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Roger J Smith

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

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I am hoping to be able to edit some of the tables in this thread but until that becomes possible ...

new daily record --3.8 C min for 1st of March (2018)

The value of --1.1 C on 18th narrowly missed the previous mark of --1.3 (1853). 

I noticed in passing that the title of post 2 has vanished (it should read CET means 1981-2010). 

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Some new records to note:

First, 30 March 2018 CEP (rainfall) new record is 14.0 mm (previously 8.7 in 1992).

Then on the temperature front, two new daily records in April 2018

18 Apr ... 17.0 (2018) was 14.5 (1945)
19 Apr ... 17.6 (2018) was 15.4 (1870) .

This removed from the chronicles the short period of 12 days from 18 Apr 1945 (before this year max daily record) to 30 Apr 1945 (minimum daily record).

This year showed a similar tendency with two days to spare when it went from 17.6 on 19th to 6.5 on 29th. However that's nowhere near a daily minimum record until we get well on into May. 

The 17.6 was the second warmest day ever in mean April daily temperatures and the 17.0 was joint fourth. First and third still belong to 1775 and the other joint fourth was the 16th of 1945 which remains the earliest 17.0; 19th April is the earliest 17.1 or higher to 17.6. The all time record of 19.7 goes to 29th April of 1775. 

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Two new daily rainfall records for the CEP (1931 to present) in April, these are:

1st _ 15.3 mm (was 12.9, 1973)

27th _ 10.0 mm (was 8.7, 2003).

April was seventh wettest since 1981 with a total of 78.0 mm, so not record-breaking in the CEP zone at least. The UKP average was 91.5 mm. 

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Warmest and coldest weeks (1772 to present)

This table shows the warmest and coldest weeks ending on each date of the year. The weeks ending 1 Jan to 6 Jan use some number of days from the previous December so the years are shown like 1987-88 for the warmest 25 Dec to 01 Jan. The periods around 1 to 6 March are blind to leap year day (in other words they are all seven-day intervals and could be in leap years including leap year day; the one exception is the week 23 Feb to 29 Feb which has to be in a leap year. Top and bottom three values are shown to two decimal places. Values in bold coloured type are extremes within the month. Values in bold italic where listed would break that extreme using some days of the month in question. As with January, this could happen at both ends of the month. When that is the case, the less extreme of the two has an asterisk beside it. For example, 9.84 for 26 Dec to 2 Jan is warmer than the entirely January date max of 9.36, but the interval of 31 Jan to 6 Feb (2004) is warmer than both. The least extreme case entirely within any month is shown in italic print, and that set is not augmented with values within two months. For example, the max of 8.46 for 4-10 Jan and 10-16 Jan is the lowest value of the 25 between 7 and 31 January. The reader can use the data near ends of January to assess whether that value is subject to revision if any date in January is considered (in this case, no extreme is lower than 8.46). 

 

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 Jan ___ 9.77 1987-88 __ 9.23 2015-16 __ 9.19 1920-21  ___ -3.86 1798-99 __-3.60 1892-93 __-3.51 1870-71

02 Jan ___ 9.84*1987-88 __ 9.17 1920-21 __ 9.03 1883-84  ___ -3.69 1892-93 __-3.37 1870-71 __-3.21 1798-99

03 Jan ___ 9.33 1987-88 __ 9.03 1920-21 __ 9.00 1934-35  ___ -3.44 1892-93 __-3.43 1785-86 __-3.03 1870-71

04 Jan ___ 9.21 1920-21 __ 9.00 1916-17 __ 8.86 1934-35  ___ -4.21 1785-86 __-3.37 1892-93 __-3.24 1870-71

05 Jan ___ 9.07 1915-16 __ 8.93 1920-21 __ 8.33 1934-35  ___ -3.99 1785-86 __-3.80 1794-95 __-3.69 1892-93

06 Jan ___ 9.27 1915-16 __ 8.73 1920-21 __ 8.64 1991-92  ___ -4.10 1794-95 __-3.61 1892-93 __-3.44 1785-86

07 Jan ___ 9.17 1916____ 8.83 1992 ____8.43 1932 _____ -3.91 1795____-3.51 1864____ -3.34 1893

08 Jan ___ 8.96 1992____ 8.49 1916 ____8.37 2013 _____ -3.73 1864 & 1894 __________ -3.16 1795

09 Jan ___ 8.47 1957____ 8.36 2007 ____8.29 1950 _____ -3.96 1841____-3.67 1894____ -3.11 1864

10 Jan ___ 8.46 2007____ 8.41 1873 ____8.17 1884 _____ -3.76 1841____-2.99 1814____ -2.77 1820

11 Jan ___ 8.56 1976____ 8.54 1873 ____8.41 1890 _____ -3.51 1814____-3.43 1841____ -2.60 1879

12 Jan ___ 9.14 1976____ 8.53 1873 ____8.47 2007 _____ -4.17 1814____-3.17 1982____ -3.10 1841

13 Jan ___ 9.16 1976____ 8.91 2007 ____8.76 1873 _____ -4.61 1814____-4.03 1982____ -3.81 1838

14 Jan ___ 9.09 1976____ 8.89 1873 ____8.73 1998 _____ -4.97 1814____-4.77 1838____ -4.74 1982

15 Jan ___ 8.77 1873____ 8.76 1976 ____8.61 1998 _____ -5.61 1838____-5.31 1814____ -4.89 1982

16 Jan ___ 8.46 1976____ 8.39 1796 ____8.34 1873 _____ -5.46 1838____-5.09 1814____ -4.81 1820

17 Jan ___ 8.63 1796____ 8.44 1875 ____8.36 2007 _____ -5.19 1838____-4.93 1881____ -4.86 1814

18 Jan ___ 8.84 1796____ 8.71 1875 ____8.67 1804 _____ -5.63 1881____-5.03 1838____ -4.36 1814

19 Jan ___ 8.93 1796____ 8.91 1804 ____8.79 1875 _____ -5.74 1881____-5.07 1838____ -3.71 1814

20 Jan ___ 8.77 1932____ 8.71 1796 ____8.71 1804 _____ -6.30 1881____-6.16 1838____ -3.76 1823

21 Jan ___ 8.90 1796____ 8.89 1932 ____8.67 1804 _____ -6.44 1881____-5.50 1838____ -4.27 1940

22 Jan ___ 8.84 1796____ 8.79 1932 ____8.36 1804 _____ -6.33 1881____-4.70 1940____ -4.46 1795

23 Jan ___ 9.01 1828____ 8.69 1796 ____8.44 1932 _____ -5.67 1881____-5.00 1795____ -4.79 1940

24 Jan ___ 9.13 1828____ 8.70 2008 ____8.59 1796 _____ -5.64 1881____-5.11 1795____ -4.87 1963

25 Jan ___ 8.94 1846____ 8.90 1918 ____8.79 1828 _____ -6.00 1795____-5.90 1881____ -5.19 1963

26 Jan ___ 9.11 1918____ 8.97 1846 ____8.96 1834 _____ -6.10 1881____-5.99 1795____ -5.04 1963

27 Jan ___ 9.36 1834____ 9.14 1969 ____9.04 1846 _____ -5.36 1881____-4.56 1963____ -4.24 1795

28 Jan ___ 9.29 1834____ 8.87 1846 ____8.84 2016 _____ -4.29 1945____-3.81 1963____ -3.80 1881

29 Jan ___ 9.00 2016____ 8.73 1846 ____8.47 1921 _____ -4.46 1945____-3.76 1776____ -2.74 1795

30 Jan ___ 8.84 1921____ 8.71 1846 ____8.64 2016 _____ -4.54 1776____-4.03 1945____ -2.56 1784

31 Jan ___ 8.93 1846____ 8.51 1843 ____8.36 1921&2002_ -5.54 1776____-2.70 1947____ -2.64 1895

01 Feb ___ 8.93 1846____ 8.67 1843 ____8.53 1923 _____ -6.24 1776____-2.97 1895____ -2.81 1947

02 Feb ___ 9.34 1923____ 9.31 2002 ____8.90 1959 _____ -5.47 1776____-3.03 1954____ -2.69 1895&1947

03 Feb ___ 9.64 1923____ 9.31 1959 ____9.24 2002 _____ -4.14 1776____-3.19 1954____ -2.80 1830

04 Feb ___ 9.53 1923____ 9.34 1862 ____9.11 1914 _____ -3.34 1830____--3.06 1954____ -2.56 1912

05 Feb ___ 9.81 2004____ 9.24 1862 ____9.21 1914 _____ -4.29 1830____-3.07 1954____ -2.61 1799

06 Feb ___10.37 2004____ 9.16 1869 ____9.06 2009 _____ -5.09 1830____-3.16 1954____ -2.94 1799

07 Feb ___10.26 2004____ 9.31 1869 ____8.79 2009 _____ -3.73 1830____-3.34 1841____ -3.23 1917

08 Feb ___ 9.64 2004____ 9.51 1869 ____8.51 1966 _____ -3.86 1895____-3.70 1917____ -3.44 1799

09 Feb ___ 9.81 1869____ 8.83 1933 ____8.40 1903 _____ -4.97 1895____-3.90 1917____ -3.17 1841

10 Feb ___ 9.83 1869____ 9.14 1933 ____9.03 1903 _____ -5.71 1895____-3.97 1917____ -2.63 1991

11 Feb ___ 9.49 1869____ 9.36 1903 ____8.79 1918 _____ -6.23 1895____-3.81 1917____ -2.53 1991

12 Feb ___ 9.34 1903____ 8.99 1939 ____8.93 1918 _____ -6.29 1895____-3.29 1855____ -3.11 1917

13 Feb ___ 9.09 1918____ 8.99 1831 ____8.93 1903 _____ -5.97 1895____-3.79 1855____ -3.29 1816

14 Feb ___ 9.53 1998____ 9.16 1899 ____8.81 1961 _____ -5.71 1895____-4.27 1855____ -3.09 1816

15 Feb ___10.03 1998____8.87 1899 ____8.84 1961 _____ -5.10 1895____-4.31 1855____ -3.16 1985

16 Feb ___10.37 1998____8.87 1961 ____8.26 1869 _____ -4.46 1855____-4.17 1895____ -4.09 1929

17 Feb ___10.16 1998____8.46 1779 ____8.84 1961 _____ -5.24 1929____-5.03 1855____ -3.64 1895

18 Feb ___ 9.61 1998 ____ 8.64 1779 ____8.84 1961 _____ -5.56 1929____-5.16 1855____ -3.39 1895

19 Feb ___ 9.07 1998 ____ 8.83 1779 ____8.84 1961 _____ -5.09 1929____-5.03 1855____ -2.61 1895

20 Feb ___ 8.86 1998 ____ 8.54 1779 ____8.43 1935 _____ -4.96 1855____-3.97 1929____ -2.21 1947

21 Feb ___ 8.70 1998 ____ 8.57 2017 ____8.49 2019 _____ -4.49 1855____-2.46 1929____ -2.41 1947

22 Feb ___ 9.01 2017 ____ 8.81 2019 ____8.43 1876 _____ -4.33 1855____-2.63 1947____ -2.13 1795

23 Feb ___ 9.23 2019 ____ 9.04 2017 ____ 8.86 1990 _____ -3.34 1855____-2.69 1947____ -2.04 1955

24 Feb ___ 9.53 1990 ____ 9.17 2019 ____ 8.67 1953 _____ -3.20 1947____-2.17 1956____ -1.90 1955

25 Feb ___ 9.67 1990 ____ 9.33 2019 ____ 9.21 1926 _____ -3.51 1947____-2.30 1956____ -2.09 1986

26 Feb ___ 9.77 2019 ____ 9.63 1846 ____ 9.49 1990 _____ -3.50 1947____-2.43 1986____ -2.16 1956

27 Feb ___10.07 1846____ 9.73 2019 ____ 9.53 1926 _____ -3.13 1947____-2.29 1986____ -1.63 1814

28 Feb ___10.39 1846____ 9.24 1926 ____ 9.13 2019 _____ -2.70 1947____-1.63 1986____ -1.41 1955

29 Feb ___ 8.86 2012 ____ 8.64 1912 ____8.56 1976 _____ -0.50 1888____ 1.23 1904____ 1.36 1968

_____________________________________________________________________________

The two last entries for coldest week are both in italics as technically 23-29 Feb has the least extreme value but

the sample size for leap years is small so the least extreme value from 22-28 Feb is also highlighted. 

10.53 23 Feb to 01 Mar 1846 will appear in the next post as warmest week that includes any February days. 

Hoping to post one of these every 2-3 days (each with two months of data) until we have the whole year covered. 

Edited by Roger J Smith
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Warmest and coldest weeks (continued -- March/April)

 These are the three warmest and coldest weeks (ending on dates shown in table) in the period of record 1772 to 2018. For the first six entries here (1 to 6 March) the start date of the weeks can be different depending on whether the year is a leap year or a non-leap year. After 7 March, the starting date is defined as six days previous. See the previous post for explanation of colour codes and italic entries. 

^ Note on 1777: Despite several consecutive records, the highest rank achieved was 7th for 22-28 March.

