0 __ 11.6 ___ 408.3

1880 _ 1891 _ 1929 _ 1912 _ 2020 _ 1925 _ 1911 _ 1995 _ 1959 _ 1947 _ 1945 _ 1933 ___ 1921

Dry spells longer than ten days

--- all ending at ten days will appear in the previous post without a consecutive listing, for example the only 10-day dry spell in January which was 19-28 Jan 1933. Ties are listed in chronological order.

Year ___ no. dry days ___ duration ______ associated longer spell with no days above 0.1 mm

1943 ____ 25 _______ 17 Feb - 13 Mar ____ 31 days __ 16 Feb-18 Mar __ 0.1 on 16 Feb, 14 Mar

1949 ____ 19 _______ 16 Jun -- 04 Jul _____ 19 days __ 16 Jun -- 04 Jul (no extension)

1977 ____ 18 _______ 17 May - 03 Jun ____ 19 days __ 16 May - 03 Jun __ 0.1 on 16 May

1939 ____ 16 _______ 25 May - 09 Jun ____ 16 days __ 25 May - 09 Jun (no extensions)

1974 ____ 16 _______ 26 Mar - 10 Apr ____ 17 days __ 25 Mar - 10 Apr __ 0.1 on 25 Mar

1978 ____ 15 _______ 16-30 May _________ 15 days __ 16-30 May (no extensions)

1942 ____ 14 _______ 23 Apr - 06 May ____ 19 days __ 21 Apr - 09 May __ 0.1 on 22 Apr, 7 May

1975 ____ 14 _______ 20 Jun -- 03 Jul _____ 14 days __ 20 Jun -- 03 Jul (no extension)

1984 ____ 14 _______ 19 Apr - 02 May ____ 21 days __ 18 Apr - 08 May __ 0.1 on 18 Apr, 3,6,7 May

1995 ____ 14 _______ 18 Jun -- 01 Jul _____ 15 days __ 17 Jun -- 01 Jul __ 0.1 on 17 Jun

1996 ____ 14 _______ 13-26 Jun __________ 14 days __ 13-26 Jun (no extension)

1997 ____ 13 _______ 23 May -- 04 Jun ___ 13 days __ 23 May -- 04 Jun (no extension)

1951 ____ 12 _______ 28 May - 08 Jun ____ 12 days __ 28 May - 08 Jun (no extension)

1960 ____ 12 _______ 24 May - 04 Jun ____ 12 days __ 24 May - 04 Jun (no extension)

1976 ____ 12 _______ 15-26 Apr __________ 16 days __ 15-30 Apr __ 0.1 on 27 Apr

1976 ____ 12 _______ 21 Jun - 02 Jul ______ 13 days __ 20 Jun - 02 Jul __ 0.1 on 20 Jun

1982 ____ 12 _______ 10-21 Apr __________ 19 days __ 10-28 Apr __ 0.1 on 22 Apr

1984 ____ 12 _______ 08-19 Feb __________ 12 days __ 08-19 Feb __ (no extension)

1990 ____ 12 _______ 17-28 May _________ 13 days __ 16-28 May __ 0.1 on 16 May

1993 ____ 12 _______ 26 Jun - 07 Jul ______ 12 days __ 26 Jun -- 07 Jul __ (no extension)

2011 ____ 12 _______ 24 Apr - 05 May ____ 12 days __ 24 Apr - 05 May __ (no extension)

1934 ____ 11 _______ 05-15 Feb __________ 19 days __ 05-23 Feb __ 2 days at 0.1 (16th,18th)

1951 ____ 11 _______ 16-26 Apr __________ 11 days __ 16-26 Apr __ (no extension)

1953 ____ 11 _______ 02-12 May _________ 11 days __ 02-12 May __ (no extension)

1955 ____ 11 _______ 11-21 Apr __________ 12 days __ 10-21 Apr __ 0.1 on 10 Apr

1980 ____ 11 _______ 08-18 May _________ 11 days __ 08-18 May __ (no ext) but 1-6 May 0.0 7th 0.3

1989 ____ 11 _______ 10-20 June _________ 11 days __ 10-20 June __ (no extension)

1995 ____ 11 _______ 26 Apr -- 06 May ___ 11 days __ 26 Apr -- 06 May __ (no extension)

note: table is currently under construction, anything that started in July or later not yet added

Edited June 9, 2020 by Roger J Smith

Roger J Smith · February 4, 2016

For the time being, I have run into editing problems, can't get into the previous post to edit it, so the following data should be merged with the data in the previous post. At some later date I may be able to do this.

YEAR ___ no. dry days __ duration _________ associated longer spell etc

1976 ____ 22 _______ 04-25 Aug _________ 23 days __ 04-26 Aug __ 0.1 26 Aug

1991 ____ 21 _______ 24 Aug - 13 Sep ___ 21 days __ 24 Aug - 13 Sep (no ext)

1986 ____ 16 _______ 18 Sep -- 03 Oct ___ 21 days __ 18 Sep - 08 Oct __ 0.1 on 4 Oct

1995 ____ 16 _______ 27 Jul - 11 Aug _____ 26 days __ 27 Jul - 21 Aug __ 0.1 on 12 Aug

______________________________________________________ (18 July to 26 Aug very dry)

1947 ____ 15 _______ 08-22 Aug _________ 32 days __ 06 Aug - 06 Sep __ 0.1 6,7 Aug

_________________________________________ (and 0.1 23 Aug, then another dry spell*)

1985 ____ 15 _______ 16-30 Oct __________ 22 days __ 09-30 Oct __ 0.1 9th, 15th Oct

1955 ____ 14 _______ 19 Jul -- 01 Aug ____ 14 days __ 19 Jul -- 01 Aug (no extension)

1959 ____ 14 _______ 26 Sep - 09 Oct ____ 15 days __ 25 Sep - 09 Oct __ 0.1 25 Sep

1971 ____ 14 _______ 22 Oct - 04 Nov ____ 14 days __ 22 Oct - 04 Nov __ (no ext)

1991 ____ 14 _______ 01-14 Dec __________ 16 days __ 29 Nov-14 Dec __ 0.1 30th Nov

1962 ____ 13 _______ 11-23 Oct __________ 19 days __ 05-23 Oct __ 0.1 10th Oct

1972 ____ 13 _______ 21 Aug -- 02 Sep ___ 14 days __ 20 Aug - 02 Sep __ 0.1 20 Aug

1934 ____ 12 _______ 29 Jun -- 10 Jul ____ 13 days __ 29 Jun -- 11 Jul __ 0.1 on 11 Jul

1945 ____ 12 _______ 28 Sep - 09 Oct ____ 12 days __ (no extension)

1947* ___ 12 _______ 24 Aug - 04 Sep ___ see earlier, extended with 0.1 5th-6th Sep

1983 ____ 12 _______ 04-15 Aug _________ 12 days __ 04-15 Aug (no extension)

1993 ____ 12 _______ 26 Jun - 07 Jul _____ 12 days __ 26 Jun - 07 Jul (no extension)

2007 ____ 12 _______ 04-15 Sep _________ 12 days __ (no extension)

1949 ____ 11 _______ 12-22 Aug ________ 15 days __ 11-25 Aug __ 0.1 on 11, 23, 25th

1953 ____ 11 _______ 01-11 Oct _________ 11 days __ 01-11 Oct __ (no extension)

1966 ____ 11 _______ 18-28 Sep _________13 days __ 16-28 Sep __ 0.1 on 17 Sep

1972 ____ 11 _______ 25 Sep - 05 Oct ___ 20 days __ 19 Sep-08 Oct_ 0.1 24th, 6th

1979 ____ 11 _______ 26 Jun - 06 Jul _____ 12 days __ 26 Jun - 07 Jul __ 0.1 07 Jul

1982 ____ 11 _______ 07-17 Sep _________ 11 days __ 07-17 Sep (no extension)

1989 ____ 11 _______ 11-21 Jul __________ 11 days __ 11-21 Jul (no ext) 0.5 22nd, 0.0 6d+

1990 ____ 11 _______ 16-26 Jul __________ 11 days __ 16-26 Jul (no extension)

________________________________________________________________________

Notes: of the 54 spells listed above (53 if one considers the two linked in Aug-Sep 1947), the frequency by decades (and half-decade) are as follows:

1931-40 ___xxx (3)

1941-50 ___xxxxxxx (7)

1951-60 ___xxxxxxxx (8)

1961-70 ___xx (2)

1971-80 ___xxxxxxxxxxxx (12)

1981-90 ___xxxxxxxxxxx (11)

1991-2000 _xxxxxxxxx (9)

2001-10 __x (1)

2011-15 __ x (1)

The period from 1971 to 1998 had 32 of the 54 longest dry spells. The 1960s and the 21st century as well as the later 1930s all appear to be wetter periods. As 0.1 mm is a very small amount of rain(more or less a trace amount) the second list could be considered significant for comparisons of length. While mid-winter dry spells are rare, the interval from 22 Dec 1992 to 2 Jan 1993 almost qualified with 0.1 mm on 26th Dec the only measured precip in the 12 day interval.

Roger J Smith · February 6, 2016

Due to editing problems above, I could not merge the two tables of dry spells. These are the top five dry spells from the combined data:

Rank ___ days ____ YEAR _____ duration

1 _______ 25 ______ 1943 ___ 17 February to 13 March

2 _______ 22 ______ 1976 ___ 04 to 25 August

3 _______ 21 ______ 1991 ___ 24 August to 13 September

4 _______ 19 ______ 1949 ___ 16 June to 04 July

5 _______ 17 ______ 1977 ___ 17 May to 03 June

After these, four are tied 6th longest at 16 days, another three are tied 10th longest at 15 days.

The two longest nearly dry spells (no day over 0.1 mm) were 32 days from 6 August to 6 September of 1947 and 31 days from 16 February to 18 March of 1943. In third place was 26 days from 27 July to 21 August 1995.

Meanwhile, this table shows the number of 11+ day dry spells that fell into each month, in some cases one dry spell counts for two months here.

JAN _ 0 _______ MAY _14 ______ SEP _10

FEB _ 3 _______ JUN _16 ______ OCT _ 9

MAR _ 2 _______ JUL _12 ______ NOV _ 1

APR _ 9 _______ AUG _ 9 ______ DEC _ 1

Roger J Smith · June 9, 2016

New records in May 2016 (post now edited successfully) ...

08 ... 17.8 (2016) ... formerly 16.9 (1867)

09 ... 17.6 (2016 ties 1945)

Edited July 11, 2016 by Roger J Smith

Roger J Smith · November 21, 2016

Weather-history pointed out that no December CET has finished on 5.9.

I looked into the records to see how unusual that was compared to other months and their missing values.

There was only one 3.1 January (1832). That is quite odd given that the long-term average until 2016 was 3.2 when it changed to 3.3. Another rather unexpected single is 11.2 in October. In this study it must be remembered that from 1659 to about 1710, almost all the values were multiples of 0.5.

Here is a list of the closest-to-long-term missing values of CET on both the warm and the cold sides of normal. The averages are for 1659 to 2016 except for this month and December which use 1659 to 2015. In a warming climate I suppose you could say there is an increasing chance of filling in the holes on the high side of average, and a decreasing chance of filling in holes on the low side. I have included all missing values out to the extremes. May has filled in every value below average to the extreme of 8.5 so the comparative value is 8.4. July has also filled in every value below average to the extreme of 13.4 so the comparative value is 13.3.

