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

[Roger J Smith]

MAY

__ See January post previous page for info on addition of v2.0 data. Two lines of data appear for

__ __ every date unless no adjusted data.

Date ______ Record Max since 1940 __  previous mark ______ Record Min since 1940 __ previous mark

leg __01 __ 16.1 (1990&2005) __ 15.9 (1958)*______ 4.3 (1945) _______ 4.2 (1866) 

v2.0_01 __ 16.0 (1990&2005) __ 15.9 (1958)*______ 4.2 (1945) _______ 4.3 (1866) 

leg__02 __ 16.4 (1966) ________ 16.1 (1807) ________ 3.8 (1979) _______ 4.3 (1856)

v2.0_02 __ 16.4 (1966) ________ 16.1 (1807) ________ 3.7 (1979) _______ 4.4 (1856)

leg__03 __ 17.7 (1990) ________ 15.9 (1808) ________4.7 (1967&1979) __ 3.1 (1877)

v2.0_03 __ 17.6 (1990) ________ 15.9 (1808) ________4.7 (1967&1979) __ 3.2 (1877)

leg__04 __ 17.7 (1990) ________ 18.0 (1834) ________ 4.5 (1979) _______ 3.2 (1877)

v2.0_04 __ 17.7 (1990) ________ 18.0 (1834) ________ 4.4 (1979) _______ 3.2 (1877)

leg__05 __ 16.2 (1995) ________ 16.7 (1800) ________ 4.0 (1979) _______ 4.2 (1877)

v2.0_05 __ 16.2 (1995) ________ 16.7 (1800) ________ 3.9 (1979) _______ 4.2 (1877)

leg__06 __ 16.5 (1995) ________ 18.8 (1867) ________ 5.5 (1957) _______ 4.4 (1831)

v2.0_06 __ 16.5 (1995) ________ 18.6 (1867) ________ 5.5 (1957) _______ 4.4 (1831)

leg__07 __ 16.9 (2018.)________ 16.8 (2008.)**______ 4.9 (1957) _______ 4.1 (1879)

v2.0_07 __ 17.0 (2018.)________ 16.9 (2008.)**______ 4.9 (1957) _______ 3.8 (1879)

leg__08 __ 17.8 (2016) ________ 16.9 (1867) _________ 5.0 (1941) _______ 2.9 (1861)

v2.0_08 __ 17.9 (2016) ________ 16.9 (2008) 16.8 (1867) _ 5.0 (1941) _____ 3.1 (1861)^ 

leg__09 __ 17.6 (1945&2016) __ 17.1 (1833) _________ 6.0 (1941) _______ 5.7 (1837) 

v2.0_09 __ 17.6 (1945&2016)___ 17.1 (1833) _________ 6.0 (1941) _______5.2 (1910)^

leg__10 __ 18.2 (1959) _________ 16.8 (1784) _________ 6.2 (1941) _______ 4.1 (1879) 

v2.0_10 __ 18.2 (1959) _________ 16.8 (1784) _________ 6.2 (1941) _______ 4.2 (1879) 

leg__11 __ 18.6 (2008.)_________ 17.3 (1912&1945) __ 6.2 (2010) _______ 4.1 (1773) 

v2.0_11 __ 18.7 (2008.)_________ 17.2 (1945) 16.9 (1912) __ 6.3 (2010) ___ 4.1 (1773) 

leg__12 __ 18.8 (1945) _________ 17.7 (1907) _________ 5.6 (2010) _______ 4.4 (1816)

v2.0_12 __ 18.8 (1945) _________ 17.5 (1907) _________ 5.7 (2010) _______ 4.4 (1816)

leg__13 __ 17.4 (1959) _________ 16.8 (1947)***______ 6.3 (2010) _______ 5.0 (1915)

v2.0_13 __ 17.4 (1959) _________ 16.8 (1947)***______ 6.3 (2010) _______ 5.1 (1855)^