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 Mar ___10.53 1846____ 9.19 1830 ____8.96 1926 _____ -2.59 1947____-1.29 1986____ -0.86 1955 

02 Mar ___10.29 1846____ 9.40 1959 ____9.13 1830 _____ -2.24 1947____-1.09 2018____ -0.91 1986 

03 Mar ___10.16 1846____ 9.50 1959&1960 ____________ -1.64 1947____-1.34 2018____ -0.86 1929 

04 Mar ___ 9.83 1846 ____ 9.44 1960 ____9.39 1834 _____ -1.11 1947____-1.07 2018____ -0.77 1786 

05 Mar ___10.06 1834____ 9.53 1846 ____9.29 1959 _____ -1.19 1786____-1.01 1947____ -0.96 1909 

06 Mar ___10.07 1834____ 9.37 1872 ____9.36 1859 _____ -1.61 1786____-1.21 1909____ -1.20 1947 

07 Mar ___ 9.74 1834 ____ 9.53 1859 ____9.29 1872 _____ -1.70 1786&1947 ___________ -0.97 1965 

08 Mar ___ 9.67 1834 ____ 9.04 1872 ____8.87 1952 _____ -1.99 1786____-1.60 1947____ -0.63 1965 

09 Mar ___ 9.74 1834 ____ 9.11 1952 ____9.10 1798 _____ -2.11 1786____-1.16 1947____ -0.19 1970 

10 Mar ___ 9.73 1834 ____ 9.36 1826 ____9.00 2000 _____ -2.03 1786____-0.69 1947____ -0.40 1839 

11 Mar ___ 9.86 2000 ____ 9.50 1957 ____9.36 1834 _____ -1.27 1786____-0.57 1839____ -0.31 1947 

12 Mar ___10.69 1957____10.13 2000___ 10.07 1981 _____ -0.34 1886____-0.29 1786 &1892 

13 Mar ___11.23 1957____10.33 2000___ 10.19 1981 _____ -0.60 1785____-0.34 1788 & 1883 

14 Mar ___11.17 1957___ 10.47 1948 ___ 10.14 2000 _____ -0.83 1785____-0.71 1845____ -0.07 1892 

15 Mar ___11.34 1957___ 10.21 1948 ____9.83 1828 _____ -1.00 1845____-0.23 1785____ 0.06 1814 

16 Mar ___11.40 1957___ 10.24 1961 ___ 10.14 1828 _____ -1.76 1845____ 0.03 1772____ 0.07 1886 

17 Mar ___11.41 1957___ 10.44 1961 ___ 10.36 1828 _____ -2.49 1845____-0.04 1772____ 0.10 1887 

18 Mar ___10.91 1957___ 10.47 1828 ___10.27 1884 _____ -2.41 1845____-0.40 1887____ 0.10 1867 

19 Mar ___10.89 1884___ 10.43 1957 ___ 10.39 1990 _____ -2.19 1845____-0.51 1887____ -0.01 1814 

20 Mar ___10.86 1884___ 10.46 1990 ___ 10.13 1957 _____ -1.49 1845____-0.26 1887____ 0.13 1814 

21 Mar ___10.87 2005___ 10.86 1990 ___ 10.41 1938 _____ -0.59 1845____ 0.10 1887____ 0.31 1867 

22 Mar ___11.40 2005___ 10.80 1990 ___ 10.43 1938 _____ 0.53 1845____ 0.77 1853____ 0.87 1837&1887 

23 Mar ___11.41 2005___ 10.51 1990 ___ 10.31 1927 _____ 0.34 1853____ 0.41 1837____ 0.83 1876 

24 Mar ___11.31 2005___ 10.19 1927 ____9.89 1990 _____ 0.03 1837____ 0.27 1899____ 0.47 1853 

25 Mar ___11.24 2005___ 10.31 1886 ___ 10.19 1945 _____ 0.00 1837____ 0.19 1899____ 0.47 1853 

26 Mar ___11.00 2005___ 10.79 1886 ___ 10.36 2012 _____ 0.01 1837____ 0.43 1853____ 0.93 1883 

27 Mar ___10.94 1886___ 10.67 2012 ___ 10.61 2005 _____ 0.31 1837____ 0.69 1853____ 0.87 1883 

28 Mar^___10.93 2012___ 10.81 1886 ___ 10.49 2005 _____ 0.73 1785____ 0.89 1879____ 0.91 1853 

29 Mar ___10.99 2012___ 10.63 1886 ___ 10.51 1803 _____ 0.63 1785____ 0.77 2013____ 1.09 1853 

30 Mar ___10.73 2012___ 10.37 1803 ___ 10.19 1998 _____ 0.64 1785____ 0.94 2013____ 1.37 1784 

31 Mar ___10.71 1998___ 10.66 1803 ___ 10.60 2006 _____ 0.71 1785____ 1.09 2013____ 1.43 1784 

01 Apr ___10.94 2017___ 10.90 1998 ___ 10.77 1803 _____ 0.91 1785____ 1.24 1784 & 2013 

02 Apr ___11.01 2017___ 10.91 1938 ___ 10.86 1998 _____ 0.86 1785____ 1.19 1784____ 1.49 2013 

03 Apr ___11.39 1946___ 11.21 2017 ___ 11.09 1848 _____ 0.71 1785____ 1.16 1799____ 1.46 1784 

04 Apr ___12.39 1946___ 11.76 1848 ___11.39 1999&2017 _0.77 1799____ 1.53 1785____ 1.94 1784 

05 Apr ___12.13 1848___ 12.06 1946 ___ 11.70 1999 _____ 1.16 1799____ 1.70 1917____ 2.26 1922 

06 Apr ___12.04 1999___ 11.73 1926 ___ 11.61 2011 _____ 1.49 1917____ 1.84 1799____ 2.54 1922 

07 Apr ___12.60 1926___ 11.64 2011 ___ 11.56 1999 _____ 1.73 1917____ 2.10 1839____ 2.30 1799 

08 Apr ___12.44 1926___ 11.46 2011 ___11.26 1859 _____ 1.80 1839____ 2.36 1917____ 2.74 1799 

09 Apr ___11.80 1926___ 11.51 1859 ___11.39 2011 _____ 1.79 1839____ 2.71 1888____ 2.91 1917 

10 Apr ___11.80 2011___ 11.53 1999 ___11.37 1798 _____ 2.31 1839____ 2.56 1837____ 2.86 1888 

11 Apr ___12.23 2011___ 11.63 1798 ___11.24 1865 _____ 2.26 1837____ 2.93 1839____ 3.00 1917 

12 Apr ___11.79 1778 & 2011 _________11.63 1798 _____ 2.16 1837____ 3.03 1917____ 3.49 1839 

13 Apr ___12.16 1778___ 12.13 1869 ___11.73 1798_____ 2.01 1837____ 3.19 1917____ 3.67 1784 

14 Apr ___12.81 1869___ 11.94 1792 ___11.59 1798 _____ 2.00 1837____ 3.16 1812____ 3.37 1917 

15 Apr ___12.84 1869___ 12.16 1792 ___12.01 2007 _____ 2.31 1837____ 3.24 1879____ 3.30 1812 

16 Apr ___13.31 1945___ 12.93 1869 ___12.66 2007 _____ 2.39 1837____ 2.87 1879____ 3.47 1917 

17 Apr ___13.97 1945___ 13.46 1949 ___12.54 1943 _____ 2.99 1837____ 3.04 1879____ 3.24 1966 

18 Apr ___14.17 1945___ 13.80 1949 ___12.86 2003 _____ 2.40 1892____ 3.04 1966____ 3.20 1879 

19 Apr ___14.37 1945___ 13.46 1949 ___13.06 2003 _____ 2.34 1892____ 3.01 1966____3.73 1812&1879 

20 Apr ___14.79 1945___ 13.63 2018 ___12.97 2003 _____ 3.06 1892____ 3.27 1966____ 3.80 1859 

21 Apr ___14.57 1945___ 14.01 2018 ___12.61 2003 _____ 3.49 1849____ 3.64 1859____ 3.66 1807 

22 Apr ___14.54 2018___ 13.40 1945 ___12.96 2011 _____ 3.33 1838____ 3.56 1849____ 3.61 1807 

23 Apr ___14.47 2018___ 13.63 2011 ___13.33 1893 _____ 3.64 1849____ 4.01 1838____ 4.13 1808 

24 Apr ___14.27 1893___ 14.24 2018 ___13.99 2011 _____ 3.80 1908____ 4.09 1808____ 4.39 1838 

25 Apr ___14.70 1893___ 14.17 2011 ___13.33 1901 _____ 3.30 1908____ 4.01 1808____ 4.66 1860 

26 Apr ___14.41 1893___ 13.73 2011 ___13.34 1901 _____ 3.31 1908____ 4.30 1808____ 4.50 1981 

27 Apr ___14.04 1874___ 14.01 1794 ___13.73 1893 _____ 3.50 1908____ 4.37 1808____ 4.39 1981 

28 Apr ___14.22 1840___ 14.01 1794 ___13.60 1821 _____ 3.86 1908____ 4.40 1808____ 4.44 1981 

29 Apr ___14.29 1840___ 13.91 1794 ___13.77 1775&1821_4.23 1857____ 4.47 1808____ 4.51 1908 

30 Apr ___15.06 1775___ 14.49 1840 ___13.94 1807 _____ 4.47 1808____ 4.54 1857____ 4.96 1782&1906

_________________________________________

as shown in the next table to be posted, warmest weeks with any April days involved end 2 and 4 May (15.80).

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Warmest and coldest weeks (continued -- May/June)

 These are the three warmest and coldest weeks (ending on dates shown in table) in the period of record 1772 to 2018. See the first post in the series for explanation of colour codes and italic entries. Weeks end on the dates shown, e.g., 1 May refers to the weekly interval 25 April to 1 May.

 

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 May ___ 15.37 1775 ___ 14.43 1807 ___ 14.04 1840 ____ 4.27 1782 ___ 4.76 1857 ___ 5.07 1826