Never recorded monthly CET values (between extremes)

MONTH _____ Low side of average _______________ 1659-present Average _____ High side of average

January _-2.7 to -2.2, -1.9,-1.8,-1.7,-1.3,-1.2,-1.1, -0.5 _________ 3.3 ______ 7.2, 7.4

February _ -1.5 to -1.2, -0.9,-0.8,-0.6 to -0.3, -0.1, 0.2, 0.3, 1.1, 1.3 __ 3.9 ____ 7.4, 7.6, 7.7, 7,8

March ___ 1.1, 1.3, 1.4, 1.5, 1.6, 1.7, 2.2, 2.4, 2.6 _____________ 5.3 ______ 8.0, 8.5, 8.6, 8.7, 8.8, 8.9

April ____________________ 4.8 to 5.1, 5.3, 5.6 ____________ 7.9 _____ 10.7, to 11.1, 11.3 to 11.7

May _________ no values missing therefore 8.4 ___________11.2 _____ 13.2, 14.0 to 15.0

June ___________________________11.6, 11.7 _________ 14.3 __ 16.3, 16.5, 16.7, 17.2, 17.4 to 17.9, 18.1

July _________ no values missing therefore 13.3 ________ 16.0 ____ 18.9 to 19.4, 19.6

August ____________________ 13.1, 13.2, 13.4 _______ 15.6 __ 17.7, 17.9, 18.4, 18.5, 18,8, 18,9, 19.1

September _____________________ 10.8, 10.9 _______13.3 __ 15.5, 15.8, 15.9, 16.1, 16.2, 16.4, 16.5, 16.7

October __________5.4 to 6,3, 6.6, 6.7, 6.8, 7.7 _______ 9.7 ____ 12.1, 12.2, 12.4, 13.2

November __________________ 2.4 to 2.7, 3.8 _______ 6.1 _____ 8.3, 8.8, 9.0, 9.7 to 10.0

December ___ -0.6, -0.4, -0.1, 0.0, 0.1, 0.2. 0.8, 0.9 ____ 4.1 ____ 5.9. 7.0, 7.1, 7.8 to 8.0, 8.2 to 9.6

____________________________________________________________________

These can best be compared by ranks. I have blended these but the cold side rankings are in italics so you can more easily compare the high and low side ... if second missing value is not top five, I mention its rank as well. A month would add one rank in this table each time that the second highest or lowest value was snatched away including consecutive values to the extreme as for example if December hit 0.8 and not 0.9. If this December were colder that would add one rank to the value waiting to be hit or if any more extreme value already established is tied..

The most extreme is the 5.9 for December, if it occurred this year, it would be the 54th warmest December. If that 11.2 had not happened in Oct 1706, it would be a missing 40th warmest. But if the 3.1 had not happened in Jan 1832, it would be a missing 149th coldest.

If February was 1.3, that would be 31st coldest. 1.1 would be 28th coldest. 0.3 or 0,2 would rank 11th.

... The next October to hit 7.7 will be 27th coldest. However, it has not been that cold since 7.8 in 1992 (colder 1919).

If November hits 8.3 next year (because it likely won't this year) it would be 20th warmest. (8.8 10th warmest).

... Also, the next November to hit 3.8 (assuming nothing colder in between) will be 20th coldest.

... If December hits 0.9 or 0.8, that would be 17th coldest (0.8 would then make 0.9 18th coldest).

... Also the next January to hit --0.5 will be 17th coldest. Anything -1.3 to -1.1 would be 12th coldest (then -0.5 18th).

... The next April to hit 5.6 (assuming nothing colder in between) would be 16th coldest, 5.3 would be fifth coldest.

If next June hits 16.3, that would be 15th warmest. (16.5 10th warmest) and if Oct hits 12.1 or 12.2, 15th warmest. 12.4 would be 13th warmest.

If next May hits 13.2, that would be 12th warmest. Also if August hits 17.7, that would be 12th warmest

... If next March hits 2.6 that would be 12th coldest.

If next March hits 8.0, that would be 10th warmest. Also if September hits 15.5 that would be 10th warmest.

... The next September to hit 10.9 or 10.8 would be 7th coldest (10.8 would move 10.9 to 8th coldest). (little optimism for this)

... The next August to hit 13.4 would be 5th coldest (might take a glacial episode for this one).

If January hit 7.2 that would be 4th warmest, and if February hit 7.4, 3rd warmest. Also if April hits 10.7-11.1, 3rd warmest.

If July hits 18.9 to 19.4, that would be 3rd warmest.

... If any June ever manages 11.7 or 11.6, that would be 2nd coldest, 11.6 would move 11.7 to 3rd coldest.

If May or July hit the first unrecorded low value, that would be a new record (coldest).

Summary of first missing value ranks

Month _________ Below avg __ Above avg

JAN __________ --0.5 (17) ___ 7.2 (4)

FEB ___________ 1.3 (31) ___ 7.4 (3)

MAR ___________ 2.6 (12) ___ 8.0 (10)

APR ____________5.6 (16) __ 10.7 (3)

MAY ____________8.4 (1) __ 13.2 (12)

JUN ___________ 11.7 (2) __ 16.3 (15)

JUL ____________13.3 (1) __ 18.9 (3)

AUG ___________ 13.4 (5) __ 17.7 (12)

SEP ___________ 10.9 (7) __ 15.5 (10)

OCT ____________7.7 (12) __12.1 (15)

NOV ___________ 3.8 (20) ___ 8.3 (20)

DEC ___________ 0.9 (17) ___ 5.9 (54)

From this it can be seen that December, followed by November have the most unusual missing values July is least remarkable. This is probably related to the larger spread in winter compared to summer.

Roger J Smith · April 24, 2017

Warmest and coldest weeks (1772 to present)

The table lists the highest and lowest average values for seven consecutive days ending with the date where they appear in the table. For example, the warmest 1 to 7 January was 9.17 in 1916. Values for the first six days of January will start in the previous year on the defined date in December. For example, the record minimum for 26 Dec to 1 Jan begins 26 Dec 1798 and ends 1 Jan 1799 as shown. Periods that include a leap year day are marked with an asterisk, there are values for non-leap year intervals ending on same dates below the table. Of course for a week to end on 29 Feb it has to be in a leap year. This table is constructed without reference to the calendar, in other words, these "weeks" could start and end on any combination of days of the week. Ties occur only In two decimal format, e.g. minimum 2 to 8 Jan in 1864 and 1894, and extremes from 1940 to present are shown in a second grouping (where they are not set in the absolute record section, if they were, the second highest or lowest values regardless of period will appear in italic. (note: because there are no daily values for Dec 1786, no interval including any days from that month can appear, however from Nov 1786 and Jan 1787 data there were no possible intervals that included those months and parts of Dec 1786 -- note that the record minimum ending 4 or 5 Jan 1786 is not affected by this as some data comes from Dec 1785).

JANUARY

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Jan _______ 9.23 __ 2016 _____ --3.86 __ 1799 ____ 9.18 (1921), --2.30 (1963)

02 Jan _______ 9.17 __ 1921 _____ --3.69 __ 1893 ____ 8.61 (2016), --2.44 (1962)

03 Jan _______ 9.03 __ 1921 _____ --3.44 __ 1893 ____ 8.17 (1975), --2.59 (1962)

04 Jan _______ 9.21 __ 1921 _____ --4.21 __ 1786 ____ 8.14 (2007), --2.07 (1962)

05 Jan _______ 8.93 __ 1921 _____ --3.99 __ 1786 ____ 8.16 (1992), --2.67 (1979)

06 Jan _______ 8.73 __ 1921 _____ --4.10 __ 1795 ____ 8.64 (1992), --2.91 (1979)

07 Jan _______ 9.17 __ 1916 _____ --3.91 __ 1795 ____ 8.83 (1992), --2.17 (1979)

08 Jan _______ 8.96 __ 1992 _____ --3.73 _ 1864,94 ___ 8.49 (1916), --2.17 (2010)

09 Jan _______ 8.47 __ 1957 _____ --3.96 __ 1841 ____ 8.36 (2007), --2.51 (2010)

10 Jan _______ 8.46 __ 2007 _____ --3.76 __ 1841 ____ 8.41 (1873), --2.60 (2010)

11 Jan _______ 8.56 __ 1976 _____ --3.51 __ 1814 ____ 8.54 (1873), --2.01 (2010)

12 Jan _______ 9.14 __ 1976 _____ --4.17 __ 1814 ____ 8.53 (1873), --3.17 (1982)

13 Jan _______ 9.16 __ 1976 _____ --4.61 __ 1814 ____ 8.91 (2007), --4.03 (1982)

14 Jan _______ 9.09 __ 1976 _____ --4.97 __ 1814 ____ 8.89 (1873), --4.74 (1982)

15 Jan _______ 8.77 __ 1873 _____ --5.61 __ 1838 ____ 8.76 (1976), --4.89 (1982)

16 Jan _______ 8.46 __ 1976 _____ --5.46 __ 1838 ____ 8.39 (1796), --4.40 (1982)

17 Jan _______ 8.63 __ 1796 _____ --5.19 __ 1838 ____ 8.36 (2007), --3.84 (1987)

18 Jan _______ 8.84 __ 1796 _____ --5.63 __ 1881 ____ 8.39 (2007), --3.47 (1987)

19 Jan _______ 8.93 __ 1796 _____ --5.74 __ 1881 ____ 8.51 (2007), --2.90 (1940)

20 Jan _______ 8.77 __ 1932 _____ --6.30*__ 1881 ____ 8.27 (2007), --3.53 (1940)

21 Jan _______ 8.90^__ 1796 _____ --6.44 __ 1881 ____ 8.41 (2008), --4.27 (1940)

22 Jan _______ 8.84*__ 1796 _____ --6.33 __ 1881 ____ 8.03 (2008), --4.70 (1940)

23 Jan _______ 9.01 __ 1828 _____ --5.67 __ 1881 ____ 8.27 (2008), --4.79 (1940)#

24 Jan _______ 9.13 __ 1828 _____ --5.64 __ 1881 ____ 8.70 (2008), --4.87 (1963)

25 Jan _______ 8.94 __ 1846 _____ --6.00 __ 1795 ____ 8.29 (2008)@ --5.19 (1963)

26 Jan _______ 9.11 __ 1918 _____ --6.10 __ 1881 ____ 8.71 (1969), --5.04 (1963)

27 Jan _______ 9.36 __ 1834 _____ --5.36 __ 1881 ____ 9.14 (1969), --4.56 (1963)

28 Jan _______ 9.29 __ 1834 _____ --4.29 __ 1945 ____ 8.84 (2016), --3.81 (1963)

29 Jan _______ 9.00 __ 2016 _____ --4.46 __ 1945 ____ 8.73 (1846), --3.76 (1776)

30 Jan _______ 8.84 __ 1921 _____ --4.54 __ 1776 ____ 8.64 (2016), --4.03 (1945)

31 Jan _______ 8.93 __ 1846 _____ --5.54 __ 1776 ____ 8.36 (2002), --2.70 (1947)

notables:

* week of 14-20 Jan 1838 averaged --6.16.

^ week of 15-21 Jan 1932 averaged 8.89, 16-22 Jan 1932 was 8.79

# week of 17-23 Jan 1963 averaged --4.34

@ week of 19-25 Jan 1969 averaged 8.27

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

FEBRUARY

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Feb _______ 8.77 __ 2002 _____ --6.24 __ 1776 ____ 8.67 (1843), --2.81 (1947)

02 Feb _______ 9.34 __ 1923 _____ --5.47 __ 1776 ____ 9.31 (2002), --3.03 (1954)

03 Feb _______ 9.64 __ 1923 _____ --4.14 __ 1776 ____ 9.31 (1967), --3.19 (1954)

04 Feb _______ 9.53*__ 1923 _____ --3.34 __ 1830 ____ 9.00 (2002), --3.06 (1954)

05 Feb _______ 9.81 __ 2004 _____ --4.29 __ 1830 ____ 9.24 (1862), --3.07 (1954)

06 Feb ______ 10.37 __ 2004 _____ --5.09 __ 1830 ____ 9.16 (1869), --3.16 (1954)

07 Feb ______ 10.26 __ 2004 _____ --3.73 __ 1830 ____ 9.31 (1869), --2.83 (1954)

08 Feb _______ 9.64 __ 2004 _____ --3.86 __ 1895 ____ 9.51 (1869), --1.91 (1954)

09 Feb _______ 9.81 __ 1869 _____ --4.97 __ 1895 ____ 8.27 (2004), --2.36 (1991)

10 Feb _______ 9.83 __ 1869 _____ --5.71 __ 1895 ____ 8.43 (1990), --2.63 (1991)

11 Feb _______ 9.49^__ 1869 _____ --6.23 __ 1895 ____ 8.20 (2011), --2.53 (1991)

12 Feb _______ 9.34 __ 1903 _____ --6.29 __ 1895 ____ 8.50 (2002), --2.70 (1991)

13 Feb _______ 9.09 __ 1918 _____ --5.97 __ 1895 ____ 8.90 (1998), --2.50 (1991)

14 Feb _______ 9.53 __ 1998 _____ --5.71 __ 1895 ____ 9.16 (1899), --2.54 (1985)

15 Feb ______ 10.03 __ 1998 _____ --5.10 __ 1895 ____ 8.87 (1899), --3.16 (1985)

16 Feb ______ 10.37 __ 1998 _____ --4.46 __ 1855 ____ 8.67 (1961), --3.26 (1985)

17 Feb ______ 10.16 __ 1998 _____ --5.24#__ 1929 ____ 8.46 (1779), --2.87 (1985)

18 Feb _______ 9.61 __ 1998 _____ --5.56#__ 1929 ____ 8.64 (1779), --2.61 (1985)

19 Feb _______ 9.07 __ 1998 _____ --5.09#__ 1929 ____ 8.83 (1779), --2.36 (1985)

20 Feb _______ 8.86 __ 1998 _____ --4.96 __ 1855 ____ 8.54 (1779), --2.21 (1947)

21 Feb _______ 8.70 __ 1998 _____ --4.49 __ 1855 ____ 8.57 (2017), --2.41 (1947)

22 Feb _______ 9.01 __ 2017 _____ --4.33 __ 1855 ____ 8.43 (1876), --2.63 (1947)

23 Feb _______ 9.04 __ 2017 _____ --3.34 __ 1855 ____ 8.89 (1990), --2.69 (1947)

24 Feb _______ 9.53 __ 1990 _____ --3.20 __ 1947 ____ 8.67 (1953), --2.17 (1956)

25 Feb _______ 9.67 __ 1990 _____ --3.51 __ 1947 ____ 9.21 (1926), --2.30 (1956)

26 Feb _______ 9.63 __ 1846 _____ --3.50 __ 1947 ____ 9.49 (1990), --2.43 (1986)

27 Feb ______ 10.07 __ 1846 _____ --3.13 __ 1947 ____ 8.89 (1953), --2.29 (1986)

28 Feb ______ 10.39 __ 1846 _____ --2.70 __ 1947 ____ 8.80 (2012), --1.63 (1986)

29 Feb**______ 8.86 __ 2012 _____ --0.50 __ 1888 ____ 8.64 (1912), +1.36 (1968)

** This data can only include leap years

NOTABLES:

* week of 29 Jan to 4 Feb 1862 averaged 9.34

^ week of 5 to 11 Feb 1903 averaged 9.36

# week of 11 to 17 Feb 1855 averaged --5.03, 12 to 18 Feb --5.16, 13 to 19 Feb --5.03.

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

March and April data to be posted next, probably tomorrow (25 April)

Roger J Smith · April 25, 2017

(tables continued, see explanation above JANUARY)

MARCH

Weeks ending 01 to 06 March may or may not include Leap Year day (29 Feb). The table shows the extremes for all years and then the extreme cases that include leap year day (these of course have to be in a leap year -- note that 1800 and 1900 were not leap years). In one case the overall record was in a leap year. An asterisk note shows the extreme that wasn't in a leap year. From 07 March on, the week starts later than 28 or 29 Feb and so we revert to the one entry.

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Mar ______ 10.53 __ 1846 _____ --2.59 __ 1947 ____ 8.84 (1959), --1.29 (1986)

_ (leap yr only) _8.86 __ 1828 _____ --0.40 __ 1888 ____ 8.33 (2012), 1.07 (1968)

02 Mar ______ 10.29 __ 1846 _____ --2.24 __ 1947 ____ 9.40 (1959), --0.91 (1986)

_ (leap yr only) _9.04 __ 1912 _____ --0.17 __ 1888 ____ 8.81 (1960), 1.06 (2004)

03 Mar ______ 10.16 __ 1846 _____ --1.64 __ 1947 ____ 9.50 (1959,60), --0.86 (1929)

_ (leap yr only) _9.50 __ 1960 _______0.30 __ 1904 ____ 9.13 (1912), 1.39 (2004)

04 Mar _______ 9.83 __ 1846 _____ --1.11 __ 1947 ____ 9.44*(1960), --0.77 (1786)

_ (leap yr only) _9.44 __ 1960 _______0.36 __ 1904 ____ *9.33 (1959), 1.3 (1944)

05 Mar ______ 10.06 __ 1834 _____ --1.19 __ 1786 ____ 9.23 (1959), --1.01 (1947)

_ (leap yr only) _ 9.19 __ 1960 _______0.44 __ 1796 ____ 9.17 (1872), 1.5 (1944)

06 Mar _______ 9.74 __ 1834 _____ --1.61 __ 1786 ____ 8.91 (1959), --1.20 (1947)

_ (leap yr only) _ 9.37 __ 1872 ______ 0.19 __ 1796 ____ 8.34 (1960), 1.80 (1944)

07 Mar _______ 9.67 __ 1834 ____ --1.70__1786,1947 __8.41 (1959), --0.97 (1965)

08 Mar _______ 9.74 __ 1834 _____ --1.99 __ 1786 ____ 8.87 (1952), --1.60 (1947)

09 Mar _______ 9.74 __ 1834 _____ --2.11 __ 1786 ____ 9.11 (1952), --1.16 (1947)

10 Mar _______ 9.73 __ 1834 _____ --2.03 __ 1786 ____ 9.00 (2000), --0.69 (1947)

11 Mar _______ 9.86 __ 2000 _____ --1.27 __ 1786 ____ 9.50 (1957), --0.31 (1947)

12 Mar ______ 10.69 __ 1957 _____ --0.34 __ 1886 ___ 10.13 (2000), +0.09 (1947)

13 Mar ______ 11.23 __ 1957 _____ --0.60 __ 1785 ___ 10.33 (2000), +0.05 (1958)

14 Mar ______ 11.17 __ 1957 _____ --0.83^__ 1785 ___ 10.47 (1948), +0.46 (1958)

15 Mar ______ 11.34 __ 1957 _____ --1.00 __ 1845 ___ 10.21 (1948), +0.71 (1958)

16 Mar ______ 11.40 __ 1957 _____ --1.76 __ 1845 ___ 10.24 (1961), +0.16 (1958)

17 Mar ______ 11.41 __ 1957 _____ --2.49 __ 1845 ___ 10.44 (1961), +2.06 (1962)

18 Mar ______ 10.91 __ 1957 _____ --2.41 __ 1845 ___ 10.47 (1828), +1.44 (1962)

19 Mar ______ 10.89 __ 1884 _____ --2.19 __ 1845 ___ 10.43 (1957), +1.41 (1962)

20 Mar ______ 10.86 __ 1884 _____ --1.49 __ 1845 ___ 10.46 (1990), +1.67 (1962)

21 Mar ______ 10.87 __ 2005 _____ --0.59 __ 1845 ___ 10.86 (1990), +1.49 (1985)

22 Mar ______ 11.40 __ 2005 ______+0.53 __ 1845 ___ 10.80 (1990), +1.49 (1985)

23 Mar ______ 11.41 __ 2005 ______+0.34 __ 1853 ___ 10.51 (1990), +1.21 (1958)

24 Mar ______ 11.31 __ 2005 ______+0.03 __ 1837 ___ 10.19 (1927), +1.26 (1958)

25 Mar ______ 11.24 __ 2005 _______0.00 __ 1837 ___ 10.31 (1886), +1.51 (1958)

26 Mar ______ 11.00 __ 2005 ______+0.01 __ 1837 ___ 10.79 (1886), +1.24 (2013)

27 Mar ______ 10.94 __ 1886 ______+0.31 __ 1837 ___ 10.67 (2012), +1.03 (2013)

28 Mar ______ 10.93 __ 2012 ______+0.73 __ 1785 ___ 10.81 (1886), +0.94 (2013)

29 Mar ______ 10.99 __ 2012 ______+0.63 __ 1785 ___ 10.63 (1886), +0.77 (2013)

30 Mar ______ 10.73 __ 2012 ______+0.64 __ 1785 ___ 10.37 (1803), +0.94 (2013)

31 Mar ______ 10.71 __ 1998 ______+0.71 __ 1785 ___ 10.66#(1803), +1.07 (2013)

NOTABLES:

* 1959 was the warmest non leap year ending on 4 March, for leap year only the correct entry is 9.44 (1960).

^ week of 8 to 14 March 1845 --0.71

# nearly as warm, 25-31 March, 10.60 in 2006 and 10.49 in 2017.

(despite three very warm days, 1777 was not able to exceed 10 deg for any consecutive seven days). There was an average of 9.8 between 18th and 27th of March. Problem for setting this kind of record, three cool days between two warm spells.

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

APRIL

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Apr ______ 10.90 __ 1998*______ 0.91 __ 1785 ____10.77 (1803), 1.24 (2013)

02 Apr ______ 10.96 __ 2017*______ 0.86 __ 1785 ____10.91 (1938), 1.49 (2013)

03 Apr ______ 11.39 __ 1946 ______ 0.71^__ 1785^____11.13*(2017), 1.74 (2013)

04 Apr ______ 12.39 __ 1946 ______ 0.77 __ 1799 ____11.76 (1848), 1.96 (2013)

05 Apr ______ 12.13 __ 1848 ______ 1.16#__1799#____12.06 (1946), 2.39 (2013)

06 Apr ______ 12.04 __ 1999 ______ 1.49 __ 1917 ____ 11.73 (1926), 2.70 (2013)

07 Apr ______ 12.60 __ 1926 ______ 1.73 __ 1917 ____ 11.64 (2011), 3.04 (2013)

08 Apr ______ 12.44 __ 1926 ______ 1.80 __ 1839 ____ 11.46 (2011), 3.00 (1968)

09 Apr ______ 11.80 __ 1926 ______ 1.79 __ 1839 ____ 11.39 (2011), 3.44 (1975)

10 Apr ______ 11.80 __ 2011 ______ 2.31 __ 1839 ____ 11.53 (1999), 3.54 (1975)

11 Apr ______ 12.23 __ 2011 ______ 2.26 __ 1837 ____ 11.63 (1798), 3.61 (1986)

12 Apr ______ 11.79 _ 1778,2011 ___2.16 __ 1837 ____ 11.63 (1798), 3.73 (1986)

13 Apr ______ 12.16 __ 1778 ______ 2.01 __ 1837 ____ 10.97 (1981), 3.80 (1986)

14 Apr ______ 12.81 __ 1869 ______ 2.00 __ 1837 ____ 11.36 (1981), 3.87 (1978)

15 Apr ______ 12.84 __ 1869 ______ 2.31 __ 1837 ____ 12.01 (2007), 3.64 (1978)

16 Apr ______ 13.31 __ 1945 ______ 2.39 __ 1837 ____ 12.93 (1869), 3.56 (1978)

17 Apr ______ 13.97 __ 1945 ______ 2.99 __ 1837 ____ 13.46 (1949), 3.24 (1966)

18 Apr ______ 14.17 __ 1945 ______ 2.40 __ 1892 ____ 13.80 (1949), 3.04 (1966)

19 Apr ______ 14.37 __ 1945 ______ 2.34 __ 1892 ____ 13.46 (1949), 3.01 (1966)

20 Apr ______ 14.79 __ 1945 ______ 3.06 __ 1892 ____ 12.97 (2003), 3.27 (1966)

21 Apr ______ 14.57 __ 1945 ______ 3.49 __ 1849 ____ 12.61 (2003), 4.17 (1966)

22 Apr ______ 13.40 __ 1945 ______ 3.33@__1838 ____ 12.96 (2011), 5.43 (1991)

23 Apr ______ 13.63 __ 2011 ______ 3.64 __ 1849 ____ 13.33 (1893), 5.27 (1991)

24 Apr ______ 14.27 __ 1893 ______ 3.80 __ 1908 ____ 13.99 (2011), 5.30 (1981)

25 Apr ______ 14.70 __ 1893 ______ 3.30 __ 1908 ____ 14.17 (2011), 4.90 (1981)

26 Apr ______ 14.41 __ 1893 ______ 3.31 __ 1908 ____ 13.73 (2011), 4.50 (1981)

27 Apr ______ 14.04 __ 1874 ______ 3.50 __ 1908 ____ 13.40 (2011), 4.39 (1981)

28 Apr ______ 14.23 __ 1840 ______ 3.86 __ 1908 ____ 13.23 (1987), 4.44 (1981)

29 Apr ______ 14.29 __ 1840 ______ 4.23 __ 1857 ____ 13.76 (1987), 4.99 (1981)

30 Apr ______ 15.06+__ 1775 ______ 4.47 __ 1808 ____ 13.90 (1987), 5.60 (2016)

NOTABLES:

* tied with 2017 on provisional 01 April mean CET, 02 April record high with 01-02 Apr provisional. Also notable to 03 April with 01-03 April provisionals.

^ Also very cold, 1799 (1.16) and 1917 (1.90) 28 Mar to 03 April.

# Also very cold, 1917 (1.70) for 30 Mar to 05 April.

@ Also very cold, 1807 (3.61) for 16 to 22 April.