leg__14 __ 18.8 (1992) _________ 18.0 (1965)****_____6.8 (1946&1995)__3.9 (1839)

v2.0_14 __ 18.8 (1992) _________ 18.0 (1965)****_____6.7 (1946) ________3.9 (1839)

leg__15 __ 18.5 (2000) __________20.0 (1833) _________ 5.6 (1941) _______ 4.3 (1839)

v2.0_15 __ 18.4 (2000) __________20.0 (1833) _________ 5.6 (1941) _______ 4.3 (1839)

both_16__ 17.3 (1952) __________ 20.0 (1808) ________ 5.2 (1996) _______ 5.3 (1935)

leg__17 __ 19.0 (1952) __________ 19.7 (1833) _________6.1 (1996) _______ 3.6 (1935)

v2.0_17 __ 19.0 (1952) __________ 19.7 (1833) _________6.2 (1996) _______ 3.6 (1935)

leg__18 __ 19.1 (1952) __________ 18.4 (1809) _________ 5.5 (1996) _______ 4.1 (1872)

v2.0_18 __ 19.0 (1952) __________ 18.4 (1809) _________ 5.5 (1996) _______ 4.2 (1872) 

leg__19 __ 16.8 (1952) __________ 20.4 (1868.)_________ 6.1 (1955) _______ 5.2 (1872)

v2.0_19 __ 16.8 (1952) __________ 20.3 (1868.)_________ 6.2 (1955) _______ 5.3 (1872)

leg__20 __ 16.9 (1992) __________ 17.8 (1916) _________ 7.3 (1968.)_______ 5.5 (1907)

v2.0_20 __ 16.8 (1992) __________ 17.5 (1916) _________ 6.9 (1968.)_______ 5.8 (1894)^

leg__21 __ 17.9 (1989) __________ 18.8 (1916) _________ 6.3 (1955) _______ 5.7 (1894)

v2.0_21 __ 17.9 (1989) __________ 18.8 (1918)^________ 6.3 (1955) _______ 5.7 (1894)

leg__22 __ 17.6 (1989) __________ 19.5 (1918.) ________ 8.0 (1954&1968.)__5.0 (1867)

v2.0_22 __ 17.6 (1989) __________ 19.6 (1918.) ________ 7.9 (1954) _______ 5.1 (1867)

leg__23 __ 18.1 (1989&2010) ____ 19.5 (1922) ________ 6.6 (1948.)_______ 4.9 (1867)

v2.0_23 __ 18.2 (2010) ___________ 19.5 (1922) ________ 6.6 (1948.)_______ 5.0 (1867)

leg__24 __ 18.8 (1953) ___________ 18.6 (1871) ________ 7.5 (2013) _______ 5.7 (1867)

v2.0_24 __ 18.8 (1953) ___________ 18.5 (1871) ________7.6 (1948&2013)__5.7 (1867)

leg__25 __ 21.0 (1953) ___________ 19.8 (1807) ________ 8.2 (1948&1962)__6.5 (1814)

v2.0_25 __ 20.9 (1953) ___________ 19.8 (1807) ________ 8.2 (1948&1962)__6.5 (1814)

both_26 __18.7 (2017) ___________ 18.7 (1784&2017) __6.8 (1962) _______ 4.6 (1821) 

leg__27 __ 18.6 (2017) ___________ 19.0 (1788.) ________ 6.6 (1984) _______ 6.9 (1821)

v2.0_27 __ 18.7 (2017) ___________ 19.0 (1788.) ________ 6.7 (1984) _______ 6.9 (1821)

leg__28 __ 18.1 (1992) ___________ 20.6 (1847) _______ 8.3 (1961&2007) __ 6.2 (1869)

v2.0_28 __ 18.1 (1992) ___________ 20.6 (1847) _________ 8.3 (1961)^ ______6.3 (1869)