02 May ___ 15.80 1775 ___ 14.96 1807 ___ 13.57 1840 ____ 4.17 1782 ___ 4.90 1857 ___ 5.13 1906

03 May ___ 15.77 1775 ___ 15.09 1807 ___ 13.30 1804 ____ 4.21 1782 ___ 4.69 1856 ___ 4.83 1945

04 May ___ 15.80 1775 ___ 14.59 1990 ___ 14.13 1840 ____ 4.01 1782 ___ 4.57 1945 ___ 4.67 1856

05 May ___ 15.57 1775 ___ 15.54 1990 ___ 14.51 1804 ____ 4.44 1782 ___ 4.56 1877 ___ 4.57 1856

06 May ___ 15.71 1990 ___ 14.89 1804 ___ 14.66 1995 ____ 4.60 1877 ___ 4.71 1782 ___ 4.84 1979

07 May ___ 15.16 1990 ___ 15.14 1995 ___ 14.84 1804 ____ 5.06 1877 ___ 5.09 1782 & 1979

08 May ___ 15.14 1995 ___ 14.91 1800 ___ 14.76 1867 ____ 5.34 1782 ___ 5.74 1856 __5.91 1877&1979

09 May ___ 15.53 2008 ___ 15.30 1800 ___ 15.17 1867 ____ 5.77 1782 ___ 6.13 1861 ___ 6.19 1856

10 May ___ 16.19 2008 ___ 15.56 1867 ___ 15.30 1834 ____ 5.90 1861 ___ 6.20 1902 ___ 6.23 1941

11 May ___ 16.66 2008 ___ 15.46 1867 ___ 15.29 2016 ____ 6.03 1861 ___ 6.16 1902 ___ 6.31 1879

12 May ___ 16.80 2008 ___ 15.90 2016 ___ 15.81 1945 ____ 6.10 1861 ___ 6.33 1902 ___ 6.49 1879

13 May ___ 16.64 2008 ___ 16.46 1945 ___ 16.01 1959 ____ 6.11 1861 ___ 6.41 1902 ___ 6.77 1879

14 May ___ 16.61 1959 ___ 16.09 2008 ___ 15.97 1945 ____ 6.36 1902 ___ 6.60 1816 ___ 7.09 1885

15 May ___ 16.63 1959 ___ 16.46 1833 ___ 15.53 1848 ____ 6.31 1902 ___ 6.53 1839 ___ 6.76 1816

16 May ___ 16.64 1833 ___ 16.39 1959 ___ 15.94 1848 ____ 6.29 1839 ___ 6.50 1923 ___ 6.69 1902

17 May ___ 17.40 1833 ___ 16.33 1848 ___ 15.97 1808 ____ 6.39 1839 ___ 6.54 1923 ___ 6.96 1935

18 May ___ 17.54 1833 ___ 16.30 1809 ___ 16.04 1808 ____ 5.99 1935 ___ 6.56 1923 ___ 6.89 1855

19 May ___ 17.09 1833 ___ 16.33 1809 ___ 16.31 1952 ____ 5.53 1935 ___ 6.56 1802 ___ 7.07 1923

20 May ___ 17.04 1833 ___ 16.80 1864 ___ 16.67 1952 ____ 5.89 1935 ___ 6.53 1802 ___ 6.70 1955

21 May ___ 16.04 1833 ___ 16.57 1952 ___ 16.49 1864 ____ 6.17 1891 ___ 6.27 1935 ___ 6.59 1955

22 May ___ 16.76 1918 ___ 16.44 1833 ___ 16.19 1864 ____ 6.16 1891 ___ 6.30 1935 ___ 6.80 1955

23 May ___ 16.51 1918 ___ 16.34 1989 ___ 16.16 1834 ____ 6.69 1891 ___ 7.03 1935 ___ 7.29 1872

24 May ___ 17.18 1989 ___ 16.31 1922 ___ 16.27 1992 ____ 7.27 1891 ___ 7.46 1837 ___ 7.56 1872

25 May ___ 17.01 1922 ___ 16.86 1992 ___ 16.80 1989 ____ 7.63 1917 ___ 7.71 1891 ___ 7.86 1821

26 May ___ 17.33 1922 ___ 17.16 1992 ___ 17.40 1788 ____ 7.06 1821 ___ 7.97 1891 ___ 8.04 1917

27 May ___ 17.96 1788 ___ 17.11 1922 ___ 17.03 1992 ____ 6.89 1821 ___ 8.16 1867 ___ 8.23 1891

28 May ___ 17.09 1788 ___ 17.36 1992 ___ 17.27 2012 ____ 6.74 1821 ___ 8.40 1814 ___ 8.41 1923

29 May ___ 17.41 2012 ___ 17.17 1992 ___ 16.29 1788 ____ 6.91 1821 ___ 8.10 1923 ___ 8.40 1783

30 May ___ 17.41 2012 ___ 17.03 2017 ___ 16.99 1992 ____ 7.34 1821 ___ 8.19 1923 ___ 8.63 1783

31 May ___ 17.63 1947 ___ 17.37 1944 ___ 16.89 2012 ____ 8.00 1821 ___ 8.39 1923 ___ 8.59 1795

01 Jun ___ 18.49 1947 ___ 17.80 1944 ___ 17.07 1911 ____ 8.59 1923 ___ 8.67 1962 ___ 8.69 1894

02 Jun ___ 19.36 1947 ___ 17.57 1781 ___ 17.43 1944 ____ 9.04 1962 ___ 9.16 1923 ___ 9.26 1783

03 Jun ___ 20.53 1947 ___ 18.03 1781 ___ 17.66 1978 ____ 8.67 1936 ___ 8.89 1975 ___ 9.29 1855

04 Jun ___ 20.83 1947 ___ 18.18 1781 ___ 18.06 1978 ____ 8.34 1975 ___ 8.74 1936 ___ 9.47 1991

05 Jun ___ 19.74 1947 ___ 18.59 1982 ___ 18.07 1781 ____ 9.09 1975 ___ 9.16 1991 ___ 9.20 1936

06 Jun ___ 19.16 1982 ___ 18.47 1947 ___ 18.27 1822 ____ 9.11 1989 ___ 9.27 1936 ___ 9.36 1991

07 Jun ___ 19.19 1982 ___ 18.91 1950 ___ 18.70 1933 ____ 9.51 1989 ___ 9.53 1991 ___ 9.91 1814

08 Jun ___ 19.26 1933 ___ 19.11 1982 ___ 18.77 1950 ____ 9.60 1991 ___ 9.69 1871 ___ 9.71 1989

09 Jun ___ 19.20 1982 ___ 19.09 1933 _ 19.06 1846&1940_ 10.03 1814 & 1916 _______10.09 1909

10 Jun ___ 19.09 1940 ___ 19.00 1846 ___ 18.71 1822 ____ 9.66 1816 ___10.20 1916___10.23 1814

11 Jun ___ 19.03 1846 ___ 18.97 1940 & 1970 ___________ 9.31 1816 ___10.13 1881 ___10.17 1909

12 Jun ___ 19.41 1970 ___ 19.09 1846 ___ 18.57 1940 ____ 9.66 1816 ___ 9.99 1841&1881

13 Jun ___ 19.56 1970 ___ 18.87 1846 ___ 18.66 2006 ____ 9.76 1841 ___10.04 1902___10.24 1916

14 Jun ___ 18.79 1970 ___ 18.46 1846 ___ 18.23 2006 ____ 9.97 1821 ___10.19 1902___10.44 1841

15 Jun ___ 18.84 1846 ___ 18.54 1858 ___ 18.51 1826 ____10.17 1821___10.20 1902___10.53 1942

16 Jun ___ 19.19 1846 ___ 18.81 1858 ___ 18.39 1896 ____10.51 1821___10.54 1902___10.67 1981

17 Jun ___ 19.54 1846 ___ 18.57 1896 ___ 18.33 1917 ____10.37 1892___10.41 1903___10.57 1791

18 Jun ___ 19.79 1846 ___ 18.79 1989 ___ 18.46 1917 ____ 9.83 1892___10.26 1903___10.67 1791

19 Jun ___ 19.91 1846 ___ 18.88 1893 ___ 18.70 1989 ____ 9.94 1892 ___10.01 1903___11.01 1956

20 Jun ___ 20.26 1846 ___ 18.89 2017 ___ 18.80 1893 ____10.03 1903 ___10.19 1892___10.86 1869

21 Jun ___ 20.16 1846 ___ 19.53 2017 ___ 18.61 1893 ____10.30 1903 ___10.71 1892___10.76 1855

22 Jun ___ 20.39 1846 ___ 19.83 2017 ___ 18.90 1941 ____10.53 1903___10.66 1855___11.01 1813 

23 Jun ___ 19.70 2017 ___ 19.66 1846 ___ 19.36 1941 ____10.61 1903___10.84 1813__10.90 1823

24 Jun ___ 19.83 1817 ___ 19.37 2017 ___ 19.31 1941 ____10.61 1823___11.01 1813___11.26 1903

25 Jun ___ 19.79 1817 ___ 19.21 1941 ___ 19.06 1935 ____11.10 1823___11.31 1814___11.46 1821

26 Jun ___ 19.70 1935 ___ 19.44 1817 ___ 18.99 1941 ____10.84 1814___11.46 1821___11.54 1823

27 Jun ___ 19.80 1935 ___ 19.71 1976 ___ 19.24 1878 ____10.80 1814___11.61 1823___11.73 1821

28 Jun ___ 20.94 1976 ___ 20.11 1878 ___ 19.50 1935 ____11.16 1814 ___11.54 1835 ___11.83 1812

29 Jun ___ 21.53 1976 ___ 20.44 1878 ___ 19.64 1820 ____10.97 1835 ___11.76 1814 ___11.81 1909

30 Jun ___ 21.73 1976 ___ 20.16 1878 ___ 20.09 1826 ____11.30 1835 ___11.84 1907 ___11.93 1909

______________________________________________________________

In the next post, the warmest week that includes any days from June will be shown as 23.47 (30 June to 6 July 1976). 

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Warmest and coldest weeks (continued -- July/August)

 These are the three warmest and coldest weeks (ending on dates shown in table) in the period of record 1772 to 2018. See the first post in the series for explanation of colour codes and italic entries. Weeks end on the dates shown, e.g., 1 July refers to the weekly interval 25 April to 1 July.

Note: July 2013 did not quite make the table, 19 to 25 July ranked 4th.

 

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 Jul ___ 22.26 1976 ___ 20.47 1826 ___ 19.57 1878 ____ 11.64 1919 ___11.80 1907___11.99 1909

02 Jul ___ 22.51 1976 ___ 20.66 1826 ___ 20.10 2009 ____ 11.64 1919 ___11.99 1907___12.26 1839

03 Jul ___ 22.84 1976 ___ 20.61 1826 ___ 20.39 2009 ____ 11.41 1907 ___11.93 1919___12.10 1839

04 Jul ___ 23.16 1976 ___ 20.47 1826 ___ 20.21 2009 ____ 11.19 1907 ___12.06 1919___12.49 1954

05 Jul ___ 23.34 1976 ___ 20.31 1826 ___ 20.29 2006 ____ 11.21 1907 ___11.87 1919___12.30 1813

06 Jul ___ 23.47 1976 ___ 20.64 2006 ___ 20.47 1826 ____ 11.41 1907 ___11.99 1919___12.01 1813

07 Jul ___ 23.54 1976 ___ 20.51 2006 ___ 20.37 1826 ____ 11.60 1907 ___12.27 1919___12.39 1954

08 Jul ___ 23.33 1976 ___ 20.36 1826 ___ 20.17 1852 ____ 11.67 1907 ___12.39 1879___12.41 1954

09 Jul ___ 22.84 1976 ___ 20.94 1852 ___ 20.39 1826 ____ 11.81 1907 ___12.31 1879___12.40 1965

10 Jul ___ 21.79 1976 ___ 21.29 1852 ___ 20.10 1826 ____ 12.01 1907 ___12.40 1879___12.53 1890

11 Jul ___ 21.00 1852 ___ 20.97 1976 ___ 20.39 1923 ____ 11.90 1907 ___12.17 1888___12.31 1879

12 Jul ___ 21.17 1923 ___ 20.63 1983 ___ 20.50 1976 ____ 11.80 1888 ___11.86 1907___12.17 1879

13 Jul ___ 21.53 1923 ___ 21.11 1983 ___ 20.37 1941 ____ 11.93 1888 ___11.99 1907___12.21 1840

14 Jul ___ 21.46 1983 ___ 20.99 1923 ___ 20.27 1808 ____ 12.27 1840 & 1879 ________ 12.47 1888

15 Jul ___ 21.76 1983 ___ 20.87 1923 ___ 20.67 1808 ____ 12.44 1879 ___12.49 1840___12.53 1888

16 Jul ___ 22.03 1983 ___ 21.36 1808 ___ 20.73 1923 ____ 12.64 1879 ___12.67 1888___12.89 1840

17 Jul ___ 22.16 1983 ___ 21.83 1808 ___ 20.40 1825 ____ 12.90 1980 ___12.91 1879___12.94 1841

18 Jul ___ 22.20 1808 ___ 21.90 1983 ___ 21.19 1825 ____ 12.57 1892 ___13.03 1802___13.06 1980

19 Jul ___ 22.10 1808 ___ 21.80 1825 ___ 21.21 1983 ____ 12.29 1892 ___12.86 1823___12.89 1883

20 Jul ___ 21.81 1825 ___ 21.21 1808 ___ 20.66 1921 ____ 12.46 1892 ___12.47 1883___13.09 1817

21 Jul ___ 21.31 1825 ___ 21.17 2006 ___ 20.34 1921 ____ 12.36 1883 ___12.49 1892___12.73 1836

22 Jul ___ 21.87 2006 ___ 20.53 1868 ___ 20.46 1878 ____ 12.57 1883 ___12.60 1892___12.70 1836

23 Jul ___ 21.91 2006 ___ 20.60 1989 ___ 20.54 1878 ____ 12.36 1836 ___12.61 1863___12.63 1883

24 Jul ___ 21.79 2006 ___ 21.04 1989 ___ 20.31 1878 ____ 12.20 1836 ___12.57 1902___12.59 1883

25 Jul ___ 21.87 2006 ___ 21.51 1989 ___ 20.64 1900 ____ 12.11 1836 ___12.60 1883___12.61 1843

26 Jul ___ 21.69 2006 ___ 21.60 1989 ___ 20.49 1900 ____ 12.59 1836 ___12.71 1883___13.13 1843

27 Jul ___ 21.47 2006 ___ 21.09 1989 __ 20.20 1818&1949_12.97 1883 ___13.20 1860___13.36 1843

28 Jul ___ 21.20 2006 ___ 20.44 1989 ___ 20.14 1949 ____ 12.89 1920 ___13.06 1860___13.23 1867

29 Jul ___ 20.86 2006 ___ 20.13 1948 ___ 19.77 1900 ____ 12.71 1845 ___12.73 1867___12.76 1920

30 Jul ___ 21.46 1948 ___ 20.77 2006 ___ 20.24 1995 ____ 12.74 1867 ___12.79 1845___12.93 1920

31 Jul ___ 21.93 1948 ___ 20.91 1995 ___ 20.53 1911 ____ 12.80 1845 ___13.00 1816___13.07 1867

01 Aug___ 21.80 1948 ___ 21.54 1995 ___ 20.54 1911 ____ 12.73 1867 ___12.81 1845__13.01 1816 & 1888

02 Aug___ 22.13 1995 ___ 21.39 1948 ___ 20.56 1911 ____ 12.67 1845 ___12.81 1841___12.83 1888

03 Aug___ 22.69 1995 ___ 20.46 1948 ___ 20.43 1911 ____ 12.74 1912 ___12.79 1888___12.81 1816

04 Aug___ 22.73 1995 ___ 20.66 1990 ___ 20.46 1975 ____ 12.73 1912 ___12.77 1888___12.80 1786

05 Aug___ 22.30 1995 ___ 20.71 1975 ___ 20.70 1990 ____ 12.77 1812 ___12.81 1888 & 1912

06 Aug___ 21.84 1995 ___ 20.87 1975 ___ 20.17 1990 ____ 12.77 1888 ___12.79 1912___12.86 1812

07 Aug___ 21.46 1975 ___ 20.94 1995 ___ 20.23 1933 ____ 12.64 1812 ___13.07 1912___13.27 1956

08 Aug___ 22.09 1975 ___ 20.49 1933 ___ 20.33 2003 ____ 12.61 1812 ___13.07 1823___13.20 1912

09 Aug___ 22.26 1975 ___ 21.44 2003 ___ 20.54 1933 ____ 12.34 1812 ___12.79 1823___13.09 1962

10 Aug___ 22.14 2003 ___ 21.71 1975 ___ 20.27 1997 ____ 12.03 1812 ___12.49 1823___12.94 1913

11 Aug___ 22.27 2003 ___ 21.14 1997 ___ 21.10 1975 ____ 12.30 1812 ___12.86 1823___12.97 1987

12 Aug___ 22.03 2003 ___ 21.70 1997 ___ 20.77 1975 ____ 12.50 1812 ___12.71 1912___12.87 1922

13 Aug___ 21.77 1997 ___ 21.54 2003 ___ 20.84 1911 ____ 12.46 1912 ___12.67 1812___12.83 1922

14 Aug___ 21.41 1997 ___ 21.10 1911 ___ 20.90 2003 ____ 12.06 1912 ___12.74 1922___12.77 1812

15 Aug___ 21.01 1997 ___ 20.73 1911 ___ 20.36 1893 ____ 11.91 1912 ___12.59 1922___12.99 1881

16 Aug___ 20.81 1997 ___ 20.36 1893 ___ 19.77 1995 ____ 11.94 1912 ___12.67 1845___12.74 1922

17 Aug___ 20.66 1893 ___ 20.54 1876 & 1997 ___________ 12.17 1912 ___12.50 1845___12.97 1881

18 Aug___ 21.26 1893 ___ 20.54 1876 ___ 20.46 1947 ____ 12.20 1830 ___12.43 1845___12.44 1912

19 Aug___ 21.17 1893 ___ 20.86 1947 ___ 20.40 1876 ____ 11.60 1830 ___12.01 1888___12.43 1845

20 Aug___ 20.94 1893 ___ 20.90 1947 ___ 20.56 1995 ____ 11.49 1830 ___11.86 1888___12.41 1845

21 Aug___ 21.06 1995 ___ 21.01 1947 ___ 20.54 1893 ____ 11.50 1830 ___12.07 1845___12.23 1888

22 Aug___ 21.39 1995 ___ 20.96 1947 ___ 20.67 1997 ____ 11.69 1830 ___12.39 1845___12.54 1810

23 Aug___ 21.11 1995 ___ 20.60 1947 ___ 20.59 1997 ____ 12.04 1830 ___12.24 1864___12.30 1920

24 Aug___ 20.53 1995 ___ 20.49 1955 ___ 20.20 1997 ____ 11.73 1864 ___11.91 1920___12.49 2014

25 Aug___ 20.70 1955 ___ 20.20 1995 ___ 19.94 1959 ____ 11.50 1864 ___11.97 1920___12.01 1904

26 Aug___ 20.37 1955 ___ 19.90 1959 ___ 19.76 1976 ____ 10.76 1864 ___11.96 1817___12.27 1931

27 Aug___ 20.30 1955 ___ 19.34 1976 ___ 19.24 1984 ____ 11.17 1864 ___11.80 1817___12.10 1931

28 Aug___ 19.83 1955 ___ 19.63 1990 ___ 18.97 1976 ____ 11.89 1864 ___12.00 1931___12.01 1890

29 Aug___ 19.83 1990 ___ 19.23 1955 ___ 18.87 1942 ____ 11.71 1890 ___11.96 1864___11.99 1784

30 Aug___ 19.51 1930 ___ 19.07 1942 ___ 18.94 1990 ____ 11.07 1890 ___11.74 1784___12.00 1956

31 Aug___ 19.87 1930 ___ 19.23 1942 ___ 18.40 1779 ____ 10.86 1890 ___11.71 1784&1956

___________________________________________________________________

The next table will show that the coldest week including any days from August is 31 Aug to 06 Sep (8.89 in 1816).