+ Another very warm 24-30 April was 14.49 in 1840.

Roger J Smith · April 26, 2017

MAY

Tables are explained above under JANUARY ... basically, the warmest and coldest weeks ending on dates shown (since daily data started in 1772) appear in the first two columns. The second two columns will show either (a) the extreme value since 1940 if the first value is not that recent (in which case the data appear in regular print) or (b) the second highest value when the extreme is that recent (in which case the data appear in italic print).

The second highest value can on a few occasions be the third highest when two years are already tied for the extreme value. A few additional "near miss" values are added by symbols referring to a list at the bottom of the table under the title "NOTABLES:" and these are generally from years that might not otherwise get a mention but come very close to a record value at some point. 2017 and later data will be monitored for new records (some already appeared in March).

The weeks end on the date for which the data appear, e.g., the data for 01 May refers to the week of 25 April to 01 May.

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 May ______ 15.37 __ 1775 ______ 4.27 __ 1782 ____13.66 (1987), 5.81 (2016)

02 May ______ 15.80 __ 1775 ______ 4.17 __ 1782 ____13.10 (1994), 5.46 (1945)

03 May ______ 15.77 __ 1775 ______ 4.21 __ 1782 ____13.23 (2005), 4.83 (1945)

04 May ______ 15.80 __ 1775 ______ 4.01 __ 1782 ____14.59 (1990), 4.57 (1945)

05 May ______ 15.57 __ 1775 ______ 4.44 __ 1782 ____15.54 (1990), 5.09 (1945)

06 May ______ 15.71 __ 1990 ______ 4.60 __ 1877 ____14.89 (1804), 4.84 (1979)

07 May ______ 15.16 __ 1990 ______ 5.06 __ 1877 ____15.14 (1995), 5.09 (1979)

08 May ______ 15.14 __ 1995 ______ 5.34 __ 1782 ____14.91 (1800), 5.91 (1979)

09 May ______ 15.53 __ 2008 ______ 5.77 __ 1782 ____15.30 (1800), 6.30 (1941)

10 May ______ 16.19 __ 2008 ______ 5.90 __ 1861 ____15.56 (1867), 6.23 (1941)

11 May ______ 16.66 __ 2008 ______ 6.03 __ 1861 ____15.46 (1867), 6.44 (1941)

12 May ______ 16.80 __ 2008 ______ 6.10 __ 1861 ____15.90 (2016), 6.69 (1941)

13 May ______ 16.64 __ 2008 ______ 6.11 __ 1861 ____16.46 (1945), 7.24 (2010)

14 May ______ 16.61 __ 1959 ______ 6.36 __ 1902 ____16.09 (2008), 7.13 (2010)

15 May ______ 16.63 __ 1959 ______ 6.31 __ 1902 ____16.46 (1833), 7.37 (2010)

16 May ______ 16.64 __ 1833 ______ 6.29 __ 1839 ____16.39 (1959), 7.39 (1995)

17 May ______ 17.40 __ 1833 ______ 6.39 __ 1839 ____15.57 (1959), 7.09 (1995)

18 May ______ 17.54 __ 1833 ______ 5.99 __ 1935 ____15.40 (1952), 7.20 (1995)

19 May ______ 17.09 __ 1833 ______ 5.53 __ 1935 ____16.31 (1952), 7.13 (1955)

20 May ______ 17.04 __ 1833 ______ 5.89 __ 1935 ____16.67 (1952), 6.70 (1955)

21 May ______ 17.04 __ 1833 ______ 6.17 __ 1891 ____16.56 (1952), 6.59 (1955)

22 May ______ 16.76 __ 1918 ______ 6.16 __ 1891 ____16.10 (1952), 6.80 (1955)

23 May ______ 16.51 __ 1918 ______ 6.69 __ 1891 ____16.34 (1989), 7.33 (1955)

24 May ______ 17.13 __ 1989 ______ 7.27 __ 1891 ____16.31 (1922), 8.20 (1955)

25 May ______ 17.01 __ 1922 ______ 7.63 __ 1817 ____16.86 (1992), 9.09 (1955)

26 May ______ 17.33 __ 1922 ______ 7.06 __ 1821 ____17.16 (1992), 9.66 (1979)

27 May ______ 17.40 __ 1788 ______ 6.89 __ 1821 ____17.03 (1992), 9.51 (1948)

28 May ______ 17.96 __ 1788 ______ 6.74 __ 1821 ____17.36 (1992), 8.89 (1948)

29 May ______ 17.41 __ 2012 ______ 6.91 __ 1821 ____17.17 (1992), 8.60 (1948)

30 May ______ 17.41 __ 2012 ______ 7.34 __ 1821 ____16.99 (1992), 9.00 (1962)

31 May ______ 17.63 __ 1947 ______ 8.00 __ 1821 ____ 17.37 (1944), 8.74 (1962)

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

JUNE

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Jun ______ 18.49 __ 1947 ______ 8.59 __ 1923 ____17.80 (1944), 8.67 (1962)

02 Jun ______ 19.36 __ 1947 ______ 9.04 __ 1962 ____17.57 (1781), 9.16 (1923)

03 Jun ______ 20.53 __ 1947 ______ 8.67 __ 1936 ____18.03 (1781), 8.89 (1975)

04 Jun ______ 20.83 __ 1947 ______ 8.34 __ 1975 ____18.13 (1781), 8.74 (1936)

05 Jun ______ 19.74 __ 1947 ______ 9.09 __ 1975 ____18.59 (1982), 9.20 (1936)

06 Jun ______ 19.16 __ 1982 ______ 9.11 __ 1989 ____18.47 (1947), 9.27*(1936)*

07 Jun ______ 19.19 __ 1982 ______ 9.51 __ 1989 ____18.91 (1950), 9.53 (1991)

08 Jun ______ 19.26 __ 1933 ______ 9.60 __ 1991 ____19.11 (1982), 9.69 (1871)

09 Jun ______ 19.20 __ 1982 ______10.03__ 1814 ____19.09 (1933), 10.24 (1989)

10 Jun ______ 19.09 __ 1940 ______ 9.66 __ 1816 ____19.00 (1846), 10.91 (1971)

11 Jun ______ 19.03 __ 1846 ______ 9.31 __ 1816 ____18.97 (1940), 10.69 (1971)

12 Jun ______ 19.41 __ 1970 ______ 9.66 __ 1816 ____19.09 (1846), 10.59 (1978)

13 Jun ______ 19.56 __ 1970 ______ 9.76 __ 1841 ____18.87 (1846), 10.81 (1979)

14 Jun ______ 18.79 __ 1970 ______ 9.97 __ 1821 ____18.46 (1846), 10.66 (1942)

15 Jun ______ 18.84 __ 1846 _____ 10.17 __ 1821 ____17.90 (1970), 10.53 (1942)

16 Jun ______ 19.19 __ 1846 _____ 10.51 __ 1821 ____17.56 (1989), 10.67 (1987)

17 Jun ______ 19.54 __ 1846 _____ 10.37 __ 1892 ____18.14 (1989), 10.84 (1942)

18 Jun ______ 19.79 __ 1846 ______ 9.83 __ 1892 ____18.79 (1989), 10.94 (1987)

19 Jun ______ 19.91 __ 1846 ______ 9.94 __ 1892 ____18.70 (1989), 11.01 (1956)

20 Jun ______ 20.26 __ 1846 _____ 10.03 __ 1903 ____18.64 (1989), 11.19 (1956)

21 Jun ______ 20.16 __ 1846 _____ 10.30 __ 1903 ____18.43 (1989), 11.07 (1977)

22 Jun ______ 20.39 __ 1846 _____ 10.53 __ 1903 ____18.90 (1941), 11.36 (1977)

23 Jun ______ 19.66 __ 1846 _____ 10.61 __ 1903 ____19.36 (1941), 11.59 (1977)

24 Jun ______ 19.83 __ 1817 _____ 10.61 __ 1823 ____19.31 (1941), 11.93 (1972)

25 Jun ______ 19.79 __ 1817 _____ 11.10 __ 1823 ____19.21 (1941), 12.00 (1980)

26 Jun ______ 19.70 __ 1935 _____ 10.84 __ 1814 ____18.99 (1941), 11.86 (1980)

27 Jun ______ 19.80 __ 1935 _____ 10.80 __ 1814 ____19.71 (1976), 11.93 (1980)

28 Jun ______ 20.94 __ 1976 _____ 11.16 __ 1814 ____20.11 (1878), 11.93 (1980)

29 Jun ______ 21.53 __ 1976 _____ 10.97__ 1835 ____20.44 (1878), 12.10 (1981)

30 Jun ______ 21.73 __ 1976 _____ 11.30 __ 1835 ____20.16^(1878), 12.06 (1981)

NOTABLES:

* 1991, 31 May to 6 June also very cool, 9.36.

^ 1826, 24 to 30 June, 20.09

(rest of data to be posted over the next few days)

Roger J Smith · April 27, 2017

JULY

See previous tables for explanation of data. Second extreme is shown when extreme is 1940 to present. No time limits on that entry so that it could also be 1940 to present, or earlier.

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 July ______ 22.26 __ 1976 _____ 11.64 __ 1919 ____20.47 (1826), 12.06 (1982)

02 July ______ 22.51 __ 1976 _____ 11.64 __ 1919 ____20.66 (1826), 12.27 (1981,97)

03 July ______ 22.84 __ 1976 _____ 11.41 __ 1907 ____20.61*(1826), 12.50 (1997)

04 July ______ 23.16 __ 1976 _____ 11.19 __ 1907 ____20.47 (1826), 12.49 (1954)

05 July ______ 23.34 __ 1976 _____ 11.21 __ 1907 ____20.31^(1826), 12.36 (1954)

06 July ______ 23.47 __ 1976 _____ 11.41 __ 1907 ____20.64 (2006), 12.31 (1954)

07 July ______ 23.54 __ 1976 _____ 11.60 __ 1907 ____20.51 (2006), 12.39 (1954)#

08 July ______ 23.33 __ 1976 _____ 11.67 __ 1907 ____20.36 (1826), 12.41 (1954)#

09 July ______ 22.84 __ 1976 _____ 11.81 __ 1907 ____20.94 (1852), 12.40 (1965)

10 July ______ 21.79 __ 1976 _____ 12.01 __ 1907 ____21.29 (1852), 12.60 (1965)

11 July ______ 21.00 __ 1852 _____ 11.90 __ 1907 ____20.97 (1976), 13.01 (1980)

12 July ______ 21.17 __ 1923 _____ 11.80 __ 1888 ____20.63 (1983), 13.01 (1980)

13 July ______ 21.53 __ 1923 _____ 11.93 __ 1888 ____21.11 (1983), 12.71 (1993)

14 July ______ 21.46 __ 1983 _____12.27_ 1840,79 ___ 20.99 (1923), 12.91 (1993)

15 July ______ 21.76 __ 1983 _____ 12.44 __ 1879 ____20.87 (1923), 12.97 (1980)

16 July ______ 22.03 __ 1983 _____ 12.64 __ 1879 ____21.36 (1808), 13.03 (1980)

17 July ______ 22.16 __ 1983 _____ 12.90 __ 1980 ____21.83 (1808), 12.91 (1879)

18 July ______ 22.20 __ 1808 _____ 12.57 __ 1892 ____21.90 (1983), 13.07 (1980)

19 July ______ 22.10+__ 1808 _____ 12.29 __ 1892 ____21.23 (1983), 13.39 (1980)

20 July ______ 21.81 __ 1825 _____ 12.46 __ 1892 ____20.31 (1983), 13.44 (1980)

21 July ______ 21.31 __ 1825 _____ 12.36 __ 1883 ____21.17 (2006), 13.41 (1980)

22 July ______ 21.87 __ 2006 _____ 12.57 __ 1883 ____20.53 (1868), 13.71 (1980)

23 July ______ 21.91 __ 2006 _____ 12.36 __ 1836 ____20.60 (1989), 14.00 (1980)

24 July ______ 21.79 __ 2006 _____ 12.20 __ 1836 ____21.04 (1989), 13.97 (1983)

25 July ______ 21.87 __ 2006 _____ 12.11 __ 1836 ____21.51 (1989), 13.96 (1970)

26 July ______ 21.69 __ 2006 _____ 12.59 __ 1836 ____21.60 (1989), 14.17 (1973)

27 July ______ 21.47 __ 2006 _____ 12.97 __ 1883 ____21.09 (1989), 14.19 (1973)

28 July ______ 21.20 __ 2006 _____ 12.89 __ 1920 ____20.71 (2019), 14.10 (1973)

29 July ______ 20.86 __ 2006 _____ 12.71 __ 1845 ____20.29 (2019), 13.71 (2015)

30 July ______ 21.46 __ 1948 _____ 12.74 __ 1867 ____20.77 (2006), 13.60 (2015)

31 July ______ 21.93 __ 1948 _____ 12.80 __ 1845 ____ 20.91 (1995), 13.56 (2015)

NOTABLES:

* 20.39 for 27 June to 3 July of 2009.