leg__29 __ 21.1 (1944) ___________ 21.2 (1780) _________ 8.2 (1961) _______ 6.2 (1869)

v2.0_29 __ 21.1 (1944) ___________ 21.2 (1780) _________ 8.2 (1961) _______ 6.3 (1869)

leg__30 __ 21.0 (1944) ___________ 18.3 (1895) _________ 8.0 (1975) _______ 4.9 (1807)

v2.0_30 __ 21.0 (1944) ___________ 18.0 (1895) _________ 8.0 (1975) _______ 4.9 (1807)

both_31 __ 20.5 (1947) ___________ 20.0 (1781) ________ 7.1 (1975) ________6.4 (1802)

_______________________________________________

* 01 May -- as the previous record also in the recent interval, 15.5 (leg, 15.3 v2.0) in 1908 was record maximum until 1958.

**07 May -- as the previous record also in the recent interval, 16.1 in 1823 (tied in 1976, leg+v2.0) was record maximum until 2008.

^ 8 May 3.1 (1861) is still the monthly low daily mean (2.9 in legacy) and retained it because 3 May 1877 incr 3.1 leg to 3.2 v2.0. 

^ 9 May 1910 (5.2) gained a record with a decrease from 5.8 in legacy CET, while 1837 stayed at 5.7 and lost its record. 

^ 13 May 1855 (5.1) gained a record by remaining at 5.1 while 1915 increased from 5.0 to 5.4.

***13 May - as the previous record also in the recent interval, 16.7 in 1895 (leg+v2.0) was record maximum until 1947 (16.8 both).

****14 May -as the previous record also in the recent interval, 17.6 in 1808 was record maximum until 1965. 

^ 20 May 1894 (5.8) gained a record with a decrease from 6.0 while 1907 went up from 5.5 to 6.2, losing its record. 

^ 21 May 1916 (18.5) lost a record with a decrease from 18.8, while 1918 gained the record by gaining 0.2 from 18.6 to 18.8.

^ 28 May 2007 (8.4) dropped out of tie for "recent coldest" after its 0.1 increase in v2.0. 

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

JUNE

Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark

leg__01 __ 20.8 (1947) _______ 20.9 (1781) _______ 7.7 (1962) ________ 7.7 (1802&1962) 

v2.0_01 __ 20.9 (1947) _______20.9 (1781 &1947)_ 7.7 (1962) _______ 7.7 (1802&1962) 

leg__02 __ 22.3 (1947) _______ 19.5 (1781) _______ 7.6 (1991) ____ 8.1 (1975), 8.4 (1964) and 8.7 (1782)

v2.0_02 __ 22.3 (1947) _______ 19.5 (1781) _______ 7.4 (1991) ____ 7.9 (1975), 8.3 (1964) and 8.7 (1782)

leg__03 __ 23.0 (1947) _______ 20.1 (1813) _______ 8.6 (1975) ________ 7.9 (1773)

v2.0_03 __ 22.9 (1947) _______ 20.1 (1813) _______ 8.5 (1975) ________ 7.9 (1773)

leg__04 __ 20.3 (1982) ________ 20.2 (1804) _______ 8.0 (1991) _______ 8.0 (1871&1991) 

v2.0_04 __ 20.2 (1982) ________20.2 (1804&1982) __7.8 (1991) ______ 8.1 (1871) 

leg__05 __ 21.3 (1982) _______ 20.7 (1786&1980) __ 8.2 (1991) _______ 8.4 (1880)

v2.0_05 __ 21.2 (1982) _______ 20.7 (1786&1980) __ 8.1 (1991) _______ 8.4 (1880)

leg__06 __ 22.5 (1950) _______ 21.1 (1942)* ________ 9.6 (1989) ________8.4 (1909)

v2.0_06 __ 22.4 (1950) _______ 21.1 (1942)* ________ 9.4 (1989) ________8.3 (1909)