 

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note: in the previous post, the sentence 1 July refers to (etc) should have had 25 June inserted in place of 25 April. Can't edit the post right now. 

Warmest and coldest weeks (continued -- September / October)

 These are the three warmest and coldest weeks (ending on dates shown in table) in the period of record 1772 to 2017. See the first post in the series for explanation of colour codes and italic entries. Weeks end on the dates shown, e.g., 1 October refers to the weekly interval 25 September to 1 October.

September managed to provide some unexpected outcomes. First, the month did not need any help from August to set a weekly maximum, so there's no red italic number in the period 1-6 September. The interval of 3 to 9 September, 2006 managed 19.96, higher than any value since 21-27 August 1955. The lowest weekly maximum (16.94) was rather early, 16 to 22 September, the eight possible intervals later in the month were all warmer and so were ten of the first weekly maxima (ending in) October. Also the coldest week was even earlier, 7.67 for 12 to 18 September. That was the coldest until 27 to 3 October. October was somewhat more as you might expect in all of those areas but had its own unexpected quirk (see note below the 31 October entry) in that it got no help from November in creating a coldest week that includes days from October.  

 

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 Sep ___ 19.89 1930 ___ 19.33 1942 ___ 18.91 1779 _____10.60 1890 ___11.50 1956___11.54 1885

02 Sep ___ 19.00 1930 ___ 18.99 1779 ___ 18.91 1942 _____10.91 1890 ___11.07 1816___11.30 1885

03 Sep ___ 19.11 1906 ___ 18.79 1984 ___ 18.76 1780 _____10.39 1816 ___11.49 1923___11.51 1890

04 Sep ___ 19.30 1906 ___ 18.70 1780 ___ 18.50 1824 _____ 9.84 1816 ___11.17 1837___11.37 1915

05 Sep ___ 19.24 1906 ___ 18.81 1880 ___ 18.64 1991 _____ 9.37 1816 ___10.74 1833___11.77 1908

06 Sep ___ 19.36 1906 ___ 18.50 1880 ___18.46 1991&2005_ 8.89 1816 ___10.67 1833___10.83 1847

07 Sep ___ 18.97 1906 ___ 18.39 1999 ___ 17.97 1880 _____ 9.11 1816 ___10.80 1847___10.89 1841

08 Sep ___ 19.20 1898 ___ 18.29 1795 ___ 18.23 1906 _____ 9.96 1816 ___10.64 1790___10.99 1847

09 Sep ___ 19.96 1898 ___ 18.39 1973 ___ 18.33 1795 _____10.40 1952 ___10.46 1790___10.71 1816

10 Sep ___ 19.56 1898 ___ 18.19 1795 ___ 18.10 1865 _____ 9.93 1952 ___10.23 1931___10.56 1850

11 Sep ___ 19.26 1898 ___ 18.31 1795 ___ 18.10 1865 _____ 9.83 1952 ___ 9.83 1931___10.64 1912

12 Sep ___ 18.57 1898 ___ 18.44 1865 ___ 18.11 1795 _____ 9.84 1931 ___10.11 1807___10.19 1952

13 Sep ___ 18.53 1865 ___ 17.70 1795 ___ 17.57 1898 _____ 9.30 1807 ___ 9.61 1931___10.29 1912

14 Sep ___ 18.44 1865 ___ 17.61 2016 ___ 17.46 1781 _____ 8.74 1807 ___ 9.87 1931___10.17 1986

15 Sep ___ 18.41 1865 ___ 17.86 2016 ___ 17.34 2006 _____ 8.70 1807 ___ 9.63 1986___ 9.80 1903

16 Sep ___ 18.57 1865 ___ 17.60 2016 ___ 17.50 2006 _____ 8.20 1807 ___ 9.11 1903___ 9.51 1986

17 Sep ___ 18.09 1865 ___ 17.57 2006 ___ 17.43 1804 _____ 7.91 1807 ___ 9.04 1903___ 9.39 1986

18 Sep ___ 17.67 1865 ___ 17.51 1884 ___ 17.31 1804 _____ 7.67 1807 ___ 9.19 1840___ 9.36 1986

19 Sep ___ 17.64 1884 ___ 17.09 1854 ___ 17.03 1804 _____ 7.74 1807 ___ 9.00 1840___ 9.13 1986

20 Sep ___ 17.53 1884 ___ 17.11 1898 ___ 17.10 1926 _____ 7.94 1807 ___ 8.73 1840___ 9.40 1986

21 Sep ___ 17.36 1884 ___ 16.94 2006 ___ 16.86 1926 _____ 8.50 1807 ___ 9.17 1840___ 9.51 1986

22 Sep ___ 16.94 2006 ___ 16.60 1884 ___ 16.50 1825 _____ 8.93 1807 ___ 9.04 1840___ 9.49 1952

23 Sep ___ 17.04 2006 ___ 15.97 1825 ___ 15.90 1989 _____ 8.99 1840 ___ 9.24 1889___ 9.46 1872

24 Sep ___ 17.19 2006 ___ 16.14 1956 ___ 15.96 1825 _____ 8.20 1872 ___ 9.09 1889___ 9.19 1840

25 Sep ___ 17.16 2006 ___ 16.57 1956 ___ 16.07 1825 _____ 7.87 1872 ___ 8.77 1889___ 9.01 1840

26 Sep ___ 17.30 2006 ___ 16.51 1956 ___ 15.99 1949 _____ 7.99 1872 ___ 8.67 1889___ 8.84 1877

27 Sep ___ 17.21 2006 ___ 16.47 1949 ___ 16.17 1956 _____ 8.76 1793 ___ 8.86 1872___ 8.93 1877

28 Sep ___ 17.00 1895 ___ 16.74 1949 ___ 16.54 2006 _____ 8.86 1885 ___ 9.11 1786 & 1877

29 Sep ___ 17.67 1895 ___ 16.70 1949 ___ 16.43 2006 _____ 8.59 1885 ___ 8.71 1786___ 9.13 1874

30 Sep ___ 18.01 1895 ___ 17.01 2011 ___ 16.37 1949 _____ 8.34 1885 ___ 8.61 1974___ 8.79 1786

01 Oct ___ 17.96 2011 ___ 17.67 1895 ___ 16.71 1985 _____ 8.14 1974 ___ 8.26 1885___ 8.31 1778

02 Oct ___ 18.31 2011 ___ 16.79 1985 ___ 16.56 1895 _____ 7.84 1974 ___ 7.86 1808___ 7.91 1785

03 Oct ___ 18.90 2011 ___ 17.01 1908 ___ 16.73 1985 _____ 7.46 1808 & 1823 ________ 7.70 1817

04 Oct ___ 18.77 2011 ___ 17.51 1908 ___ 16.54 1985 _____ 7.26 1817 ___ 7.30 1808___ 7.59 1823

05 Oct ___ 18.34 2011 ___ 17.34 1908 ___ 16.57 1959 _____ 6.70 1889 ___ 6.96 1817___ 7.63 1808

06 Oct ___ 17.17 2011 ___ 16.74 1959 ___ 16.49 1908 _____ 5.39 1888 ___ 6.59 1817___ 7.50 1782

07 Oct ___ 16.57 1959 ___ 16.09 1921 ___ 15.90 2011 _____ 4.99 1888 ___ 6.51 1817___ 7.30 1867

08 Oct ___ 16.79 1921 ___ 16.30 1959 ___ 15.26 1949 _____ 5.11 1888 ___ 6.60 1817___ 6.94 1912

09 Oct ___ 17.34 1921 ___ 15.94 1959 ___ 15.50 1949 _____ 5.64 1888 ___ 6.80 1867___ 6.89 1912

10 Oct ___ 17.51 1921 ___ 15.46 1959 ___ 15.24 1949 _____ 5.94 1888 ___ 6.63 1840___ 6.66 1814

11 Oct ___ 17.56 1921 ___ 15.06 1949 ___ 14.97 1969 _____ 6.41 1888 ___ 6.59 1814___ 6.70 1840

12 Oct ___ 17.04 1921 ___ 15.33 1995 ___ 15.13 1949 _____ 6.26 1852 ___ 6.40 1840___ 6.70 1814

13 Oct ___ 16.06 1921 ___ 15.60 1995 ___ 15.00 1949 _____ 6.34 1852 ___ 6.74 1840___ 6.87 1887

14 Oct ___ 15.44 1921 ___ 15.37 1995 ___ 14.76 1949 _____ 6.06 1887 ___ 6.31 1849___ 6.39 1919

15 Oct ___ 15.00 1995 ___ 14.90 1949 ___ 14.70 2001 _____ 5.39 1887 ___ 5.61 1919___ 6.10 1849

16 Oct ___ 14.90 1990 & 2017 __________ 14.89 1949 _____ 5.04 1887 ___ 5.40 1919___ 5.69 1843

17 Oct ___ 14.86 1990 ___ 14.67 2001 ___ 14.63 1995 _____ 4.91 1778 ___ 5.17 1843___ 5.19 1887

18 Oct ___ 14.80 1990 ___ 14.63 2001 ___ 14.47 1995 _____ 3.91 1843 ___ 4.54 1824___ 4.74 1778

19 Oct ___ 14.51 1990 ___ 14.46 1954 ___ 14.33 1818 _____ 3.17 1843 ___ 4.69 1778___ 4.93 1824

20 Oct ___ 14.10 1954 ___ 14.06 1818 ___ 13.97 1990 _____ 3.09 1843 ___ 4.69 1778___ 4.73 1905

21 Oct ___ 13.99 1811 ___ 13.91 2006 ___ 13.80 1954 _____ 3.29 1843 ___ 4.40 1905___ 4.86 1926

22 Oct ___ 13.94 1811 ___ 13.70 2006 ___ 13.54 1977 _____ 3.57 1905 ___ 4.29 1843___ 4.39 1926

23 Oct ___ 13.76 2013 ___ 13.66 1977 ___ 13.63 1811 _____ 3.60 1905 ___ 3.94 1926___ 4.84 1896

24 Oct ___ 13.70 1977 ___ 13.51 1826 ___ 13.50 2013 _____ 3.29 1926 ___ 3.90 1905___ 4.30 1842

25 Oct ___ 13.76 2013 ___ 13.57 1977 ___ 13.31 1826 _____ 3.50 1926 ___ 3.74 1880___ 3.80 1905

26 Oct ___ 13.69 2013 ___ 12.96 1996 ___ 12.93 1827 _____ 2.94 1859 ___ 3.57 1880___ 3.73 1905

27 Oct ___ 13.41 2013 ___ 12.87 1853 & 2005 ____________ 2.67 1859 ___ 3.09 1895___ 3.14 1931

28 Oct ___ 13.31 2005 ___ 13.10 2009 ___ 12.91 2013 _____ 2.24 1895 ___ 3.17 1931___ 3.47 1819

29 Oct ___ 13.60 2005 ___ 13.16 2009 ___ 12.59 2014 _____ 1.69 1895 ___ 3.46 1873___ 3.70 1819

30 Oct ___ 14.29 2005 ___ 13.21 2009 ___ 12.73 1927 _____ 1.57 1895 ___ 3.39 1873___ 4.21 1819

31 Oct ___ 14.20 2005 ___ 13.44 1927 ___ 13.20 2009 _____ 2.16 1895 ___ 3.41 1896___ 3.90 1922

____________________________________________________________________

October needed no help from November, or at least got no help, in creating the coldest week that includes days in October,

the value of 1.57 for 24-30 Oct remains intact through 6 November and in fact is the coldest until 7-13 November. 

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Warmest and coldest weeks (continued -- November / December)

 These are the three warmest and coldest weeks (ending on dates shown in table) in the period of record 1772 to 2017. See the first post in the series for explanation of colour codes and italic entries. Weeks end on the dates shown, e.g., 01 Dec refers to the weekly interval 25 November to 1 December.

 

WEEK ENDING / ___________ Highest values ___________ // ____________ Lowest values ___________