^ 20.31 for 29 June to 5 July of 2006.

20.84 for 20 to 26 July 2019 and 20.69 for 21 to 27 July 2019.

# 12.84 for 1 to 7 July 1965 and 12.61 for 2 to 8 July 1965 also quite chilly

+ 21.80 for 13 to 19 July 1825

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

AUGUST

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Aug ______ 21.80 __ 1948 _____ 12.73 __ 1867 ____21.54 (1995), 13.49 (2015)

02 Aug ______ 22.13 __ 1995 _____ 12.67 __ 1845 ____21.39 (1948), 13.39 (1966)

03 Aug ______ 22.69 __ 1995 _____ 12.74 __ 1912 ____20.46 (1948), 13.36 (1966)

04 Aug ______ 22.73 __ 1995 _____ 12.73 __ 1912 ____20.66 (1990), 13.50 (1966)

05 Aug ______ 22.30 __ 1995 _____ 12.77 __ 1812 ____20.71*(1975), 13.16 (1956)

06 Aug ______ 21.84 __ 1995 _____ 12.77 __ 1888 ____20.87 (1975), 13.16 (1956)

07 Aug ______ 21.46 __ 1975 _____ 12.64 __ 1812 ____20.94 (1995), 13.27 (1956)

08 Aug ______ 22.09 __ 1975 _____ 12.61 __ 1812 ____20.49^(1933), 13.39 (1956)

09 Aug ______ 22.26 __ 1975 _____ 12.34 __ 1812 ____21.44 (2003), 13.09 (1962)

10 Aug ______ 22.14 __ 2003 _____ 12.03 __ 1812 ____21.71 (1975), 13.06 (1987)

11 Aug ______ 22.27 __ 2003 _____ 12.30 __ 1812 ____21.14 (1997), 12.97 (1987)

12 Aug ______ 22.03 __ 2003 _____ 12.50 __ 1812 ____21.70 (1997), 13.44 (1987)

13 Aug ______ 21.77 __ 1997 _____ 12.46 __ 1912 ____21.54 (2003)), 13.50 (1960)

14 Aug ______ 21.41 __ 1997 _____ 12.06 __ 1912 ____21.10#(1911), 13.11 (1960)

15 Aug ______ 21.01 __ 1997 _____ 11.91 __ 1912 ____20.73 (1911), 13.03 (1960)

16 Aug ______ 20.81 __ 1997 _____ 11.94 __ 1912 ____20.36 (1893), 13.07 (1960)

17 Aug ______ 20.66 __ 1893 _____ 12.17 __ 1912 __ 20.65 (1997),20.65 (1876), 13.14 (1960)

18 Aug ______ 21.26 __ 1893 _____ 12.20 __ 1830 ____20.46 (1947), 13.41 (1960)

19 Aug ______ 21.17 __ 1893 _____ 11.60 __ 1830 ____20.86 (1947), 13.43 (1946)

20 Aug ______ 20.94 __ 1893 _____ 11.49 __ 1830 ____20.90 (1947), 13.23 (1963)

21 Aug ______ 21.06 __ 1995 _____ 11.50 __ 1830 ____21.01 (1947), 13.13 (1970)

22 Aug ______ 21.39 __ 1995 _____ 11.69 __ 1830 ____20.67 (1997), 13.21 (2014)

23 Aug ______ 21.11 __ 1995 _____ 12.04 __ 1830 ____20.59 (1997), 12.99 (2014)

24 Aug ______ 20.53 __ 1995 _____ 11.73 __ 1864 ____20.20 (1997), 12.49 (2014)

25 Aug ______ 20.70 __ 1955 _____ 11.50 __ 1864 ____20.20 (1997), 12.29 (2014)

26 Aug ______ 20.37 __ 1955 _____ 10.76 __ 1864 ____19.90 (1959), 12.60 (1986)

27 Aug ______ 20.30 __ 1955 _____ 11.17 __ 1864 ____19.34 (1976), 12.49 (1986)

28 Aug ______ 19.83 __ 1955 _____ 11.89 __ 1864 ____19.63 (1990), 12.21 (1993)

29 Aug ______ 19.83 __ 1990 _____ 11.71 __ 1890 ____19.23 (1955), 12.21 (1986)

30 Aug ______ 19.51 __ 1930 _____ 11.07 __ 1890 ____19.07 (1942), 12.00 (1956)

31 Aug ______ 19.87 __ 1930 _____ 10.86 __ 1890 ____ 19.23 (1942), 11.71 (1956)

NOTABLES:

* 21.70 for 30 July to 5 August in 1990.

^ 20.33 for 2 to 8 August 2003.

# 20.90 for 8 to 14 August 2003.

Edited August 8, 2019 by Roger J Smith

Roger J Smith · April 28, 2017

(tables continued, see earlier posts for guide to these weekly records) ...

SEPTEMBER

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Sep ______ 19.89 __ 1930 _____ 10.60 __ 1890 ____19.33 (1942), 11.50 (1956)

02 Sep ______ 19.00*__ 1930 _____ 10.91 __ 1890 ____18.91 (1942), 11.49 (1956)

03 Sep ______ 19.11 __ 1906 _____ 10.39 __ 1816 ____18.79 (1984), 11.59 (1956)

04 Sep ______ 19.30 __ 1906 ______ 9.84 __ 1816 ____18.79 (1984), 11.59 (1956)

05 Sep ______ 19.24 __ 1906 ______ 9.37 __ 1816 ____18.64 (1991), 12.23 (1956)

06 Sep ______ 19.36 __ 1906 ______ 8.89 __ 1816 ____18.46 (1991), 12.06 (1965)

07 Sep ______ 18.97 __ 1906 ______ 9.11 __ 1816 ____18.39 (1999), 11.73 (1952)

08 Sep ______ 19.20 __ 1898 ______ 9.96 __ 1816 ____18.17 (1973), 11.06 (1952)

09 Sep ______ 19.96 __ 1898 _____ 10.40 __ 1952 ____18.39 (1973), 10.46 (1790)

10 Sep ______ 19.56 __ 1898 ______ 9.93 __ 1952 ____18.09 (2005), 10.23 (1931)

11 Sep ______ 19.26 __ 1898 ______ 9.83 __ 1952 ____17.53 (2004), 10.64 (1912)

12 Sep ______ 18.57 __ 1898 ______ 9.84 __ 1931 ____17.57 (1959), 10.19 (1952)

13 Sep ______ 18.53 __ 1865 ______ 9.30 __ 1807 ____17.51 (1959), 10.33 (1986)

14 Sep ______ 18.44 __ 1865 ______ 8.74 __ 1807 ____17.61 (2016), 10.17 (1986)

15 Sep ______ 18.41 __ 1865 ______ 8.70 __ 1807 ____17.86 (2016), 9.63 (1986)

16 Sep ______ 18.57 __ 1865 ______ 8.20 __ 1807 ____17.60 (2016), 9.51 (1986)

17 Sep ______ 18.09 __ 1865 ______ 7.91 __ 1807 ____17.57 (2006), 9.39 (1986)

18 Sep ______ 17.67^__ 1865 ______ 7.67 __ 1807 ____17.29#(2016), 9.36 (1986)

19 Sep ______ 17.64 __ 1884 ______ 7.74 __ 1807 ____16.93 (2016), 9.13 (1986)

20 Sep ______ 17.53 __ 1884 ______ 7.94 __ 1807 ____16.93 (2016), 9.13 (1986)

21 Sep ______ 17.36 __ 1884 ______ 8.50 __ 1807 ____16.94 (2006), 9.51 (1986)

22 Sep ______ 16.94 __ 2006 ______ 8.93 __ 1807 ____16.64 (1884), 9.49 (1952)

23 Sep ______ 17.04 __ 2006 ______ 7.94 __ 1807 ____15.97@(1825),9.91 (1952)

24 Sep ______ 17.19 __ 2006 ______ 8.20 __ 1872 ____16.14 (1956), 10.37 (1962)

25 Sep ______ 17.16 __ 2006 ______ 7.87 __ 1872 ____16.57 (1956), 10.47 (2012)

26 Sep ______ 17.30 __ 2006 ______ 7.99 __ 1872 ____16.51 (1956), 10.53 (1943)

27 Sep ______ 17.21 __ 2006 ______ 8.76 __ 1793 ____16.47 (1949), 9.79 (1943)

28 Sep ______ 17.00 __ 1895 ______ 8.86 __ 1885 ____16.74 (1949), 9.60 (1974)

29 Sep ______ 17.67 __ 1895 ______ 8.59 __ 1885 ____16.70 (1949), 9.13 (1974)

30 Sep ______ 18.01 __ 1895 ______ 8.34 __ 1885 ____17.01 (2011), 8.61 (1974)

NOTABLES:

* 18.99 for 27 Aug to 02 Sep 1779 just missed tying.

^ 17.26 for 12 to 18 Sep 1854 was as close as this warm spell came to any extreme value.

# 17.23 for 12 to 18 Sep 2006, these two warm spells 2006 and 2016 were similar for several days.

@ also 15.90 in 1875 and 1989 for week of 17 to 23 September.

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

OCTOBER

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Oct ______ 17.96 __ 2011 ______ 8.14 __ 1974 ____17.67 (1895), 8.26 (1885)

02 Oct ______ 18.31 __ 2011 ______ 7.84 __ 1974 ____16.79 (1985), 7.86 (1808)

03 Oct ______ 18.90 __ 2011 ______ 7.46 _ 1808,23___16.73 (1985), 7.71 (1974)

04 Oct ______ 18.77 __ 2011 ______ 7.26 __ 1817 ____17.51 (1908), 7.79 (1974)

05 Oct ______ 18.34 __ 2011 ______ 6.70 __ 1888 ____17.34 (1908), 8.03 (1974)

06 Oct ______ 17.17 __ 2011 ______ 5.39 __ 1888 ____16.74 (1959), 7.79 (1974)

07 Oct ______ 16.57 __ 1959 ______ 4.99 __ 1888 ____16.09 (1921), 8.10 (1974)

08 Oct ______ 16.79 __ 1921 ______ 5.11 __ 1888 ____16.30 (1959), 8.40 (1974)

09 Oct ______ 17.34 __ 1921 ______ 5.64 __ 1888 ____15.94 (1959), 8.49 (1974)

10 Oct ______ 17.51 __ 1921 ______ 5.94 __ 1888 ____15.46 (1959), 8.30 (1974)

11 Oct ______ 17.56 __ 1921 ______ 6.41*__ 1888 ____15.06 (1949), 7.74 (1952)

12 Oct ______ 17.04 __ 1921 ______ 6.26 __ 1852 ____15.33 (1995), 7.44 (1952)

13 Oct ______ 16.06 __ 1921 ______ 6.34 __ 1852 ____15.60 (1995), 7.13 (1952)

14 Oct ______ 15.44 __ 1921 ______ 6.06 __ 1887 ____15.37 (1995), 7.03 (1952)

15 Oct ______ 15.00 __ 1995 ______ 5.39 __ 1887 ____14.90 (1949), 6.60 (1964)

16 Oct ______ 14.90 __ 1990 ______ 5.04 __ 1887 ____14.89 (1949), 6.24 (1952)

17 Oct ______ 14.86 __ 1990 ______ 4.91 __ 1778 ____14.63 (1995), 6.59 (1981)

18 Oct ______ 14.80 __ 1990 ______ 3.91 __ 1843 ____14.63 (2001), 6.46 (1981)

19 Oct ______ 14.51 __ 1990 ______ 3.17 __ 1843 ____14.46 (1954), 5.40 (1993)

20 Oct ______ 14.10 __ 1954 ______ 3.09 __ 1843 ____13.97 (1990), 5.00 (1993)

21 Oct ______ 13.99 __ 1811 ______ 3.29 __ 1843 ____13.91 (2006), 4.93 (1993)

22 Oct ______ 13.94 __ 1811 ______ 3.29 __ 1843 ____13.91 (2006), 4.93 (1993)

23 Oct ______ 13.76 __ 2013 ______ 3.60 __ 1905 ____13.66 (1977), 5.86 (1993)

24 Oct ______ 13.70 __ 1977 ______ 3.29 __ 1926 ____13.51 (1826), 6.24 (1993)

25 Oct ______ 13.76 __ 2013 ______ 3.50 __ 1926 ____13.57 (1977), 5.80 (2003)

26 Oct ______ 13.69 __ 2013 ______ 2.94 __ 1859 ____12.96 (1996), 5.43 (2003)

27 Oct ______ 13.41 __ 2013 ______ 2.67 __ 1859 ____12.76 (1996), 5.29 (2003)

28 Oct ______ 13.31 __ 2005 ______ 2.24 __ 1895 ____12.91 (2013), 5.60 (2003)

29 Oct ______ 13.60 __ 2005 ______ 1.69 __ 1895 ____13.16 (2009), 5.53 (1997)

30 Oct ______ 14.29 __ 2005 ______ 1.57 __ 1895 ____13.21 (2009), 5.10 (1950)

31 Oct ______ 14.20 __ 2005 ______ 2.16 __ 1895 ____13.44 (1927), 4.73 (1950)

NOTABLES:

* 6.59 also very cool for 5 to 11 Oct 1814

Roger J Smith · April 29, 2017

See previous months for explanation of this section.