leg__07 __ 20.4 (1950) _______ 21.6 (1846) _________ 8.8 (1985) ________8.6 (1814)

v2.0_07 __ 20.4 (1950) _______ 21.6 (1846) _________ 8.7 (1985) ________8.6 (1814)

leg__08 __ 20.4 (1940) ________19.5 (1915) _________ 8.8 (1985) ________8.6 (1881&1914) 

v2.0_08 __ 20.2 (1940) ________19.2 (1915&1933) __ 8.7 (1985) ________8.2 (1881)^ 

leg__09 __ 20.9 (1970) ________ 20.4 (1940)**_______ 9.3 (2015) ________7.3 (1816) (7.9 1881) not rec

v2.0_09 __ 20.9 (1970) ________ 20.3 (1940)**_______ 9.2 (2015) _______ 7.3 (1816) (7.9 1881) not rec

leg__10 __ 21.5 (1970) ________ 21.1 (1822) _________ 8.7 (1955) _______ 8.2 (1821) 

v2.0_10 __ 21.5 (1970) ________ 21.1 (1822) _________ 8.7 (1955) _______ 8.2 (1821, 1881) 

leg__11 __ 21.0 (1970) ________ 20.3 (1925) _________10.2 (1998) _______ 8.0 (1777)

v2.0_11 __ 21.0 (1970) ________ 20.4 (1925) _________10.1 (1998) _______ 8.0 (1777)

leg__12 __ 20.8 (2006)a_______ 20.1 (1989)***______10.0 (2011) _______ 8.6 (1841)

v2.0_12 __ 21.7 (2023)a_______ 20.1 (1989)***_______9.9 (2011) _______ 8.6 (1841)

leg__13 __ 20.5 (1989)a_______ 20.5 (1818&1989) ___ 9.6 (1978) ______ 8.5 (1901)

v2.0_13 __ 20.9 (2023)a_____ 20.5 (1818) (1989 20.4)__9.5 (1978) ______ 8.6 (1801)^

leg__14 __ 19.1 (2004) ________ 19.4 (1814) __________ 9.8 (1956) _______ 7.9 (1903)

v2.0_14 __ 19.0 (2004) ________ 19.4 (1814) __________ 9.9 (1956) _______ 8.3 (1903)

leg__15 __ 18.6 (1957) ________ 22.9 (1858) __________ 9.2 (1971) _______ 8.1 (1850)

v2.0_15 __ 18.7 (1957) ________ 22.7 (1858) __________ 9.1 (1971) _______ 8.1 (1850)

leg__16 __ 20.1 (1957) _______ 20.7 (1858&1896) ___ 10.5 (1987) _______ 9.6 (1869)

v2.0_16 __ 20.1 (1957) _______ 20.7 (1858&1896) ___ 10.4 (1987) _______ 9.7 (1869)

leg__17 __ 20.2 (1957) _______ 21.4 (1917) __________ 10.1 (1977) _______ 9.1 (1928)

v2.0_17 __ 20.1 (1957) _______ 21.3 (1917) ___________9.9 (1977) _______ 9.3 (1928)

leg__18 __ 21.2 (2005) _______ 21.1 (2000)**** ______ 9.9 (1991) _______ 8.1 (1855)

v2.0_18 __ 22.2 (2005) _______ 20.9 (2000)**** ______ 9.7 (1991) _______ 8.2 (1855)

leg__19 __ 22.1 (2005) _______ 21.5 (2000)**** _____ 10.0 (2004) _______ 7.3 (1795) 

v2.0_19 __ 23.2 (2005) _______ 21.3 (2000)**** ______ 9.9 (2004) _______ 7.3 (1795) 

leg__20 __ 20.8 (2017) _______ 21.7 (1846) ___________ 9.0 (1964) _______ 9.0 (1795&1964) 

v2.0_20 __ 20.7 (2017) _______ 21.7 (1846) ___________ 9.0 (1964) _______ 9.0 (1795&1964) 