01 Nov ___ 13.93 2005 ___ 13.56 2014 ___ 13.27 2009 ______ 2.87 1895 ___ 3.36 1836___ 3.60 1896&1926

02 Nov ___ 13.80 2005 ___ 13.63 2014 ___ 12.73 1927 ______ 3.00 1836 ___ 3.37 1881___ 3.50 1926

03 Nov ___ 13.51 2005 ___ 12.86 2014 ___ 12.66 1927 ______ 3.07 1836 ___ 3.66 1881___ 3.81 1926

04 Nov ___ 12.74 2005 ___ 12.60 1927 ___ 12.56 2011 ______ 3.40 1880 ___ 3.64 1836___ 3.96 1813

05 Nov ___ 12.54 2011 ___ 12.01 2005 ___ 11.97 1927 ______ 3.53 1782 ___ 3.54 1880___ 3.74 1988

06 Nov ___ 11.97 1996 ___ 11.83 1818 ___ 11.77 2011 ______ 3.17 1782 ___ 3.66 1896___ 3.81 1810

07 Nov ___ 11.79 1938 ___ 11.66 1996 ___ 11.64 2015 ______ 2.41 1782 ___ 3.07 1791___ 3.51 1896

08 Nov ___ 12.13 1938 ___ 11.67 2015 ___ 11.23 1978 ______ 2.40 1782 ___ 2.86 1791___ 3.21 1896

09 Nov ___ 12.54 1938 ___ 11.96 2015 ___ 11.36 1955 ______ 2.17 1782 ___ 2.79 1896___ 3.20 1791

10 Nov ___ 12.59 1938 ___ 12.54 2015 ___ 11.77 1955 ______ 1.86 1782 ___ 2.71 1896___ 2.73 1812

11 Nov ___ 12.94 2015 ___ 12.44 1938 ___ 11.56 1955 ______ 1.97 1782 ___ 2.49 1812___ 2.91 1923

12 Nov ___ 12.71 2015 ___ 12.21 1938 ___ 11.16 1955 ______ 1.91 1921 ___ 2.19 1782___ 2.20 1812

13 Nov ___ 12.43 1938 ___ 11.81 2015 ___ 11.26 1881 ______ 1.03 1921 ___ 1.83 1929___ 2.43 1782

14 Nov ___ 12.57 1938 ___ 11.54 1881 ___ 11.26 2015 ______ 1.06 1929 ___ 1.31 1921___ 1.37 1925

15 Nov ___ 12.20 1938 ___ 11.36 1881 ___ 11.27 2015 ______ 0.60 1929 ___ 0.83 1925___ 1.63 1921

16 Nov ___ 11.99 1938 ___ 11.20 1881 ___ 11.14 2015 ______ 0.10 1929 ___ 0.81 1925___ 1.61 1786

17 Nov ___ 11.99 1938 ___ 11.51 1990 ___ 11.10 1821 ______ 0.51 1929 ___ 1.23 1925___ 1.50 1862

18 Nov ___ 11.56 1938 ___ 11.31 1990 ___ 10.80 1948 ______ 0.97 1861 ___ 1.36 1929___ 1.49 1841

19 Nov ___ 11.29 1948 ___ 10.94 1994 ___ 10.76 1978 ______ 0.97 1861 ___ 1.17 1841___ 1.20 1815

20 Nov ___ 11.19 1994 ___ 11.03 1948 ___ 10.80 2009 ______ 0.36 1815 ___ 0.74 1887___ 1.60 1915

21 Nov ___ 10.84 2009 ___ 10.71 1980&1997 ______________ 0.19 1887 ___ 0.26 1815___ 1.23 1915

22 Nov ___ 10.97 1980 ___ 10.73 2009 ___ 10.33 1994 ______ 0.00 1815 ___ 0.36 1887___ 0.79 1798

23 Nov ___ 11.01 1980 ___ 10.69 2009 ___ 10.67 1978&1994__-0.19 1815 ___-0.03 1858__ 0.83 1798&1993

24 Nov ___ 11.14 1980 ___ 10.93 1994 ___ 10.74 2009 ______ 0.03 1858 ___ 0.13 1815___ 0.37 1993

25 Nov ___ 11.04 1980 ___ 10.83 1994 ___ 10.37 2009 ______ 0.41 1815 ___ 0.57 1993___ 0.59 1773

26 Nov ___ 10.66 1994 ___ 10.29 1980 ___ 10.19 1959 ______ 0.07 1904 ___ 0.23 1782___ 0.63 1923

27 Nov ___ 10.31 1994 ___ 10.07 1835 ____ 9.54 1959 ______-0.94 1904 ___-0.31 1782___ 0.13 1923

28 Nov ___ 10.01 1994 ____ 9.66 1835 ____ 9.44 1906 ______-1.27 1904 ___-0.24 1782___-0.21 1923

29 Nov ___ 10.11 1818 ____ 9.66 1828 ____ 9.56 2006 ______-1.03 1904 ___-0.30 1923___-0.23 2010

30 Nov ___ 10.26 1818 ____ 9.93 1828 ____ 9.69 2006 ______-1.10 2010 ___-0.43 1787___-0.29 1923

01 Dec ___ 10.10 1818 ____ 9.94 1979 ____ 9.86 2006 ______-1.61 2010 ___-0.47 1890___-0.37 1787

02 Dec ___ 10.36 1979 ___ 10.16 1818 ____ 9.79 2006 ______-1.86 2010 ___-0.50 1890___-0.14 1879

03 Dec ___ 10.20 1979 ____ 9.87 1818 ____ 9.67 2006 ______-2.16 2010 ___-0.84 1879___-0.24 1947

04 Dec ___ 10.26 1979 ____ 9.77 2000 ____ 9.50 2006 ______-2.14 2010 ___-1.71 1879___-0.76 1796

05 Dec ___ 10.23 1979 ____ 9.96 2000 ____ 9.84 1775 ______-2.34 1879 ___-1.51 2010___-1.44 1796

06 Dec ___ 10.14 1979 ___ 10.09 2015 ____ 9.83 1898 ______-2.99 1879 ___-1.99 1796___-1.70 2010

07 Dec ___ 10.30 2015 ___ 10.23 1898 ___ 10.07 1979 ______-3.64 1879 ___-2.06 2010___-1.94 1796

08 Dec ___ 10.61 2015 ___ 10.04 1898 ___ 10.00 1934 ______-4.03 1879 ___-2.16 2010___-1.83 1796

09 Dec ___ 10.37 1934 ___ 10.09 2015 ____ 9.77 1979 ______-3.41 1879 ___-1.90 2010___-1.74 1844

10 Dec ____ 9.93 1934 ____ 9.70 1979&2000 ______________-2.70 1879 ___-2.17 1844___-1.51 1796

11 Dec ____ 9.97 1856 ____ 9.81 2000 ____ 9.60 1898 ______-2.79 1844 ___-2.53 1879___-1.56 1819

12 Dec ___ 10.41 1856 ____ 9.91 1831 ____ 9.90 2000 ______-2.63 1844 ___-2.31 1879___-2.03 1819

13 Dec ____ 9.90 1831 ____ 9.83 1956 ____ 9.63 2000 ______-2.73 1981 ___-2.60 1819___-2.27 1844

14 Dec ____ 9.64 1942 ____ 9.46 1831 ___ 9.13 1948&2000*_-3.51 1981 ___-3.01 1878___-2.94 1819

15 Dec ____ 9.39 1942 ____ 9.23 1941 ____ 8.93 1900 ______-3.49 1878 ___-3.36 1981___-2.44 1819

16 Dec ____ 9.23 1942 ____ 9.11 1941 ____ 9.00 1971 ______-3.53 1878 ___-3.46 1981___-2.07 1890

17 Dec ____ 9.17 1842 ____ 9.04 1942 ____ 8.91 1828 ______-3.47 1878 ___-3.27 1981___-2.90 1859

18 Dec ____ 9.51 1985 ____ 9.30 2015 ____ 9.14 1842 ______-3.79 1859 ___-3.33 1981___-2.91 1878

19 Dec ___ 10.26 2015 ____ 9.47 1985 ____ 9.21 1828 ______-4.89 1859 ___-2.80 1788___-2.54 1981

20 Dec ___ 11.00 2015 ____ 9.47 1828 ____ 9.27 1985 ______-4.59 1859 ___-2.78 1788___-2.73 1801

21 Dec ___ 11.46 2015 ___ 10.03 1828 ____ 9.31 1971 ______-3.81 1859 ___-2.47 2010___-2.34 1890

22 Dec ___ 11.44 2015 ___ 10.44 1828 ____ 9.37 1932 ______-3.24 2010 ___-3.19 1859___-2.20 1890

23 Dec ___ 11.10 2015 ___ 10.36 1828 ____ 9.36 1932 ______-4.17 2010 ___-2.74 1890___-2.53 1860

24 Dec ___ 10.54 2015 ___ 10.04 1828 ____ 9.01 1974 ______-4.27 2010 ___-3.07 1890___-2.63 1860

25 Dec ____ 9.90 2015 ____ 9.26 1828 ____ 9.16 1974 ______-4.69 2010 ___-3.03 1890___-2.97 1878

26 Dec ____ 9.49 2015 ____ 9.29 1974 & 1988 ____________ -4.23 2010 ___-3.64 1870___-3.24 1878

27 Dec ____ 9.50 2015 ____ 9.49 1988 ____ 9.34 1974 ______-4.44 1870 ___-3.59 1796___-3.47 2010

28 Dec ____ 9.69 1988 ____ 9.54 2015 ____ 9.40 1974 ______-4.20 1870 ___-3.46 1796___-2.27 1798

29 Dec ____ 9.63 2015 ____ 9.31 1974 ____ 9.30 1988 ______-4.23 1798 ___-3.89 1870___-2.96 1962

30 Dec ____ 9.89 2015 ____ 9.24 1987 ____ 8.89 1988 ______-4.54 1798 ___-3.84 1870___-3.36 1892

31 Dec ____ 9.71 2015 ____ 9.50 1987 ____ 9.11 1920 ______-4.30 1798 ___ -3.63 1870 & 1892

________________________________________________________________________________

*Third place maximum 14 Dec also tied in 2016.

The table now continues with the first post in this series. That post shows the coldest interval that includes

any December days is entirely within December. (13 to 19 Dec 1859). None of the first six entries in January

were colder.

Will post a summary of the longest intervals with weekly extremes. December 2015 is obviously going to be high

on any such list. 

Edited by Roger J Smith
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note: in preparing this section, one error was found in the tables above (edit not available) ... min on 5 Oct of 6.70 was set in 1888 not 1889 as table reads. that fact is reflected in the lists below since a spell of consecutive cold weekly intervals began on that date.

 

Longest spells of extreme warmth and cold 

... compared in same table in two columns ...

This is a list of the longest consecutive, unbroken intervals with highest or lowest values. The periods covered are six days longer than the number of consecutive intervals. As one example, 28 June to 10 July 1976 was 13 intervals of warmest weeks, so 19 days (from 22 June to 10 July) during which each date was part of a warmest week. 

A second table shows the longest cases of long runs of high ranking values not all the highest or lowest but all in the top or bottom three.

Ties are listed in chronological order from earliest to most recent. Whether warm or cold, the order is based on years.

 

Longest spells of highest or lowest weekly values (five or more)

__________________ Warmest ______________________ Coldest

YEAR(s) _______ weeks ending ___ no. _ (days) ______ weeks ending ___ no. _ (days)

1976 __________  28 Jun -- 10 Jul __ 13 __ 19 _______

1807 _________________________________________13 Sep -- 22 Sep __ 10 __ 16

1907 _________________________________________ 03 Jul -- 11 Jul ____ 9 __ 15 ____

2015 __________ 19 Dec -- 27 Dec ___9 __ 15 _______

1947 __________________________________________ 24 Feb -- 04 Mar ___ 9 __ 15 ____

1845 __________________________________________ 15 Mar -- 22 Mar ___ 8 __ 14 ____

1846 ___________ 15 Jun --22 Jun __ 8 __ 14 _________

1895 __________________________________________ 08 Feb -- 15 Feb ___ 8 __ 14 ____

1998 ___________14 Feb -- 21 Feb ___8 __ 14 _______

2005 ___________ 28 Oct -- 04 Nov __ 8 __ 14 _______

2006 ___________ 22 Jul -- 29 Jul ___ 8 __ 14 _______

1782 __________________________________________ 05 Nov -- 11 Nov ___7 __ 13 ____ 

1785 __________________________________________ 28 Mar -- 03 Apr ___ 7 __ 13 ____

1786 __________________________________________ 05 Mar -- 11 Mar ___ 7 __ 13 ____

1837 __________________________________________11 Apr -- 17 Apr ___ 7 __ 13 ____

1846 ___________ 26 Feb -- 04 Mar __ 7 __ 13 _______

1881 __________________________________________18 Jan -- 24 Jan ___ 7 __ 13 ____

1888 __________________________________________ 05 Oct -- 11 Oct ___ 7 __ 13 ____

1921 ___________ 08 Oct -- 14 Oct __ 7 __ 13 ________

1957 ___________ 12 Mar -- 18 Mar __ 7 __ 13 _______

1775 ___________ 30 Apr -- 05 May __ 6 __ 12 _______

1812 _________________________________________ 07 Aug -- 12 Aug __ 6 __ 12 ___

1816 _________________________________________ 03 Sep -- 08 Sep __ 6 __ 12 ___

1830 _________________________________________ 18 Aug -- 23 Aug __ 6 __ 12 ___

1833 ___________ 16 May -- 21 May__ 6 __ 12 _______

1834 ___________ 05 Mar -- 10 Mar __ 6 __ 12 _______

1865 ___________ 13 Sep -- 18 Sep __ 6 __ 12 _______

1879 _________________________________________ 05 Dec -- 10 Dec __ 6 __ 12 _______

1938*___________13 Nov -- 18 Nov __ 6 __ 12 _______

1945 ___________ 16 Apr -- 21 Apr __ 6 __ 12 _______

1947 ___________ 31 May -- 05 Jun __ 6 __ 12 _______

2005 ___________ 21 Mar -- 26 Mar __ 6 __ 12 _______

2006 ___________ 22 Sep -- 27 Sep __ 6 __ 12 _______

2011 ___________ 01 Oct -- 06 Oct __ 6 __ 12 ________

1776 __________________________________________ 30 Jan -- 03 Feb __ 5 __ 11 ____

1782 __________________________________________ 01 May - 05 May __ 5 __ 11 ____

1864 __________________________________________ 24 Aug -- 28 Aug __ 5 __ 11 ____

1890 __________________________________________ 29 Aug -- 02 Sep __ 5 __ 11 ____

1895 __________________________________________ 28 Oct -- 01 Nov __ 5 __ 11 ____

1898 _________ 08 Sep -- 12 Sep __ 5 __ 11 _________

1906 _________ 03 Sep -- 07 Sep __ 5 __ 11 _________

1908 __________________________________________ 24 Apr -- 28 Apr ___ 5 __ 11____

1912 __________________________________________ 13 Aug -- 17 Aug __ 5 __ 11 ____

1979 __________ 02 Dec -- 06 Dec __ 5 __ 11

1995 __________ 02 Aug -- 06 Aug __ 5 __ 11

2008 __________ 09 May -- 13 May __ 5 __ 11

2010 __________________________________________ 30 Nov -- 04 Dec __ 5 __ 11 ____

2010 __________________________________________ 22 Dec -- 26 Dec __ 5 __ 11 ____

* until 2015, there was a 12 day spell 07-18 Nov 1938; 2015 pushed aside 11th and 12th otherwise finished second through most of that same period.