NOVEMBER

week ends on __ Max __ year ______ Min __ year _____ From 1940 to present (or 2nd extreme)

01 Nov ______ 13.93 __ 2005 ______ 2.87 __ 1895 ____13.56 (2014), 4.49 (1950)

02 Nov ______ 13.80 __ 2005 ______ 3.00 __ 1836 ____13.63 (2014), 3.61 (1955)

03 Nov ______ 13.51 __ 2005 ______ 3.07 __ 1836 ____12.86*(2014), 4.11 (1955)

04 Nov ______ 12.74 __ 2005 ______ 3.40 __ 1880 ____12.60^(1927), 4.04 (1988)

05 Nov ______ 12.54 __ 2011 ______ 3.53 __ 1782 ____12.01 (2005), 3.74 (1988)

06 Nov ______ 11.97 __ 1996 ______ 3.17 __ 1782 ____11.83 (1818), 4.00 (1988)

07 Nov ______ 11.79 __ 1938 ______ 2.41 __ 1782 ____11.66 (1996), 4.13 (1980)

08 Nov ______ 12.13 __ 1938 ______ 2.40 __ 1782 ____11.67 (2015), 3.76 (1980)

09 Nov ______ 12.54 __ 1938 ______ 2.17 __ 1782 ____11.96 (2015), 3.79 (1980)

10 Nov ______ 12.59 __ 1938 ______ 1.86 __ 1782 ____12.54 (2015), 4.07 (1980)

11 Nov ______ 12.94 __ 2015 ______ 1.97 __ 1782 ____12.44 (1938), 4.33 (2016)

12 Nov ______ 12.71 __ 2015 ______ 1.91 __ 1921 ____12.21 (1938), 4.34 (1980)

13 Nov ______ 12.43 __ 1938 ______ 1.03 __ 1921 ____11.81 (2015), 4.11 (1944)

14 Nov ______ 12.57 __ 1938 ______ 1.06 __ 1919#____11.26 (2015), 3.60 (1944)

15 Nov ______ 12.20 __ 1938 ______ 0.60 __ 1919 ____11.27 (2015), 3.36 (1944)

16 Nov ______ 11.99 __ 1938 ______ 0.10 __ 1919 ____11.14 (2015), 2.63 (1985)

17 Nov ______ 11.99 __ 1938 ______ 0.51 __ 1919 ____11.51 (1990), 2.36 (1965)

18 Nov ______ 11.56 __ 1938 ______ 0.97 __ 1861 ____11.31 (1990), 1.86 (1965)

19 Nov ______ 11.29 __ 1948 ______ 0.97 __ 1861 ____10.94 (1994), 1.66 (1965)

20 Nov ______ 11.19 __ 1994 ______ 0.36 __ 1815 ____11.03 (1948), 2.06 (1965)

21 Nov ______ 10.84 __ 2009 ______ 0.19 __ 1887 ___10.71 (1980,97), 1.93 (1962)

22 Nov ______ 10.97 __ 1980 ______ 0.00 __ 1815 ____10.73 (2009), 1.64 (1962)

23 Nov ______ 11.01 __ 1980 _____ --0.19 __ 1815 ____10.69 (2009), 0.83 (1993)

24 Nov ______ 11.14 __ 1980 ______ 0.03 __ 1858 ____10.93 (2009), 0.37 (1993)

25 Nov ______ 11.04 __ 1980 ______ 0.41 __ 1815 ____10.83 (1994)), 0.57 (1993)

26 Nov ______ 10.66 __ 1994 ______ 0.07 __ 1904 ____10.29 (1980), 0.77 (1993)

27 Nov ______ 10.31 __ 1994 _____ --0.94 __ 1904 ____10.07 (1835), 0.96 (1993)

28 Nov ______ 10.01 __ 1994 _____ --1.27 __ 1904 ____ 9.66 (1835), 0.90 (2010)

29 Nov ______ 10.11 __ 1818 _____ --1.03 __ 1904 ____ 9.56 (2006),--0.23 (2010)

30 Nov ______ 10.26 __ 1818 _____ --1.10 __ 2010 ____ 9.69 (2006), --0.43 (1787)

NOTABLES:

* 12.66 for 28 Oct to 03 Nov in 1927.

^ 12.56 for 29 Oct to 04 Nov in 2011.

# 1.31 for 8 to 14 Nov 1921

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

DECEMBER

01 Dec _______10.10 __ 1818 _____ --1.61 __ 2010 ____ 9.94 (1979), --0.47 (1890)

02 Dec ______ 10.36 __ 1979 _____ --1.86 __ 2010 ____10.16 (1818), --0.50 (1890)

03 Dec ______ 10.20 __ 1979 _____ --2.16 __ 2010 ____ 9.87 (1818), --0.84 (1879)

04 Dec ______ 10.26 __ 1979 _____ --2.14 __ 2010 ____ 9.77 (2000), --1.71 (1879)

05 Dec ______ 10.23 __ 1979 _____ --2.34 __ 1879 ____ 9.96*(2000), --1.51 (2010)

06 Dec ______ 10.14 __ 1979 _____ --2.99 __ 1879 ____10.99 (2015), --1.70 (2010)

07 Dec ______ 10.30 __ 2015 _____ --3.64 __ 1879 ____10.23 (1898), --2.06 (2010)

08 Dec ______ 10.61 __ 2015 _____ --4.03 __ 1879 ____10.04^(1898), --2.16 (2010)

09 Dec ______ 10.34 __ 1934 _____ --3.41 __ 1879 ____10.09 (2015), --1.90#(2010)

10 Dec _______ 9.93 __ 1934 _____ --2.70 __ 1879 ____ 9.70 (2000), --0.99 (2010)

11 Dec _______ 9.97 __ 1856 _____ --2.79 __ 1844 ____ 9.81 (2000), 0.86 (2010)

12 Dec ______ 10.41 __ 1856 _____ --2.63 __ 1844 ____ 9.90 (2000), --1.04 (1981)

13 Dec _______ 9.90 __ 1831 _____ --2.73 __ 1981 _ 9.63 (1994,2000), --2.27 (1844)

14 Dec _______ 9.64 __ 1942 _____ --3.51 __ 1981 ____ 9.46 (1831), --2.94 (1819)

15 Dec _______ 9.39 __ 1942 _____ --3.49 __ 1878 ____ 9.23 (1941), --3.36 (1981)

16 Dec _______ 9.23 __ 1942 _____ --3.53 __ 1878 ____ 9.11 (1941), --3.46 (1981)

17 Dec _______ 9.17 __ 1842 _____ --3.47 __ 1878 ____ 9.04 (1942), --3.27 (1981)

18 Dec _______ 9.51 __ 1985 _____ --3.79 __ 1859 ____ 9.30 (2015), --3.33 (1981)

19 Dec ______ 10.26 __ 2015 _____ --4.89 __ 1859 ____ 9.47 (1985), --2.54 (1981)

20 Dec ______ 11.00 __ 2015 _____ --4.59 __ 1859 ____ 9.47 (1828), --1.90 (1981)

21 Dec ______ 11.46 __ 2015 _____ --3.81 __ 1859 ____10.03 (1828), --2.47 (2010)

22 Dec ______ 11.44 __ 2015 _____ --3.24 __ 2010 ____10.44 (1828), --3.19 (1859)

23 Dec ______ 11.10 __ 2015 _____ --4.17 __ 2010 ____10.36 (1828), --3.07 (1890)

24 Dec ______ 10.54 __ 2015 _____ --4.27 __ 2010 ____10.04 (1828), --3.03 (1890)

25 Dec _______ 9.90 __ 2015 _____ --4.69 __ 2010 ____ 9.26 (1828), --3.17 (1890)

26 Dec _______ 9.49 __ 2015 _____ --4.23 __ 2010 ____ 9.29 (1988), --3.64 (1870)

27 Dec _______ 9.50 __ 2015 _____ --4.44 __ 1870 ____ 9.49 (1988), --3.47 (2010)

28 Dec _______ 9.69 __ 1988 _____ --4.20 __ 1870+____ 9.54 (2015), --2.19 (2010)

29 Dec _______ 9.63 __ 2015 _____ --4.22 __ 1798@___ 9.31 (1974), --2.96 (1962)

30 Dec _______ 9.89 __ 2015 _____ --4.54 __ 1798 ____ 9.24 (1987), --3.04 (1962)

31 Dec _______ 9.71 __ 2015 _____ --4.30 __ 1798 ____ 9.50 (1987), --2.70 (1962)

NOTABLES:

* 9.84 also very mild for 29 Nov to 5 Dec 1775

^ 10.00 also very mild for 2 to 8 Dec 1934

# --1.74 also very cold for 3 to 9 Dec 1844

+ --3.46 also very cold for 22 to 28 Dec 1796, --3.38 for 22 to 28 Dec 1798.

@ --3.89 also very cold for 23 to 29 Dec 1870.

Roger J Smith · May 15, 2017

My edit functions seem to be limited at present, so for now, noting these additions to Central England precip daily extremes between 1 Dec 2016 and 30 April 2017 ...

10 Dec __ 10.3 mm (previous max was 8.5 mm 1958).

No other daily records were broken.

No new dry spell records were set (closest appears to be the 0.3 mm 1-10 April but it was 0.0 mm in 1974).

Roger J Smith · June 8, 2017

NOTE: Cannot edit tables at present, new record high data ... 26 May 18.7 ties 1784.

This changes count for 1784 to 0.5 record highs and 4.0 record lows. The count for 2017 increases to 2.5 and 0.0.

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

New tables of interest -- Warmest month of year

We are used to thinking of the warmest month of the year as being usually July or August with similar monthly mean temperatures. Occasionally it can be June or even September. But this conceals an interesting fact, the warmest month of the year has a higher average than either July or August. And that's only for calendar months, I suspect that the averages for the warmest 31-day period would run a few tenths higher still. From 21 or 22 June to 21 or 22 July of 1976 the average was 20.2 ... and from 24 July to 23 August 1995 it was 20.3, that appears to be the highest 31-day average on record. In 1976 that period was almost 2 deg warmer than either June or July averaged, but this is not always the case, in 2006 July was pretty much the warmest 31-day interval in the year also.

These are the historical averages for the warmest month of the year with a frequency count. Where months are tied, they receive a count of 0.5 rather than 1.0 ... with the less precise means of the 17th century there were considerably more ties recorded and the only case of three months tying (1662, Jun, Jul Aug all at 15.0). These all score 0.33.

Almost all two-month ties are July-August. These are the exceptions:

There were June-August ties in 1685 (14.5) as well as in 1877 (15.2), and June-July ties in 1711 (15.5) and also in 1785 (16.1), in 1866 (15.5),1889 (15.3) and 1896 (16.2). The frequency of ties of all kinds is about 30% in the 17th century and drops to about 5-10% thereafter. In fact there have been only five ties (all July-August) since the start of the 20th century. Those were in 1911, 1974, 1996 and 2008, 2015. (You can't tell directly from the table how many ties there are since every two ties will sum to zero decimals.)

August was warmest in all years or at least tied from 1702 to 1706, the longest such interval. The frequency of warmest months in August ran ahead of July for the first six decades of the 18th century before falling behind slightly near the end of the century. There were several more runs of three or four warm Augusts.