leg__21 __ 22.1 (1941) _______ 22.7 (1817) __________ 11.0 (1964) _______ 9.8 (1903) 

v2.0_21 __ 22.2 (1941) _______ 22.7 (1817) __________ 11.0 (1964) _______ 9.3 (1903) 

both_22___22.3 (1941) _______ 22.0 (1846) __________ 11.4 (1980) _______ 9.0 (1823)

leg__23 __ 20.7 (1976) _______ 21.8 (1935)  also 21.6 _10.2 (1980) ______ 9.4 (1823)

v2.0_23 __ 20.6 (1976) _______ 21.8 (1935) _in 1844__10.3 (1980) ______ 9.4 (1823)

leg__24 __ 21.5 (2020) _______ 22.0 (1935) ___________10.9 (1978) _______10.1 (1784)

v2.0_24 __ 21.5 (2020) _______ 22.1 (1935) __________ 10.7 (1978) _______10.1 (1784)

leg__25 __ 22.6 (2020) _______ 21.6 (1935) ___________11.1 (1958) _______ 8.7 (1835)

v2.0_25 __ 22.6 (2020) _______ 21.6 (1935) ___________11.0 (1958) _______ 8.7 (1835)

leg__26 __ 22.3 (1976) _______ 21.8 (1878) ___________10.7 (1997) _______ 9.7 (1835)

v2.0_26 __ 22.2 (1976) _______ 21.2 (1878) ___________10.6 (1997) _______ 9.7 (1835)

leg__27 __ 22.5 (1976) _______ 22.8 (1826)^___________10.4 (1981)_______10.2 (1862)

v2.0_27 __ 22.4 (1976) _______ 22.8 (1826)^___________10.3 (1981)_____10.3 (1835,62,1981)

leg__28 __ 22.6 (1976) _______ 21.9 (1820) ___________ 10.2 (1981) _______ 9.4 (1812)

v2.0_28 __ 22.5 (1976) _______ 21.9 (1820) ___________ 10.1 (1981) _______ 9.4 (1812)

leg__29 __ 22.4 (1976) _______ 21.4 (1798) ___________ 11.4 (1972) _______ 9.7 (1839)

v2.0_29 __ 22.3 (1976) _______ 21.4 (1798) ___________ 11.4 (1972) _______ 9.7 (1839)

leg__30 __ 22.1 (1976) _______ 21.0 (1914) ___________ 11.2 (1954) _______ 9.1 (1839)

v2.0_30 __ 22.0 (1976) _______ 21.0 (1914) ___________ 11.3 (1954) _______ 9.1 (1839)

___________________________________________

* 06 June -- as the previous record also in the recent interval, maximum was 20.7 (1846) until 1942. 

^ 08 June -- 1914 (8.3) moved out of a tie, it had a decrease from 8.6 but 1881 went even lower from 8.6 to 8.2. 

**09 June -- as the previous record also in the recent interval, maximum was 20.1 (1822) until 1940.

***12 June --as the previous record also in the recent interval, maximum was 19.5 (1846) until 1989. 

a 12-13 June 2023 have higher values in v2.0, with the CET legacy set terminated. 12 June was 21.7 which replaces 20.8 (2006) in v2.0. 13 June was 20.9 replacing record 20.5 1818 (2.0) and recent 1989 (now 20.4 in v2.0).  14 June (17.8) did not displace any values (see high max for new record). . . 

^ 13 June 1801 (unrevised 8.6) took a record away from 1901 which went from 8.5 to 8.8 in v2.0.

****18-19 June -- records before 2000 were 20.5 (1893) on 18th (also in v2.0), and 20.4 (1846) on 19th (also v2.0). 

^ 27 June -- 22.7 in 1878 also beat out 1976 in legacy, but was reduced to 22.4 in v2.0.