 

Longest spells of top three highest or lowest weekly values (eight or more)

__________________ Warmest ______________________ Coldest

YEAR(s) _______ weeks ending ____ no._ (days) _____ weeks ending ____ no._ (days)

1947 __________________________________________20 Feb -- 11 Mar __ 20 __ 26

1976 __________  27 Jun -- 12 Jul __ 16 __ 22 _______

1846 ___________ 09 Jun --23 Jun __15 __ 21 _______

2015-16 ________ 18 Dec -- 01 Jan__15 __ 21 _______

1907 _________________________________________ 30 Jun -- 13 Jul ___ 14 __ 20

1881 __________________________________________17 Jan -- 28 Jan __ 12 __ 18 

1895 __________________________________________08 Feb -- 19 Feb __12 __ 18

1938 ___________ 07 Nov -- 18 Nov __12 __ 18 _______

1807 _________________________________________ 12 Sep -- 22 Sep __ 11 __ 17

1826 ___________ 30 Jun -- 10 Jul ___11 __ 17 (none were warmest)

1879 __________________________________________ 02 Dec -- 12 Dec _ 11 __ 17 

2010 __________________________________________29 Nov -- 09 Dec __11 __ 17

1782 __________________________________________ 30 Apr - 09 May __10 __ 16

1812 __________________________________________ 05 Aug -- 14 Aug __10 __ 16

1870-71 _______________________________________ 26 Dec -- 04 Jan __ 10 __ 16 

1957 ___________ 11 Mar -- 20 Mar __10 __ 16 _______

2005 ___________ 27 Oct -- 05 Nov __10 __ 16 _______

2006 ___________ 21 Jul -- 30 Jul ___ 10 __ 16 _______

2015 ___________ 07 Nov -- 16 Nov__ 10 __ 16 _______

1782 __________________________________________ 05 Nov -- 13 Nov ___9 __ 15 ____ 

1786 __________________________________________04 Mar -- 12 Mar ___ 9 __ 15

1796 __________ 16 Jan -- 24 Jan ___ 9 __ 15 _______

1845 __________________________________________14 Mar -- 22 Mar ___ 9 __ 15

1846 __________  25 Feb -- 05 Mar __ 9 __ 15 _______

1865 ___________ 10 Sep -- 18 Sep __ 9 __ 15 _______

1883 __________________________________________19 Jul -- 27 Jul ____ 9 __ 15

1949 ___________ 08 Oct -- 16 Oct ___ 9 __ 15 ______ (none was warmest)

1975 ___________ 04 Aug -- 12 Aug __ 9 __ 15 ______

1995 ___________ 30 Jul -- 07 Aug ___9 __ 15 _______

1998 ___________14 Feb -- 22 Feb ___9 __ 15 _______

2006 ___________ 21 Sep -- 29 Sep __ 9 __ 15 _______

1785 __________________________________________28 Mar -- 04 Apr ___ 8 __ 14

1816 __________________________________________02 Sep -- 09 Sep __ 8 __ 14 

1833 ___________ 15 May -- 22 May__ 8 __ 14 _______

1834 ___________ 04 Mar -- 11 Mar __ 8 __ 14 _______

1837 __________________________________________11 Apr -- 18 Apr ___ 8 __ 14

1838 __________________________________________14 Jan -- 21 Jan ___ 8 __ 14

1840 _________________________________________ 18 Sep -- 25 Sep ___ 8 __ 14

1853 _________________________________________ 22 Mar -- 29 Mar ___ 8 __ 14

1855 _________________________________________ 12 Feb -- 19 Feb ___ 8 __ 14

1903 _________________________________________ 17 Jun -- 24 Jun ___ 8 __ 14

1921 ___________ 07 Oct -- 14 Oct __ 8 __ 14 ________

1983 ___________ 12 Jul -- 19 Jul ___ 8 __ 14 _______

1997 ___________ 10 Aug -- 17 Aug __ 8 __ 14 ______

2005 ___________ 21 Mar -- 28 Mar __ 8 __ 14 _______

2011 ___________ 30 Sep -- 07 Oct __ 8 __ 14 ________

_____________________________________________________________________________

Some long spells of warm or cold weather failed to make this second list due to one day missing.

An example would be warmth 19-28 Nov 1994 but 21st missed so maximum spell was seven days.

Looking at the rather large number of three and four day spells, it would seem that in general terms,

a notable warm spell will be 4 to 7 days in duration at least, those that set records but last only 2-3 days

are unusual. 

_________________________________________________________________________________

 

 

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Some new records were set in May 2018 ...

(1) Warmest daily CET mean for 7th 16.9 (was 16.8 in 2008).

(2) Wettest 24th CEP now 13.8 mm (was 9.7 mm in 2014).

(3) Driest 10-day intervals ending 22 and 23 May, both 0.1 mm.

... previous records 0.3 1992 and 0.6 2010. 

 

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June CEP (Central England Precip) figures show some ties for driest 10-day intervals ending 27 to 30 June.

This is because 18 to 30 June came in essentially dry, the way I have been assembling the data, I round off to nearest tenth of mm while the table presents by nearest .01 mm. That is because the data before 1950 were almost always rounded that way, then the hundredths began to appear in the tables. So I have gone back to check the unrounded values of the various years that produced the other zero totals for 18-27, 19-28, 20-29 and 21-30 June. Pretty certain there will be further records to compare moving forward into July when that month reports. 

In 2018, the actual daily values were 18th (0.03 mm), 19th (0.01 mm), 20th (0.02 mm), 21st to 29th (0.00 mm) and 30th (0.01 mm). 

This list shows how the four tied records of 0.0 (adding up rounded values) will compare with tied years by unrounded totals. The tied years only appear if they add up to zero mm rounded to participate in the record values table, a missing value means a total greater than or equal to 0.1 mm.

PERIOD ____ 2018 ____ 1942 __ 1949 __ 1975 __ 1995

18-27 Jun ___ 0.06 ____ ----- ____ 0.00 ___ ---- ___ 0.00

19-28 Jun ___ 0.03 ____ 0.00 ____0.00 ___ ---- ___ 0.00

20-29 Jun ___ 0.02 ____ ----- ____ 0.00 ___ 0.00 __ 0.00

21-30 Jun ___ 0.01 ____ ----- ____ 0.00 ___ 0.00 __ 0.00

Therefore the ties on rounding are not quite ties absolutely as none of the years in question had even 0.01 daily reports (1942 and 1949 might have, the practice was still to round off in the tables, by 1975 and 1995 there are definitely examples of 0.01 to 0.04 type amounts in other spells). 

Edited by Roger J Smith
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Noted an error in the minimum precip tables for 1976, instead of 0.0 ending 1-3 July, should be 30 June to 2 July, so add 1976 to 30 June and remove from 3 July.

Fairly soon I am going to create a new thread with updated tables and abandon this one because of the lack of edit function. 

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July 2018 was the third warmest on record and fourth warmest month.

27th new record 22.5, replaces 21.9 (1948)

22-28 July mean 20.64 replaces 20.44 (1989) as second warmest for that interval.

23-29 July mean 20.20 replaces 19.77 (1900) as third warmest for that interval.

16 day spell of days 18.0 or warmer from 25th June to 10th July average CET of 19.36 ... 

not a top ten mean for these spells but tied fifth for duration.

The interval 27 June to 27 July would have been a 19.3 C 31 day month.

Edited by Roger J Smith
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Some catchup data here to start:

2017 max 21.9 on 19 June

2017 min -0.4 on 12 Dec

2017-18 winter min -3.8 on 1 March

so far 2018 extremes 22.5 on 27 July and -3.8 on 1 March

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

now some additional dry records for CEP data in July

-- all 0.0 ten-day totals ending 1-10 July are tied by 2018

-- one 0.1 ten-day min on 4 July (1943) broken by 0.0 in 2018

-- record of 0.1 on 11 July tied by 2018

Dry spell 18 June to 12 July was 25 days, within which 19 June to 10 July all rounded to 0.0, 22 days. This was about the third or fourth longest dry spell ever recorded since 1931.

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Daily records set in October 2018:

18.5 on 13th was new maximum (16.8 1990 old) and was a "latest in season" outlier record (removing 17.8 on 10th of 1921 and 17.6 on 11th of 1978 from the list of outliers). The next outlier is the 17.2 from 14th of 2017, then the following outlier remains 16.9 on 31st of October (set 2014). 

The rainfall of 15.7 mm on 14th broke the daily maximum of 11.1 mm from 1987. (the 15th of 1987 (18.6 mm) had also fallen to 33.3 mm in 2002, so now both parts of the rainfall preceding the great windstorm of Oct 1987 have been removed as daily records). 

 

Edited by Roger J Smith
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Record CET values in chronological order

__________________________________________

... corrected version with recent updates and a few amended errors ...

 

1772 ___ 19 Apr, -0.2 ___ 29 Oct* 14.0* __ (06-07 Nov, 13.4,13.4) broken in 2015

1773 ___ 11 May, 4.1 __ 03 Jun, 7.9 __ 01 Jul, 10.4 __ 10 Aug* 22.5* __ 23 Sep, 6.0 __ 22 Nov, -2.3

1775 ___ 28,29,30 Apr, 16.9,19.7,17.4 __ 01 Dec, 12.1

1776 ___ 27-31 Jan, -6.5,-6.3,-6.8,-7.5,-7.2 ___ 24 Mar,13.4

1777 ___ 19 Feb, -5.0 ___ 02-03 Mar, 11.1,11.0 ___ 25-27 Mar, 13.9,14.6,14.8 __ 11 Jun, 8.0

1778 ___ 09 Apr, 13.5 (broken 2017 13.7) __ 22 Apr, 3.4

1779 ___ 20 Mar, 12.3

1780 ___ 08 Apr, 2.4 __ 29 May, 21.2 __ 01 Sep* 21.7*

1781 ___ 01 Jun, 21.9

1782 ___ 24 Jan, 10.6

1783 ___ 26 Feb, -4.7 __ 11 Jul, 22.6 __ 31 Dec, -7.1

1784 ___ 26 May* 18.7* __ 24 Jun, 10.1 __ 25 Oct, 2.0 __ 10-11 Dec, -4.5, -6.7

1785 ___ 20 Feb, -6.6 __ 28 Feb-(01 Mar), -3.8, (-3.5) (broken 2018) __ 12 Mar, -2.4 __ 28-29 Mar, -0.3, -0.7 __ 26 Oct, 1.5

1786 ___ 02 Jan, -6.1 __ 05-06 Mar, -2.8*, -4.7 __ 08 Mar, -3.1 __ 30 Jul, 10.6

1787 ___ 25 Aug, 10.5**

1788 ___ 27 May, 19.0 __ 15 Dec, -5.4

1789 ___ 05 Jan, -6.5

1791 ___ 07 Nov, --0.6

1792 ___ 13 Apr, 14.6

1793 ___ 17 Apr* 2.1*

1794 ___ 14 Feb, 10.2

1795 ___ 03 Jan, -7.7 __ 25 Jan, -8.9 __ 19-20 Jun, 7.3, 9.0* __ 20 Oct, 14.9

1796 ___ 13 Jan* 10.0* __ 21 Jan* 10.8* __ 02 Dec, -4.7 __ 25 Dec, -10.8

1798 ___ 08 Apr, 12.5 __ 26-28 Dec, -5.4, -8.4, -8.2

1799 ___ 30-31 Mar, 0.0, -0.8 __ 03 Apr, -0.5

1800 ___ 05 May, 16.7

1801 ___ 05 Nov, 0.8 ___ 29 Nov, -2.6

1802 ___ 31 May-01 Jun, 6.4, 7.7* 

1803 ___ 09 Dec, -4.0

1804 ___ 15 Jan, 10.3 ___ 30 Aug* 19.8* 

1805 ___ 14 Mar, 11.5

1807 ___ 18 Apr, 1.7 __ 30 May, 4.9 __ 08 Sep* 8.9* __ 13-14 Sep, 6.7,6.7 __ 16-18 Sep, 8.1,8.1,6.9 __ 08 Dec, -5.4

1808 ___ 16 May, 20.0 __ 13-14 Jul, 24.5,24.4 __ 30 Sep-01Oct 6.3, 6.1*

1809 ___ 04 Apr* 1.0*

1810 ___ 21 Feb, -4.7

1812 ___ 09 Apr, 1.4 __ 17 Apr* 2.1* __ 28 Jun, 9.4 __ 04-05 Aug, 11.3,11.3 __ 29 Aug, 10.1 __ 25 Sep, 7.4 __ 08 Nov, -1.2 __  10 Nov, 0.1

1813 ___ 21 Feb, 10.6 (broken in 2019) __ 29 Mar, 13.4__ 19 Oct, 1.5

1814 ___ 10 Jan, -6.7 __ 19 Mar, -0.9 __ 25 May, 6.5 __ 07 Jun, 8.6 __ 14 Jun, 19.4 __ 10 Oct, 3.5

1815 ___ 31 Mar, 13.8 __ 19 Nov, -2.1

1816 ___ 09 Feb, -8.8 __ 13 Apr, 1.1 __ 12 May, 4.4 __ 09 Jun, 7.3 __ 29 Jul, 11.0 __ 01-03 Sep, 7.1,7.6,8.2*

1817 ___ 21 Jun, 22.7 __ 22 Aug, 10.4 __ 02-03 Oct, 3.6,4.7

1818 ___ 13 Jun* 20.5* __ 24 Jul, 23.9 __ (16 Oct, 15.8 -- broken 2017) __ 27 Nov 11.3 __ 29 Nov 12.2

1820 ___ 01 Jan, -5.9 __ 15 Jan, -8.5 __ 03 Nov, 1.9

1821 ___ 25 Apr, 15.9 __ 26 May, 4.6 __ 10 Jun, 8.2 __ 02 Jul, 11.3 __ 02 Nov, 14.3 __ 15 Nov, 13.5

1822 ___ 19 Mar, 11.8 __ 28 Mar* 12.6* __ 02 Aug, 11.6

1823 ___ 19 Jan, -8.9 __ 22-23 Jun, 9.0,9.4 __ 08 Jul, 10.6 __ 16 Jul, 11.5 __ 06 Aug* 11.2* __ 08 Aug, 11.5

1824 ___ 27-28 Sep, 6.1*,4.9 __ 17 Oct, 2.5 __ 25 Dec* 10.4*

1825 ___ 15 Jul, 23.7 __ 18 Jul, 23.3

1826 ___ 28 Apr, 3.0 __ 27 Jun, 22.8

1828 ___ 18 Jan 10.0 __ 27 Feb, 11.5 __ 11 Nov, 0.3 __ 28 Nov, 12.0  __ 20 Dec, 11.1

1829 ___ 15 Aug, 10.3 __ 07-08 Oct, 3.5,4.1 __ 20 Nov, -1.2

1830 ___ 05 Feb, -6.3 __ 04 Apr* 1.0* __ 18 Aug, 10.3

1831 ___ 09 Feb, 11.4 __ 06 May, 4.4

1833 ___ 15 May, 20.0 __ 17 May, 19.7 __31 Aug, 9.2

1834 ___ 23 Jan 11.6 __ 26 Jan, 10.0 __ 05 Mar, 10.9 __ 04 May, 18.0 __ 17 Jul, 22.3 __ 30 Dec, 11.0