The only consecutive warmest Junes were in 1785 (tied with July) and 1786, then 1845 and 1846, The last time there was a warmest month in June was 1970. There were four between 1950 and 1970 inclusive (the others were 1960 and 1966).

The only warmest month in September was in 1890 when 14.6 beat July by 0.1. The closest September came otherwise was 1961 (missed by 0.2) and 1865 and 2011 (both missed by 0.3).

The closest that May has come to being warmest would be 1833 (15.1 missed by 0.7).

The closest that October has come to being warmest is 2.7 deg in 1954 (11.9 vs 14.6).

INTERVAL ____ Mean warmest month ___ Jun _ Jul _ Aug _ Sep

1659-1700 ______ 15.8 _______________ 3.83_26.83_11.33 _ 0

1701-1800 ______ 16.5 _______________ 5.00_50.50_44.50 _ 0

1801-1900 ______ 16.2 _______________ 8.00_54.50_36.50 _1.0

1901-2000 ______ 16.4 _______________ 7.00_54.50_38.50 _ 0

2001-2016 ______ 17.1 _______________ 0.00_ 7.00 _ 9.00 _ 0

1961-1990 ______ 16.4 _______________ 2.00_16.50_11.50 _ 0

1971-2000 ______ 16.8 _______________ 0.00_17.00_13.00 _ 0

1981-2010 ______ 17.1 _______________ 0.00_16.00_14.00 _ 0

1659-2016 ______ 16.33 ______________23.83_193.33_139.83_ 1.0

__________________________________________________________________

The lowest value for this statistic is 13.5 in 1695 (July). Second lowest was 13.8 in 1725 (July) and 1922 (June).

Roger J Smith · July 8, 2017

New records to report from June ...

CENTRAL ENGLAND PRECIP

27th _ 23.6 mm rain (narrowly edges out 23.3 mm from 1973)

WARMEST WEEKS

The warm spell in mid-June broke some records, mainly in the recent portion of the table ... this is what the table looked like before and after this spell ..

(before)

Week ending _ MAX ___ YEAR ____ MIN ___ YEAR ___ RECENT (1940-present)

20 Jun ______ 20.26 __ 1846 _____ 10.03 __ 1903 ____18.64 (1989), 11.19 (1956)

21 Jun ______ 20.16 __ 1846 _____ 10.30 __ 1903 ____18.43 (1989), 11.07 (1977)

22 Jun ______ 20.39 __ 1846 _____ 10.53 __ 1903 ____18.90 (1941), 11.36 (1977)

23 Jun ______ 19.66 __ 1846 _____ 10.61 __ 1903 ____19.36 (1941), 11.59 (1977)

(after)

20 Jun ______ 20.26 __ 1846 _____ 10.03 __ 1903 ____18.86 (2017), 11.19 (1956)

21 Jun ______ 20.16 __ 1846 _____ 10.30 __ 1903 ____19.53 (2017), 11.07 (1977)

22 Jun ______ 20.39 __ 1846 _____ 10.53 __ 1903 ____19.83 (2017), 11.36 (1977)

23 Jun ______ 19.70 __ 2017 _____ 10.61 __ 1903 ____19.70 (2017), 11.59 (1977)

Roger J Smith · August 7, 2017

In the record daily rainfalls for July, 11th (10.5, 1953) has been replaced by 11.7 mm in 2017.

This was one of the lower July daily records.The only other July records this amount would have passed were on 4th, 5th, 19th and 23rd. The record for the previous day was 50.0 mm.

Roger J Smith · August 8, 2017

duplicate post removed

Edited April 5, 2019 by Roger J Smith

Roger J Smith · August 8, 2017

Wettest 10-day intervals (CEP) 1931 to 2018

includes Jan to end of Sep 2019

Note: Highest 10-day totals for Central England Precip (mm) are shown for each date with the 10 days ending on that date. This means that entries for Jan 1 to 9 include some days from previous December, year cited will be year of last date in the ten-day interval. For example, 61.3 mm fell Dec 23 1978, to Jan 1 1979.

Intervals that end 29 Feb can only be leap years, which explains the much lower value, to compare the same starting date as this for all years, check next date (1 Mar) for non-leap-year max.

Intervals that end March 1 to 9 could include a leap year day. They mostly do not (only 8 and 9 March do) and a column only used for 1 to 9 March gives the highest value for leap years. When the highest value includes a leap year day, valid 8 and 9 March 2016, the value in the first March column will be lower and in italics, and does not include a leap year day.

Amounts are in mm to nearest tenth,.

<<< MAXIMUM 10-DAY TOTALS ending on DATES SHOWN >>>

___ JAN ________FEB _______MAR _____ incl LYD _____APR ______MAY ______ JUN

01 _ 61.3 1979 __ 74.7 1960 __ 49.5 1958 __ 27.4 1936 __ 47.1 2018 __ 65,6 1981 __ 60.2 2000

02 _ 56.2 2003 __ 68.0 1960 __ 48.9 1958 __ 28.4 1936 __ 50.3 2018 __ 64.3 1981 __ 57.9 2000

03 _ 56.2 2003 __ 50.9 1960 __ 45.3 1933 __ 28.0 2000 __ 51.6 2018 __ 65.6 1981 __ 62.7 2008

04 _ 54.6 2003 __ 52.1 1960 __ 44.7 1933 __ 28.0 2000 __ 54.8 2018 __ 58.5 2012 __ 55.7 2000

05 _ 49.7 1998 __ 52.3 1960 __ 45.7 1933 __ 27.7 2016 __ 50.5 2018 __ 54.0 1978 __ 46.3 1992

06 _ 52.1 1998 __ 52.8 1980 __ 40.9 2007 __ 28.4 2016 __ 49.3 2018 __ 48.1 1978 __ 46;3 1999

07 _ 51.5 1998 __ 57.6 1980 __ 41.1 1998 __ 29.3 2016 __ 46.9 2018 __ 48.2 1978 __ 57.4 1999

08 _ 53.2 1998 __ 57.4 1980 __ 41.8 1998 __ 47.2 2016 __ 45.3 1987 __ 47.6 1978 __ 55.5 2012

09 _ 50.5 1998 __ 51.4 1946 __ 50.1 1999 __ 54.3 2016 __ 56,2 1998 __ 43.4 1978 __ 53.0 2012

10 _ 60.5 1948 __ 51.5 1950 __ 50.4 2016 _____________ 66.2 1998 __ 42.9 1969 __ 53,6 2019

11 _ 60.7 1948 __ 49.5 2001 __ 48.9 1981 _____________ 63,3 1998 __ 42.9 1969 __ 66.5 2019

12 _ 64.4 1948 __ 50.5 2001 __ 51.9 1947 _____________ 58.1 1998 __ 42.1 1969 __ 85.7 2019

13 _ 64.1 1948 __ 45.9 1950 __ 58.7 1947 _____________ 56.2 1998 __ 51.2 2007 __ 92.5 2019

14 _ 60.7 1948 __ 45.4 1950 __ 52.9 1981 _____________ 62.2 1998 __ 59.5 1967 __ 89.2 2019

15 _ 61.6 1948 __ 40.8 2014 __ 51.2 1947 _____________ 64.9 1998 __ 59.1 2007 __ 90.5 2019

16 _ 51.0 1948 __ 39.5 1951 __ 54.2 1947 _____________ 62.8 1998 __ 65.0 2007 __ 91.7 2019

17 _ 54.6 2008 __ 40.6 1951 __ 59.3 1947 _____________ 61.9 1998 __ 63.2 2007 __ 83.0 2019

18 _ 55.0 2008 __ 46.2 1977 __ 60.1 1947 _____________ 56.9 1998 __ 62,0 2007 __ 85.1 2019

19 _ 60.4 2008 __ 40.4 1977 __ 59.4 1947 _____________ 42.0 2000 __ 62.5 1967 __ 83.5 2019

20 _ 66.3 2008 __ 39.2 1951 __ 58.1 1947 _____________ 43.8 1999 __ 63.3 1967 __ 68.8 2007

21 _ 53.4 2008 __ 35.0 1977 __ 60.5 1947 _____________ 40.5 1999 __ 63.7 1967 __ 73.0 2007

22 _ 53.0 2008 __ 43.1 1977 __ 56.9 1964 _____________ 41.1 1986 __ 54.2 1967 __ 76.8 2007

23 _ 52.8 2008 __ 51.7 1977 __ 58.6 1964 ____________40.8 1986,99 _ 59.1 1932 __ 68.6 2007

24 _ 48.3 1937 __ 60.2 1977 __ 45.3 1965 _____________ 43.1 1971 __ 59.2 1932 __ 69.5 2007

25 _ 56.3 1939 __ 59.4 1977 __ 48.7 1965 _____________ 47.8 2012 __ 56.3 1932 __ 72.0 2007

26 _ 60.2 1939 __ 59.1 1977 __ 49.1 1965 _____________ 62.2 1981 __ 57.8 1932 __ 76.3 1982

27 _ 54.3 1995 __ 55.5 1977 __ 45.6 1955 _____________ 62.4 1981 __ 67.4 1932 __ 74.4 1973

28 _ 64.7 1960 _49.5 1958,77__44.7 1955 _____________ 64.2 1981 __ 74.8 1932 __ 74.4 1973

29 _ 71.5 1960 __ 27.6 1936 _44.8 1955,79 ____________ 64.2 1981 __ 76.8 1932 __ 71.2 1997

30 _ 72.2 1960 __ xxxxxxxxx __ 44.7 1955 _____________ 65.6 1981 __ 68.4 1932 __ 76.8 1997

31 _ 70.6 1960 __ xxxxxxxxx __ 44.7 1955 _____________ xxxxxxxxx __ 61.3 2000 __ xxxxxxxx