 

Edited February 6 by Roger J Smith

[Roger J Smith]

JULY

Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark

 

leg__01 __ 24.6 (2015) _______ 22.9 (1976)*______12.2 (1980) ________ 10.4 (1773)

v2.0_01 __ 24.7 (2015) _______ 22.8 (1976)*______12.1 (1980) ________ 10.4 (1773)

leg__02 __ 22.8 (1976) _______ 20.8 (1803) _______12.4 (1974&2013) __ 11.3 (1821) 

v2.0_02 __ 22.7 (1976) _______ 20.8 (1803) _______12.2 (1974) (12.5 2013) _11.3 (1821) 

leg__03 __ 24.6 (1976) _______ 21.4 (1937) _______11.5 (1988) _______ 10.1 (1907)

v2.0_03 __ 24.4 (1976) _______ 21.4 (1937) _______11.4 (1988) _______ 10.1 (1907)

leg__04 __ 24.7 (1976) _______ 21.8 (1826) _______10.0 (1965) _______ 10.8 (1813)

v2.0_04 __ 24.5 (1976) _______ 21.8 (1826) _______10.0 (1965) _______ 10.8 (1813)

leg__05 __ 23.9 (1976) _______ 24.0 (1852) _______11.4 (1954) _______ 10.7 (1920)

v2.0_05 __ 23.8 (1976) _______ 24.0 (1852) _______11.4 (1954) _______ 11.2 (1816,1920)

leg__06 __ 23.3 (1976) _______ 23.1 (1852) _______11.6 (1954) _______ 11.3 (1877)

v2.0_06 __ 23.2 (1976) _______ 23.1 (1852) _______11.6 (1954) _______ 11.3 (1877) 

leg__07 __ 22.6 (1976) _______ 22.6 (1923&1976) __11.7 (1954) _____ 11.1 (1877) 

v2.0_07 __ 22.5 (1976) _______ 22.7 (1923) ________11.6 (1954) _______ 11.1 (1877) 

leg__08 __ 21.4 (1976) _______ 21.4 (1870&1976) __12.1 (1943&1965) __ 10.6 (1823)

v2.0_08 __ 21.2 (1976) _______ 21.4 (1870) ________12.1 (1965) (12.2 1943) _ 10.6 (1823)

leg__09 __ 20.6 (1983) _______ 21.6 (1921) _______11.4 (1948) _______ 11.0 (1856)

v2.0_09 __ 20.6 (1983) _______ 21.6 (1921) _______11.4 (1948) _______ 11.0 (1856)

leg__10 __ 21.4 (1995) _______ 22.1 (1921) _______11.2 (1993) _______ 11.5 (1862&1907)

v2.0_10 __ 21.3 (1995) _______ 22.2 (1921) _______11.1 (1993) _______ 11.5 (1862) (12.11907)

leg__11 __ 22.0 (2005) _______ 22.6 (1783)^ ______11.2 (1993) ________9.4 (1888) 

v2.0_11 __ 21.6 (2005) _______ 22.6 (1783)^ ______11.1 (1993) ________9.0 (1888) 

leg__12 __ 22.6 (1983) _______ 23.7 (1923) _______11.9 (1993) _______ 11.0 (1840)

v2.0_12 __ 22.6 (1983) _______ 23.6 (1923) _______11.8 (1993) _______ 11.0 (1840)

leg__13 __ 22.7 (1983) _______ 24.5 (1808)^_______11.3 (1993) _______ 10.2 (1840)

v2.0_13 __ 22.6 (1983) _______ 24.5 (1808)^_______11.2 (1993) _______ 10.2 (1840)

leg__14 __ 22.1 (1983) _______ 24.4 (1808) ________11.7 (1961) _______ 12.6 (1883&1903)

v2.0_14 __ 22.0 (1983) _______ 24.4 (1808) ________11.7 (1961) _______ 12.6 (1883&1903)