1835 ___ 02 Apr, 13.9 __ 25-26 Jun, 8.7, 9.7

1836 ___ 20 Jul, 8.7  __ 30,31 Oct, 0.7,0.7

1837 ___ 22-23 Mar, -0.9, -0.8* __ 10 Apr, 0.5 __ 09 May, 5.7

1838 ___ 11 Jan, -5.5 __ 20 Jan, -11.9 __ 13-14 Oct, 2.2,3.1

1839 ___ 07 Apr, 1.0 __ 14-15 May, 3.9, 4.3 __ 29-30 Jun, 9.7,9.1 __ 19 Aug, 10.4

1840 ___ 12-13 Jul, 11.0,10.2

1841 ___ 07-09 Jan, -7.7, -9.2, -5.0 __ 03 Feb* -5.4* __ 12 Jun, 8.6 __ 31 Jul, 10.9 __ 04-06 Sep, 7.7,8.1,8.5 __ 17 Nov, -2.0

1842 ___ 20-21 Oct, 2.1,1.2 __ 16 Dec, 10.8 (broken 2015 11.4)

1843 ___ 23-24 Jul, 10.1,11.1 __ 25 Aug, 10.5** __ 15-16 Oct, 2.5,1.8 __ 18 Oct, 2.4 __ 24 Dec, 10.7

1844 ___ 05-06 Dec, -3.7, -5.5

1845 ___ 12 Feb, -7.7 __ 13-14 Mar, -6.5, -3.7 __ 16-17 Mar, -3.0,-2.2 __ 20 Mar, -1.6 __ 04 Nov* 0.8*

1846 ___ 25 Jan, 11.4 (broken 2016) __ 24 Feb, 11.4 __ 07 Jun, 21.6 __ 20 Jun, 21.7

1847 ___ 11 Mar, -1.9 __ 28 May, 20.6

1848 ___ 12 Sep, 8.1 __ 04 Nov* 0.8*

1849 ___ 20 Apr, 2.3

1850 ___ 15 Jun, 8.1 __ 21 Aug, 9.8

1851 ___ 01 Jan, 10.8

1852 ___ 23 Mar* 12.1* __ 05 Jul, 24.0 __ 09 Oct, 3.3 __ 08 Nov, 13.4

1853 ___ 18 Mar, -1.3 __ 25 Mar, -1.3

1854 ___ 29 Jan, 10.4

1855 ___ 16-18 Feb, -7.3,-7.1,-3.9 __ 22 Feb, -3.3 __ 18 Jun, 8.1

1856 ___ 29 Apr, 0.7 __ 09 Jul, 11.0 __ 07-08 Dec, 12.3,12.1

1857 ___ 05 Apr, 13.3

1858 ___ 08 Jan, 9.9 ___15-16 Jun, 22.9, 20.7* __ 23 Nov, -4.2

1859 ___ 04 Mar, 12.3 __ 07 Apr, 14.7 __ 23-24 Oct, 0.9,0.6 __ 16-18 Dec, -6.6,-7.7,-7.1 __ 31 Dec, 11.1

1860 ___ 06 Aug* 11.2* __ 09-11 Sep, 9.2*, 8.6,8.1 __ 11 Oct, 3.9

1861 ___ 08 May, 2.9

1862 ___ 27 Jun, 10.2 __ 13 Nov, -1.1

1863 ___ 18 Jul, 10.1

1864 ___ 24-26 Aug, 9.1,10.5**,8.8

1865 ___ 17 Apr, 14.9 __ 10 Sep, 19.2

1866 ___ 06 Feb, 10.3 __ 27 Apr, 16.5 __ 01 May, 4.2

1867 ___ 04 Jan, -9.3 __ 15 Mar, -1.6 __ 06 May, 18.8 __ 08 May, 16.9 (broken 2016) __ 22-24 May, 5.0,4.9,5.7 __ 27 Jul, 10.6

1868 ___ 31 Jan, 10.9 __ 19 May, 20.4  __ 21-22 Jul, 23.1,23.2 __ 07 Sep, 21.1 __ 06 Nov, 0.6

1869 ___ 07 Feb, 10.5 __ 11 Apr, 16.0 __14 Apr, 16.1 __ 28-29 May, 6.2,6.2 __ 16 Jun, 9.6 __ 26 Aug, 20.6  __ 27 Oct, 1.4

1870 ___ (19 Apr, 15.4 -- broken 2018 17.6) __ 08 Jul* 21.4* __ 23-24 Dec, -6.4, -6.9 __ 30 Dec, -6.1

1871 ___ 04 Jun* 8.0*

1872 ___ 18-19 May, 4.1,5.2 __ 21-22 Sep, 6.5,6.3 __ 24 Sep, 6.7

1873 ___ 13 Jan* 10.0*

1874 ___ 23 Apr, 15.9 __ 29 Dec, -4.9

1875 ___ 07 Mar, 10.9

1876 ___ 17 Aug, 22.4

1877 ___ 03-04 May, 3.1,3.2 __ 06-07 Jul, 11.3,11.1 __ 23 Aug, 10.3

1878 ___ 22 Jan, 10.3 __ 17 Feb, 10.7 __ 01 Mar, 10.7 __ 20 Jul, 22.9 (broken 2016) __ 14 Dec, -5.3

1879 ___ 24 Mar, -0.6 __ 26 Mar* -0.3* __ 12 Apr, 1.1 __ 07 May, 4.1 __ 10 May, 4.1 __ 03-04 Dec, -4.0,-3.8* __ 07 Dec, -5.7

1880 ___ 03-04 Sep, 20.2,20.7 __ 02 Nov, 0.5 __ 21 Nov, -1.4

1881 ___ 16-17 Jan, -7.7,- 6.2 __ 21-22 Jan, -8.1, -6.4 __ 08 Jun* 8.6* __ 13 Aug, 10.5

1882 ___ 26 Feb, 11.2

1883 ___ 10 Mar, -2.4 __ 15 Jul, 11.5

1884 ___ 15 Mar, 11.9 __ 26 Jul, 11.0

1885 ___ 27 Aug* 11.0* __ 26-27 Sep, 6.0,6.1*

1886 ___ 28 Jul* 11.8* __ 05 Oct, 17.9 

1887 ___ 12 Oct, 3.2 __ 18 Nov, -1.6

1888 ___ 11 Jul, 9.4 __ 01 Aug, 11.9 __ 16-17 Aug, 9.5, 10.9 __ 01 Oct* 6.1* __ 05-06 Oct, 4.6,4.1

_ _ _ _ _ _ __ 27-28 Oct, 16.7, 15.6 __ 04 Dec, 12.1

1890 ___ 07 Jan, 10.3 __ 27 Aug* 11.0* __ 30 Aug, 9.5 __ 22 Dec, -6.8

1891 ___ 18 Jan, -6.1 __ 28 Jul* 11.8*

1892 ___ 16 Apr, 2.0 __ 17 Jul, 11.0 __ 19 Jul, 10.6 __ 10 Aug, 10.8

1893 ___ 19 Feb, 10.6 __ 20 -21 Apr, 16.6,16.1 __ 15 Aug, 22.1 __ 18 Aug, 22.6

1894 ___ 06 Jan, -6.9 __ 21 May, 5.7 __ 01 Nov* 13.5

1895 ___ 06-08 Feb, -7.3,-7.2,-8.3 __ 10 Feb -6.2 __ 25-27 Sep, 19.4,18.4,19.0  __ 28,29 Oct, 0.9, 0.3

1896 ___ 16 Jun* 20.7*

1897 ___ 17 Oct, 15.6

1898 ___ 06 Jan, 10.3 __ 21 Jan* 10.8* __ 07 Aug, 11.6 __ 06 Sep, 20.8 __ 08-09 Sep, 21.3,19.8 __ 17 Sep, 20.4 __ 05-06 Dec, 12.6,12.3

1899 ___ 10 Feb, 12.0 __ 21 Mar, -1.6 __ 23 Mar* -0.8* __ 25 Aug, 20.9

1901 ___ 26-27 Mar, -0.3*, 0.1 __ 16 Nov, -2.9

1902 ___ 21-22 Jul, 11.3,11.5 __ 11 Aug, 10.8

1903 ___ 08 Feb, 11.4 __ 22 Mar, 12.6  __ 14 Jun, 7.9 __ 21 Jun, 9.8

1904 ___ 29 Feb, -2.4 __ 24 Nov, -4.6 __ 26 Nov, -1.7 __ 17 Dec, 11.6 (broken 2015 12.5)

1906 ___ 31 Aug-02 Sep, 21.3,21.8*,22.6 __ 22 Oct, 16.2

1907 ___ 20 May, 5.5 __ 03 Jul, 10.1

1908 ___ 17 Jan, 10.2 __ 23-25 Apr, 2.6, 0.5, 1.8 __ 03 Sep* 8.2*

1909 ___ 04-05 Mar, -2.9, -2.8* __ 06 Jun 8.4

1911 ___ 05-06 Apr, 0.4, 0.8 __ 12-14 Aug, 22.2, 23.6, 21.3

1912 ___ 04 Feb, -5.0 __ 03 Aug, 10.5 __ 12 Aug, 10.5 __ 14 Aug, 10.8 __ 09 Sep* 9.2* __ 04 Oct, 5.1 __ 14 Dec, 11.8

1914 ___ 08 Jun* 8.6*

1915 ___ 13 May, 5.0 __ 27 Nov, -2.6

1916 ___ 20-21 May, 17.8,18.8

1917 ___ 09 Mar, -3.0 __ 01-02 Apr, -0.2, -0.5 __ 17 Jun, 21.4

1918 ___ 22 May, 19.5 __ 29 Sep, 5.5 __ 13 Dec, 11.6

1919 ___ 27 Apr, 2.7 __ 28 Aug, 10.5 __ 20 Sep, 6.8 __ 12 Nov, -1.4

1920 ___ 30 Mar, 13.4 (broken 2017 15.1) __ 05 Jul, 10.7 __ 25 Jul, 10.9 __ 20 Aug, 10.5

1921 ___ 10 Jan, 11.1 __ 09-10 Jul, 21.6,22.1 __ 06-07 Oct, 19.0,16.9 __ 10 Oct, 17.8 __ 19 Oct, 16.3 __ 09 Nov, -0.5

1922 ___ 25 Feb, 11.0 __ 23 May, 19.5

1923 ___ 01-02 Feb, 11.4, 11.0 __ 07 Jul* 22.6* __ 12 Jul, 23.7 __ 25 Nov -1.5

1925 ___ 14 Nov, -1.1 __ 04 Dec* -3.8*

1926 ___ 03 Apr* 15.0* __ 18-19 Sep, 19.7,20.9

1927 ___ 21 Mar* 11.7* __ 26 Oct, 14.7

1928 ___ 16 Feb, 10.0 __ 10 Apr, 13.5 __ 26 Apr, 16.1 __ 17 Jun, 9.1

1929 ___ 13-15 Feb, -7.0,-7.1,-8.0 __ 27 Feb, -2.8 __

1930 ___ 19 Jan, 11.1 __ 27 Aug, 22.8 __ 29 Aug, 22.6 __ 15 Oct, 15.7

1931 ___ 21 Mar* 11.7* __ 09 Aug, 11.0 __ 08 Sep* 8.9* __ 22 Oct, 2.5

1932 ___ 03 Jan, 11.6 __ 19 Aug, 22.8

1934 ___ 14 Sep, 19.3 __ 1 Nov, 1.5 __ 09 Dec, 11.8

1935 ___ 17 May, 3.6 __ 23-25 Jun, 21.8,22.0,21.6

1936 ___ 21 Apr, 2.4

1938 ___ 15.4, 05 Nov, 12-14 Nov, 13.8*,14.6,13.4

1939 ___ 11 Feb, 11.4 __ 12 Apr, 14.4

1940 ___ 08 Jun, 21.4

1941 ___ 22 Jun, 23.0

1942 ___ 28 Aug, 22.3

1943 ___ 31 Jul* 23.4*

1944 ___ 28 Jan, 9.8 __ 30 May, 21.0

1945 ___ 26 Jan, -7.6 __ 18 Feb, 11.7 __ 23 Feb* 12.1* __ 15-16 Apr, 16.3,17.0 __ 18 Apr, 14.5 (broken 2018 17.0)  __ 30 Apr, 2.6  __ 09 May* 17.6* __ 12 May, 18.8 __ 12 Sep, 20.4

1946 ___ 03-04 Apr, 15.0* 15.6 __ 04 Nov, 14.2

1947 ___ 23-25 Feb, -3.5,-6.7,-5.1 __ 07 Mar, -3.3 __ 31 May, 20.5 __ 02-03 Jun, 22.3,23.0 __ 16 Aug, 21.6

_ _ _ _ _ _ __ 15 Sep, 18.8 __ 20 Sep, 18.4 __ 12 Nov* 13.8* __ 21-23 Nov, 13.7,14,4,13.3 __ 01 Dec, -3.0

1948 ___ 02 Jan, 10.4 __ 04 Jan, 10.5 __ 09 Mar, 12.4 __ 28,29,30 Jul, 23.7,25.2,23.1

1949 ___ 05 Sep, 22.4

1950 ___ 06 Jun, 22.5

1952 ___ 18 May, 19.1 __ 07 Sep, 8.6 __ 19 Sep, 7.4

1953 ___ 22 Feb, 10.7 __ 24-25 May, 18.8,21.0

1955 ___ 22-23 Aug, 22.1,22.1

1956 ___ 01-03 Feb, -6.8,-6.5,-5.4* __ 22-23 Sep, 18.7,18.3

1957 ___ 05 Jan, 11.4 __ 10-12 Mar, 11.6,12.6,13.4

1958 ___ 15 Feb, 11.2

1959 ___ 28 Feb, 11.4 __ 10 May, 18.2 __ 13 May, 17.4 __ 04 Oct, 17.7

1960 ___ 29 Feb, 12.0

1961 ___ 14 Jul, 11.7 __ 16 Sep, 19.6

1962 ___ 01 Jun* 7.7*

1963 ___ 23-24 Jan, -8.4,-8.2 __

1964 ___ 20 Jun* 9.0*  __ 25 Nov, 12.1

1965 ___ 02-03 Mar, -3.2,-3.9 __ 04 Jul, 10.0 __ 15 Nov, -2.1

1966 ___ 14-15 Apr, 0.5, 1.4 __ 02 May, 16.4

1970 ___ 09-11 Jun, 20.9,21.5,21.0

1971 ___ 21 Dec, 11.4

1973 ___ 30 Nov, -1.7

1975 ___ 04 Aug, 23.4 __ 07-08 Aug, 22.8,23.7

1976 ___ 12 Jan* 9.9* __ 26 Jun, 22.3 __ 28 Jun - 4 Jul, 22.6,22.4,22.1,22.9,22.8,24.6,24.7_ 06-08 Jul 23.3,22.6*,21.4*

1977 ___ 10 Nov, 13.4

1978 ___ 11 Apr, 1.3 __ 11,12 Oct, 17.6,16.5 __ 25 Oct* 14.0* __ 18 Nov, 12.2

1979 ___ 02 May, 3.8 __ 05 May, 4.0

1980 ___ 24 Nov, 12.7

1981 ___ 26 Apr, 3.3 __ 12-13 Dec, -8.5, -6.5

1982 ___ 14 Jan, -7.6 __04-05 Jun, 20.3, 21.3 __ 01 Nov* 13.5

1983 ___ 26 Nov, 12.1 __ 25 Dec* 10.4*

1984 ___ 27 May, 6.6 __21 Aug, 21.6 __ 29 Oct* 14.0*

1985 ___ 01 Oct, 20.2 __ 02-03 Dec, 12.2,12.2 __ 15 Dec, 11.2

1986 ___ 11 Feb, -4.2 __ 15 Sep, 7.9

1987 ___ 12-13 Jan, -7.7,-6.6 __ 27-29 Dec, 10.6 (broken 10.9 in 2015),11.5,12.0

1988 ___ 09 Nov, 12.5

1989 ___ 06 Mar, 12.0 __ 13 Jun* 20.5* __ 23 Jul, 22.4

1990 ___ 11 Jan, 10.1 __ 16 Jan,10.8 __ 20 Feb, 11.3 __ 18 Mar, 14.1 __ 01 May*16.1* __ 03 May, 17.7

_ _ _ _ _ _ __ 03 Aug, 24.4 __ 24 Aug, 21.5 __ (13-14 Oct, 16.8,16.1 -- broken in 2018 and 2017).