____ JUL _______AUG ______ SEP ______ OCT ______ NOV ______ DEC

01 _ 72.4 1997 __ 60.9 1969 __ 53.1 1997 __ 85.8 2019 __ 63.3 1960 __ 50.1 1965

02 _ 72.7 1997 __ 64.6 1969 __ 55.1 1986 __ 81.8 2019 __ 58.1 1960 __ 49.8 1965

03 _ 73.8 1997 __ 67.5 1969 __ 56.1 1986 __ 80.8 1976*__59.8 1940 __ 56.9 1960

04 _ 73.8 1997 __ 68.6 1969 __ 54.4 1931 __ 60.1 1976 __ 70.8 1940 __ 56.7 1960

05 _ 57.4 1958 __ 70.5 1969 __ 59.2 1931 __ 53.0 1991 __ 78.2 1940 __ 53.0 1965

06 _ 61.7 1963 __ 69.1 1956 __ 59.5 1931 __ 54.5 1976 __ 81.5 1940 __ 49.0 1965

07 _ 61.5 1963 __ 76.6 2002 __ 59.5 1931 __ 55.6 1958 __ 82.9 2000 __ 49.1 1972

08 _ 46.2 2007 __ 78.4 2002 __ 60.3 1965 __ 54.3 1958 __ 81.6 1940 __ 51.4 1972

09 _ 61.0 1936 __ 60.1 1939 __ 61.7 2008 __ 52.6 1974 __ 81.3 1940 __ 52.3 1972

10 _ 67.5 1968 __ 62.7 1939 __ 60.2 1931 __ 54.7 1974 __ 65.3 1940 __ 54.4 1972

11 _ 69.7 1968 __ 74.8 1948 __ 60.7 1965 __ 51.4 1987 __ 76.6 1940 __ 48.2 1937

12 _ 69.2 1968 __ 65.6 2004 __ 59.5 1965 __ 59.1 1993 __ 64.1 1940 __ 49.3 1965

13 _ 70.4 1968 __ 71.5 2004 __ 53.6 1993 __ 61.8 1993 __ 59.6 1940 __ 63.1 1979

14 _ 81.5 1968 __ 71.4 2004 __ 60.0 1994 __ 59.7 1993 __ 57.4 2002 __ 64.1 1979

15 _ 83.2 1968 __ 70.0 2004 __ 70.0 1994 __ 75.3 1987 __ 56.8 1993 __ 61.6 1979

16 _ 91.2 1968 __ 73.5 2004 __ 69.7 1994 __ 74.3 1987 __ 56.7 1993 __ 64.4 1989

17 _ 80.8 1968 __ 81.4 2004 __ 66.1 1994 __ 71.2 1939 __ 56.8 1940 __ 64.4 1989

18 _ 79.2 1968 __ 83.5 2004 __ 66.4 1994 __ 70.5 1939 __ 57.4 1940 __ 82.7 1989

19 _ 78.9 1968 __ 47.3 2004 __ 72.5 1994 __ 59.2 2002 __ 63.8 1946 __ 86.4 1989

20 _ 60.0 2001 __ 52.5 2004 __ 75.3 1994 __ 72.2 2002 __ 69.9 1946 __ 95.9 1989

21 _ 63.6 1973 __ 52.1 1977 __ 71.8 1994 __ 73.9 2002 __ 71.8 1946 __ 94.0 1989

22 _ 64.6 1973 __ 53.0 1977 __ 68.0 1994 __ 74.1 2002 __ 71.8 1946 __ 90.2 1989

23 _ 65.4 1973 __ 52.8 1977 __ 67.8 1994 __ 65.5 2002 __ 69.2 1946 __ 70.7 1989

24 _ 63.1 1973 __ 62.8 1977 __ 62.8 1935 __ 62.3 2002 __ 60.1 2012 __ 60.0 1989

25 _ 51.5 2001 __ 64.4 1977 __ 59.6 1992 __ 74.5 1949 __ 63.9 2012 __ 54.1 2012

26 _ 58.0 2007 __ 66.5 2010 __ 59.7 1992 __ 68.7 1949 __ 66.6 2012 __ 57.4 2012

27 _ 54.7 2007 __ 66.1 2010 __ 63.1 2000 __ 66.3 1949 __ 68.5 2012 __ 61.1 2012

28 _ 56.3 2007 __ 66.3 2010 __ 59.4 1976 __ 66.2 1945 __ 69.3 2012 __ 62.2 2012

29 _ 60.9 1969 __ 61.6 2010 __ 64.2 2019 __ 76.1 1945 __ 68.2 2012 __ 60.8 1978

30 _ 60.9 1969 __ 59.9 2010 __ 83.0 2019 __ 72.6 1945 __ 59.7 2012 __ 59.6 2002

31 _ 60.9 1969 __ 57.9 2010 __ xxxxxxxxx __ 65.4 1945 __ xxxxxxxxx __ 58.6 1978

________________________________________________________________________

* may be broken in 2019, provisional is 82.9 mm.

Edited October 6, 2019 by Roger J Smith

Roger J Smith · August 8, 2017

(copy before June 2019) _ There are numerous examples of consecutive entries in the 10-day wet intervals, making them essentially wet 14 to 20 day intervals. One of the longest, from late October 1940 to mid-November of 1940, was using 20 consecutive days and 11 consecutive intervals, but a slightly higher value in 2000 on one day in the series truncated that 20-day period. Another similar case was in Feb 1977 which used 20 consecutive days but failed to overcome one entry already in the table from 1951. The longest surviving interval without any interruption is 19 days, from 1 to 19 July 1968 (providing 10 to 19 July in the tables), and also from 31 March to 18 April 1998 (providing the maxima for April 9 to 18 in the table), also tied by 5 to 23 September 1994 (19 days) providing the maxima for 14 to 23 September in the table. The 18 day interval from 7 to 24 Dec 1989 is noteworthy because it contains the highest value in the table, 95.9 mm (11-20 Dec 1989). The wet June of 2007 provided an 18 day spell 8th to 25th June. Another 18 day interval was 3 to 20 August of 2004.

(after June 2019) _ The June 2007 period was partly washed away by higher totals in a somewhat earlier but partly overlapping interval of June 2019. Each 10-day interval ending 10th to 19th June broke records. That makes the period 1-19 June 2019 equal to the previous two intervals without interruptions (31 Mar to 18 Apr 1998 and 5 to 23 Sep 1994). The interval from 29 Sep to 2 Oct 2019 took away four from 1976 (and 3 Oct will likely join that for a net 14 day wet spell 20 Sep-3 Oct).

As to the historical frequency, this table indicates the number of days in each decade per month. Three days out of the 366 in the year had a tied value and these count for 0.5 in the frequency table below. Only the higher values from 1 to 9 March are counted.

It should be noted that since the entries in the table end on dates in various months, the frequencies refer to nine days from the previous month as well as all the days in the given month:

To compare the last entry (2011-17) to other decades, multiply by 1.5, as we are almost exactly two-thirds of the way through this decade. No entries were found for 2017 anyway. (this has since been amended to 2011-Mar 2019 and some values were found in 2018. Multiply by 1.1 for Jan-Mar and 1.25 for Apr to Dec, 1.2 for the total to compare. This has been further amended for June 2019, the decade is now almost complete so little adjustment is now required.

Frequency ____ JAN _ FEB _ MAR _ APR _ MAY _ JUN _ JUL _ AUG _ SEP _ OCT _ NOV _ DEC __ TOTAL

1931-40 ______ 3 ____ 1 ____ 3 ____ 0 ____ 8 ____ 0 ___ 1 ____ 2 ___ 6 ___ 2 ___ 12 ____ 1 _____ 39

1941-50 ______ 7 ____ 4 ____ 9 ____ 0 ____ 0 ____ 0 ___ 0 ____ 1 ___ 0 ___ 7 ____ 5 ____ 0 _____ 33

1951-60 ______ 4 ____8.5 ___6.5 ___ 0 ____ 0 ____ 0 ___ 1 ____ 1 ___ 0 ___ 2 ____ 2 ____ 2 _____ 27

1961-70 ______ 0 ____ 0 ____ 5 ____ 0 ____ 8 ____ 0 ___15____ 5 ___ 3 ___ 0 ____ 0 ____ 5 _____ 41

1971-80 ______ 1 ___ 12.5 __ 0.5 ___ 1 ____ 5 ____ 2 ___ 4 ____ 5 ___ 1 ___ 4 ____ 0 ____ 9 _____ 45

1981-90 ______ 0 ____ 0 ____ 2 ___ 6.5 ____3 ____ 1 ___ 0 ____ 0 ___ 2 ___ 3 ____ 0 ____ 9 _____ 26.5

1991-2000 ____ 6 ____ 0 ____ 1 ___14.5 ___ 1 ____ 8 ___ 4 ____ 0 ___15 ___4 ____ 3 ____ 0 _____ 56.5

2001-10 ______10____ 2 ____ 1 ____ 0 ____ 5 ____ 7 ___ 6 ____17 ___1 ___ 6 ____ 1 ____ 1 _____ 57

2011-19 (Oct)___0 ____1 ____ 3 ____ 8 ____ 1 ____12 ___ 0 ____ 0 ___ 2 ___ 3 ____ 7 ____ 4 _____ 41

The above analysis combined with some inspection of the data shows that long wet spells were less frequent from about 1941 to 1974 than from 1975 to 2012, but have become less frequent again since 2013. April 2018 registered seven however, and June 2019 had ten.

The interval from 1998 to 2004 had a particularly high count, resumed in 2007 after two years that did not register.

The decade 1951-60, while generally not prolific, was active in the first quarter of the year.

Edited October 6, 2019 by Roger J Smith

Roger J Smith · September 11, 2017

August 2017 daily precip records:

10.6 mm on 16th tied 2008 daily record (as I round them off, but it was 10.59 in 2017 vs 10.57 in 2008).

19.2 mm on 8th failed to break a record from 1992 (20.6 mm) but would have been a daily record on quite a few days in August including the 7th and any of 10th to 18th except 14th.

There were no new daily temperature records.

Roger J Smith · November 2, 2017

Changes to earlier posted tables (can't edit them at present) ...

OCT daily temp records

14 _ 17.2 _ replaces 16.1 (1990) reduces 1990 by one record high

16 _ 16.4 _ replaces 15.8 (1818) reduces 1818 by one record high

(24 _ 14.2 and 25 _ 13.9 fell 0.1 short of daily records in each case).

OCT daily rainfall records _ data not posted yet, watch for later update

Also, confirming that warmest daily of summer (year) 2017 was 21.9 on 19th June. This was the same date as 2001 and 2005, and is earlier than all but 23 years out of 245 in the series, with one of those having one earlier and one later warmest day.

Roger J Smith · January 10, 2018

Unable to edit posts, so noting these updates ...

No new daily records in temp or precip Nov-Dec 2017.

Rainfall of 17.8 mm on 26 Dec would have set records on any of the four preceding days but was unable to shift the higher value of 18.1 mm set on Boxing Day of 2014.

Roger J Smith · March 24, 2018

CET 30-year averages __ highest and lowest values to 1988-2017

This table presents the highest and lowest 30-year CET averages (two decimals) since the first one in 1659 to 1688.

**note: Jan 1988-2017 was matched by Jan 1989-2018 as Jan 2018 had same value as Jan 1988 (5.3 C).

Since most of the warmest averages are quite recent, an additional entry shows the warmest prior to 1921 to 1950.

... the one exception is June, the warmest interval of 14.72 was 1822-1851 and the maximum in recent years is 14.59 (1988-2017).

^ note: Apr 1774 to 1803 and Apr 1920 to 1949 matched this value but the one shown is highest by third decimal.

* note: July 1988 to 2017 matched 1981 to 2010 but was higher by third decimal.

Also, the coldest 30-year interval later than 1921-50 is also shown.

& symbol indicates that the following 30-yr interval was equal (coldest May 1688-1717, warmest pre-1950 August 1780-1809).

... also coldest Dec 1784 to 1813 was equal.

# symbol for coldest October ... 8.92 1867 to 1896 came within .01 of matching the previous low 1675 to 1704.

# symbol for coldest November ... 5.24 (1786 to 1815) came within .03 of matching the previous low 1673 to 1702.

MONTH ____ Highest _ period ____ Highest to 1950 _ period _I___ Lowest _ period __ Lowest since 1950 _ period

__JAN ______ 4.74**_ 1988-2017 ____ 4.37 ___ 1910-1939 __I___ 2.03 _ 1766-1795 ____ 3.11 __ 1939-1968

__FEB ______ 4.96 __ 1988-2017 ____ 4.66 ___ 1856-1885 __I___ 2.55 _ 1670-1699 ____ 3.58 __ 1962-1991

__MAR______ 6.83 __ 1988-2017 ____ 5.92 ___ 1921-1950 __I___ 4.31 _ 1672-1701 ____ 5.58 __ 1951-1980

__APR______ 8.78 __ 1987-2016 ____ 8.29 ___ 1849-1878^__I___ 6.96 _ 1673-1702 ____ 7.82 __ 1962-1991

__MAY_____ 11.82 __ 1988-2017 ___ 11.63 ___ 1784-1813 __I___10.59 _ 1687-1716&___11.12 __ 1955-1984

__JUN______14.72 __ 1822-1851 ___14.72 ___ 1822-1851 __I___13.80 _ 1900-1929 ____14.07 __ 1971-2000

__JUL______ 16.71*__ 1988-2017 ___16.33 ___ 1756-1785 __I___15.47 _ 1671-1700 ____15.84 __ 1953-1982

__AUG______16.47 __ 1988-2017 ___16.02 ___ 1779-1808&_I___14.90 _ 1671-1700 ____15.61 __ 1945-1974

__SEP______14.15 __ 1987-2016 ___14.00 ___ 1721-1750 __I___12.30 _ 1671-1700 ____13.50 __ 1950-1979

__OCT______11.01 __ 1988-2017 ___10.04 ___ 1921-1950 __I___ 8.91 _ 1675-1704#____ 9.90 __ 1922-1951

__NOV ______ 7.32 __ 1986-2015 ___ 6.54 ___ 1707-1736 __I___ 5.21 _ 1673-1702#____ 6.47 __ 1923-1952

__DEC ______ 5.06 __ 1971-2000 ___ 4.75 ___ 1895-1924 __I___ 3.09 _ 1783-1812&____ 4.33 __ 1923-1952

_YEAR _____ 10.14 __ 1988-2017 ___ 9.55 ___ 1920-1949 __I___ 8.45 _ 1672-1701 _____ 9.48 __ 1952-1981

... note: before mid-20th century, warmest 30-year interval was 1710-39, at 9.44 .. coldest since 1952-81 was also

9.48 in 1958-87.

It is interesting to note that many of the warmest intervals before 1921-50 were a long way back in the records.

This chart shows when the warmest 30 years up to 1921-50 occurred.

(Maunder)

_________ NOV SEP JUL

__________________ AUG+MAY

_____________________(Dalton)_JUN _APR+FEB _ DEC JAN MAR+OCT/1950

Summer was generally warmer in the 18th century than at any time until past 1950.

The only months that have been steadily warming seem to be March and October.

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