leg__15 __ 22.6 (2003) _______ 23.7 (1825) ________12.2 (1980) _______ 11.5 (1883) 

v2.0_15 __ 22.4 (2003) _______ 23.7 (1825) ________12.1 (1980) _______ 11.4 (1883) 

leg__16 __ 22.7 (2003) _______ 22.5 (1983)**______12.8 (1946,61,65) __ 11.5 (1823) 

v2.0_16 __ 22.5 (2003) _______ 22.4 (1983)**______12.7 (1946,61) (12.8 1965)__11.5 (1823) 

leg__17 __ 21.2 (1983)a_______ 22.3 (1834) _______11.3 (1946) _______ 11.0 (1892)

v2.0_17 __ 21.9 (2022)a_______ 22.3 (1834) _______11.3 (1946) _______ 11.2 (1892)

leg__18 __ 22.1 (2006)a_______ 23.3 (1825) _______12.0 (1971) _______ 10.1 (1863) 

v2.0_18 __ 24.4 (2022)a_______ 23.3 (1825) _______12.0 (1971) _______ 10.1 (1863) 

leg__19 __ 24.5 (2006)a_______ 23.5 (1825) _______13.7 (1974&2001) __ 10.6 (1892) 

v2.0_19 __ 28.1 (2022)a_______ 23.5 (1825) _____13.5 (1974) (13.8 2001)__10.6 (1892)

leg__20 __ 23.5 (2016) ________ 22.9 (1878) _______12.6 (1970) ________ 8.7 (1836)

v2.0_20 __ 23.6 (2016) ________ 22.9 (1878) _______12.6 (1970) ________ 8.7 (1836)

leg__21 __ 22.7 (1989) ________ 23.1 (1868) _______12.8 (1970) _______ 11.3 (1902)

v2.0_21 __ 22.6 (1989) ________ 23.1 (1868) _______12.8 (1970) _______ 11.3 (1902)

leg__22 __ 23.1 (1989) ________ 23.2 (1868) _______12.6 (1970) _______ 11.5 (1902)

v2.0_22 __ 23.0 (1989) ________ 23.1 (1868) _______12.6 (1970) _______ 11.4 (1902)

leg__23 __ 22.5 (2019)^________ 22.4 (1989) ______ 12.6 (1958&1973) ___ 10.1 (1843)

v2.0_23 __ 22.6 (2019)^________ 22.3 (1989) ______12.6 (1973) (12.7 1958)_ 10.1 (1843)

leg__24 __ 22.1 (1989) ________ 23.9 (1818) _______12.3 (1973) _______ 11.1 (1843) 

v2.0_24 __ 22.0 (1989) ________ 23.9 (1818) _______12.3 (1973) _______ 11.1 (1843) 

leg__25 __ 25.2 (2019)^________ 22.7 (2006) _______12.9 (1966) _______ 10.9 (1920) 

v2.0_25 __ 25.3 (2019)^________ 22.8 (2006) _______12.9 (1966) _______ 11.2 (1920) 

leg__26 __ 23.2 (2006) ________ 21.3 (1948.)***_____12.6 (1962) _______ 11.0 (1884)

v2.0_26 __ 23.3 (2006) ________ 21.4 (1948.)***_____12.6 (1962) _______ 11.0 (1884)

leg__27 __ 22.5 (2018.) _______ 21.9 (1948.)***______13.7 (1954) _______10.6 (1867)

v2.0_27 __ 22.7 (2018.) _______ 21.9 (1948.)***______13.7 (1954) _______10.6 (1867)

leg__28 __ 23.7 (1948) ________ 22.0 (1814) _______13.0 (1952&1954) __ 11.8 (1886&1891) 

v2.0_28 __ 23.7 (1948) ________ 22.0 (1814) _______13.0 (1952) (13.1 1954) __11.6 (1886) (12.0 1891) 