1991 ___ 13 Mar, 12.8 __ 02 Jun, 7.6 __ 04-05 Jun, 8.0,8.2* __ 22-23 Dec, 11.6,11.8

1992 ___ 14 May, 18.8

1993 ___ 10 Jul, 11.2 __ 19 Dec, 11.6 (broken 13.1 in 2015)

1994 ___ 19 Nov, 12.7 __ 11-12 Dec, 12.6, 12.9 (monthly max until 2015)

1995 ___ 01 Apr, 13.3 __ 31 Jul*,01-02 Aug, 23.4*24.9,24.6 __ 20 Aug, 21.9 __ 08-09 Oct, 17.7,17.5

1996 ___ 16 May, 5.2 __ 03 Nov, 15.0

1997 ___ 10-11 Aug, 22.5* 22.6 __ 16-17 Nov, 13.4,13.1 __ 10 Dec, 10.9

1998 ___ 09 Jan, 10.7 __ 12-13 Feb, 11.4,12.0 __ 28 Mar* 12.6* __ 21 Oct, 15.2 __ 23 Oct, 14.4

1999 ___ 11 Sep, 20.3

2000 ___ 30 Jan, 10.2 __ 08 Mar, 12.2

2001 ___ 30 Nov, 12.4

2003 ___ 27 Jan, 10.4 (broken 2016) __ 16 Jul, 22.7 __ 05-06 Aug 23.1,22.5 __ 09 Aug 23.9

2004 ___ 03,04,05 Feb, 12.2,12.8,11.8 __ 16 Mar, 13.2

2005 ___ 17 Mar, 13.2 __ 01 May* 16.1* __ 18-19 Jun, 21.2, 22.1 __ 30 Oct, 15.5 __ (11 Nov, 13.0) broken in 2015

2006 ___ 12 Jun, 20.8 __ 19 Jul, 24.5 __ 25-26 Jul, 22.7,23.2 __ 13 Sep, 19.4 __ 21 Sep, 21.4 __ 24 Sep, 18.3

2007 ___ 12 Jan* 9.9* __ 24 Apr, 15.3

2008 ___ 20 Jan, 11.2 __ (07 May, 16.8 -- broken 2018 16.9) __ 11 May, 18.6 __ 30 Aug* 19.8*

2009 ___ 24 Oct, 14.3 __ 20 Nov, 12.8

2010 ___ 28 Nov, -4.0 __ 19-21 Dec, -6.8,-7.0,-5.9

2011 ___ 14 Jan, 10.2 __ 06 Apr, 15.1 __ 22 Apr, 15.4 __ 28-30 Sep, 18.9,19.7,20.0 __ 02-03 Oct 17.9,19.8 __ 26 Dec, 11.0

2012 ___ 23 Feb, 11.7

2013 ___ 25 Oct* 14.0*

2014 ___ 18 Oct, 16.3 __ 31 Oct, 17.9 __ 18 Dec, 11.8 (broken 2015 12.5)

2015 ___ 01 July, 24.6 __ 06-07 Nov, 14.3,13.8 __ 11 Nov, 13.9

________ 16-19 Dec, 11.4, 12.5, 12.5, 13.1 ___ 27 Dec 10.9

2016 ___ 25 Jan 11.6, 27 Jan 10.5, 08-09 May, 17.8, 17.6*, 20 July 23.5

_________ 13-14 Sep 20.7, 21.3

2017 ____ 30 Mar 15.1 __ 09 Apr, 13.7 __ 26 May* 18.7* __ 14 Oct, 17.2 __ 16 Oct 16.4 __ 

2018 ___ 01 Mar, -3.8 __ 18-19 Apr, 17.0, 17.6 __ 07 May 16.9 __ 27 July, 22.5 __ 13 Oct 18.5

2019 ___ 21 Feb, 11.2

(note: colour code is red for record highs and blue for record lows, bold type for monthly extremes).

* tied with one other year

** (one case) tied with two other years (min 25 Aug)

There was a discussion of close record max and min following this post originally, and while working on this, I spotted an even closer pair, just four days apart -- max on 27 April 1866 was followed by min on 1st of May 1866. 

Edited by Roger J Smith
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Longest intervals with no (surviving) records as of today ...

4 years 38 days __ 02 May 1966 to 09 June 1970

2 years 306 days _ 05 Jan 1789 to 07 November 1791

2 years 197 days _ 21 Apr 1936 to 05 November 1938

__________________________________________________

Years with no surviving records ...

1774, 1790, 1797, 1806, 1811, 1819, 1827, 1832, 1889, 1900, 1905, 1910,

1913, 1924, 1933, 1937, 1954, 1967, 1968, 1969, 1972, 1974, 2002

_____________________________________________________

Years with most records ...

1947 _15 (10 maxima incl one tied, and 5 minima)

1976 _11 (11 maxima incl three tied)

1888 _10 (7 minima incl one tied, and 3 maxima)

1841 _10 (all minima, 1 tied)

2011 _ 9 (all maxima)

2015 _ 9 (all maxima)

1807 _ 9 (all minima, 1 tied)

1812 _ 9 (all minima, 1 tied)

1895 _ 9 (6 minima, 3 maxima)

1898 _ 9 (8 maxima incl one tied, and 1 minimum)

1945 _ 9 (7 maxima incl two tied, and 2 minima) 

______ had 10 until 2018 removed one from April. 

_______________________________________

1990 had 10 until 2017 and 2018 removed two from 13-14 October, now has eight (all warm, two tied)

a number of other years have eight records.

_____________________________________________

The longest stretch without a surviving warm record is 8 years, 266 days from 2 April 1835 to 24 December, 1843 (as of end of 2018). 

The longest stretch without a surviving cold record is 14 years 195 days from 16 May 1996 to 28 November, 2010 (as of end of 2018). Previous to that, a stretch of 8 years, 280 days from 21 April 1936 to 26 January 1945 has no surviving cold records. 

 

Edited by Roger J Smith
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Least extreme values for each month (daily CET)

(1772 to 2018 excl Dec)

... this table lists the two lowest values of monthly maximum, and the 

two highest values of monthly minimum daily means (and ties) ...

 

Month ______ Lowest Max __ 2nd lowest _______ Highest Min __ 2nd highest

_ JAN ______ 0.8 _ 1814 ___ 2.8 _1830&1963 ___4.0 _ 1796 ___ 3.8 _ 1916

_ FEB ______ 0.7 _ 1947 ___ 2.0 _1963 ________4.4 _ 1872 ___ 4.0:_ 1990

_ MAR ______4.6 _ 1789 ___ 5.0^_ 1837________6.2 _ 1938 ___ 5.6 _ 1933

_ APR ______8.7 _ 1809 ___ 8.8 _ 1812 ________7.4 _ 1844 ___ 7.3 _ 2009

_ MAY _____12.0 _ 1810 ___12.8_1887,94,1965___10.5 _ 1833 ___10.2 _1829&1999

_ JUN _____ 14.2 _ 1972 ___14.9 _1819&60 ____14.2 _ 1846 ___14.0 _ 2003

_ JUL _____ 15.4 _ 1802 ___ 16.2 _ 1840 ______ 16.3 _ 1783 ___16.2 _ 2018

_ AUG _____15.7 _1816,60,1912 _ 16.0_1845 _____15.6 _ 1780 ___14.9 _ 1801

_ SEP _____ 14.1 _ 1863&1912 _14.3 _ 1845 _____13.4 _ 1949 ___13.0 _ 2006

_ OCT ______ 9.0 _ 1817 ___10.2 _ 1784 ______ 10.2 _ 2006 __ 10.1 _ 1945,2001,2005 

_ NOV ______ 6.2 _1851&78 _6.8 _ 1860 _______ 6.3 _ 2011 ___ 6.0 _ 1946

_ DEC ______ 3.4*_ 1933 ___4.4 _ 1890 ________5.6 _ 2015 ___ 4.2 _ 2013

___________________________________

* for December, the lowest maximum reads out as 2.8 (1786) but this month had no daily data, just a monthly average.

(it is considered unlikely that the actual low max was low enough to qualify here) 

^ March 2013 ranked third at 6.8 ... : Feb 2014 ranked third at 3.8

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The November 2018 mean of 8.3 removes one of the closest to normal "never recorded" monthly values. Now 8.8 is November's closest to average missing CET value. 

This is the full list after November 2018, the least extreme values are closest to the long-term average in the central column of the table. This table includes the least extreme unclaimed values between the current extremes for each month. 

MONTH ___ Missing values below average_ 1659-2018 average _Missing values above average

JAN _______(-3.1 min) -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 (7.5 max)

FEB _______(-1.9 min) -1.5 to -1.2, -0.9, -0.8,

_____________-0.6 to -0.3, -0.1, 0.2, 0.3, 1.1, 1.3 _____ 3.8 _____ 7.4, 7.6, 7.7, 7.8 (7.9 max)

MAR _______ (1.0 min) 1.1, 1.3 to 1.7, 2.2, 2.4, 2.6 ____ 5.3 _____ 8.0, 8.5, 8.6, 8.8, 8.9, 9.0 (9.2 max)

APR _______ (4.7 min) 4.8, 4.9, 5.0, 5.1, 5.3, 5.6 ______ 7.9 _____ 10.7 to 11.1, 11.3 to 11.7 (11.8 max)

MAY _______ (8.5 min) no values missing ___________ 11.2 _____ 14.0 to 15.0 (15.1 max)

JUN _______ (11.5 min) __ 11.6, 11.7 _______________14.3 _____ 16.3, 16.5, 16.7, 17.2, 17.4-17.9, 18.1 (18.2 max)

JUL _______ (13.4 min) no values missing ___________ 16.0 _____ 18.9, 19.0, 19.2, 19.3, 19.4, 19.6 (19.7 max)

AUG _______ (12.9 min) 13.1, 13.2, 13.4 ____________ 15.6 _____ 17.7, 17.9, 18.4, 18.5, 18.8, 19.0, 19.1 (19.2 max)

SEP _______ (10.5 min) 10.8, 10.9 _________________ 13.3 _____ 15.5, 15.8, 15.9, 16.1, 16.2, 16.4, 16.5, 16.7 (16.8 max)

OCT _______ (5.3 min) 5.4 to 6.3, 6.6, 6.7, 6.8, 7.7 _____ 9.7 _____ 12.1, 12.2, 13.2 (13.3 max)

NOV _______ (2.3 min) 2.4 to 2.7, 3.8 ________________6.1 ______ 8.8, 9.0, 9.7 to 10.0 (10.1 max)

DEC _______ (-0.8 min) -0.6, -0.4, -0.1 to +0.2, 0.8, 0.9  _ 4.1 ______ 5.9, 7.0, 7.1, 7.8, 7.9, 8.0, 8.2 to 9.6 (9.7 max)

____________________________________________________________________________

By a wide margin, 5.9 (DEC) is the most surprising missing value. If it occurred this year, it would rank 96th warmest. The highest ranked missing value other than that would be 1.3 in Feb (would rank 31st coldest). 7.7 next October would be 26th coldest. 

Perhaps the least represented value is 3.1 in January with one case (1832) -- that despite the fact that 3.1 is only 0.2 below the long-term average for January. This month is ranked 149th coldest. 

Edited by Roger J Smith
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New record high daily precip (CEP) for 15 Dec is 10.1 mm (narrowly edges out 10.0 mm from 1989). 

This thread in general is being replaced one post at a time in a new thread in this historical weather forum, C.E.T. Averages and Extremes 1772 to 2018. So far I have transferred most of page one over to there and while doing so, I found a few typos that are fixed now. 

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New daily CEP records for 10 and 12 June include the second wettest June day (since 1931) on 10th (32.4 mm). Only 19 June 1973 was wetter at 35.6 mm. Also, the ten intervals from 1-10 June to 10-19 June 2019 were wettest ten day intervals and the wettest of them (92.5 mm for 4-13 June) was the highest ten-day total at any point in the year except for 11-20 and 12-21 Dec 1989. 

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Still in this older thread for CEP records ... new daily record on 30th, the 28th failed to break a higher mark. Also new 10-day total records for 29-30 Sep and provisionally very likely to 3 Oct (all five broken were in 1976). These tables are back on page 3 of this thread. Eventually all of the better tables will find their way over to the 1772-2018 thread which has most of the temperature data now.

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