leg__29 __ 25.2 (1948) ________ 23.4 (1911) _________12.8 (2015) _______ 11.0 (1816) 

v2.0_29 __ 25.1 (1948) ________ 23.2 (1911) _________12.9 (2015) _______ 11.0 (1816) 

leg__30 __ 23.1 (1948) ________ 22.5 (1830) _________12.4 (1986) _______ 10.6 (1786) 

v2.0_30 __ 23.1 (1948) ________ 22.5 (1830) _________12.3 (1986) _______ 10.6 (1786) 

leg__31 __ 23.7 (2020) _______ 23.4 (1943)*$______12.5 (1956&1965) __ 10.9 (1841) 

v2.0_31 __ 23.8 (2020) _______ 23.4 (1943)*$______12.4 (1956) (12.5 1965) __ 10.9 (1841) 

a Notes: 17-19 July had higher values in v2.0, with the CET legacy set terminated. 17 July was 21.9 which would only apply to the recent interval. (1983 went down to 21.1). .. 18 July (24.4) and 19 July (28.1) would apply to both recent and all-time records, so that 18 July 1825 and 19 July 2006 are no longer all-time daily records. 19 July 2006 in v2.0 increased to 24.6. It is now the highest value not to be a record (in v2.0). 

Other notes follow __________________________________________

* 1st _ As the previous record also in the recent interval, previously 22.5 (leg and v2.0, 1952) also in recent interval, warmest before 1952 was 20.8 in 1781. Note also, 22.5 (leg) was hit again in 2009 (but not a record by then). It was 22.6 in v2.0. 

^11th _ Also 22.4 (leg) in 1923, and 22.5 in v2.0.

^13th _ Also 24.0 (leg) in 1923, also 24.0 in v2.0. 

**16th _ As the previous record also in the recent interval, warmest before 1983 was 22.2 (1793 and 1868) in leg and v2.0.

^23rd _ As the previous record also in the recent interval (22.4, 1989) the warmest before that was 21.3 (1900). 

^25th _ As the previous record also in the recent interval (22.7, 2006) the warmest before that was 22.0 (1872).

***26th _ As the previous record also in the recent interval, warmest before 1948 was 21.1 (1830 and 1885).

***27th_ As the previous record also in the recent interval, warmest before 1948 was 21.6 (1933 tied in 1947). 

*$ 31st _ As the previous record also in the recent interval, warmest before 1943 was 21.8 (1819). 

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

AUGUST

Date __ Record Max since 1940 __  previous mark ______ Record Min since 1940__previous mark

leg__01 __ 24.9 (1995) _______22.0 (1825) _______12.4 (1966) ________ 11.9 (1888)

v2.0_01 __ 24.8 (1995) _______22.0 (1825) _______12.4 (1966) ________ 11.9 (1888&1907)

leg__02 __ 24.6 (1995) _______23.9 (1990)*_______12.4 (1966) ________ 11.6 (1822)

v2.0_02 __ 24.6 (1995) _______23.9 (1990)*_______12.4 (1966) ________ 10.9 (1912)

leg__03 __ 24.4 (1990) _______22.0 (1975)**______12.3 (1958) ________ 10.5 (1912)

v2.0_03 __ 24.4 (1990) _______22.0 (1975)**______12.4 (1958) ________ 10.8 (1912)

both_04__ 23.4 (1975) _______22.2 (1933) ________12.6 (1967) ________ 11.3 (1812)

both_05__ 23.1 (2003) _______22.5 (1868) ________11.9 (1956) ________ 11.3 (1812) 

leg__06 __ 22.5 (2003) _______22.0 (1933) _______12.0 (1962&1987) __ 11.2 (1823&1860) 

v2.0_06 __ 22.5 (2003) _______22.0 (1933) _____12.0 (1987) (12.1 1962)__ 11.1 (1860) 

both_07 __22.8 (1975) _______20.2 (1933) _______11.8 (1962) ________ 11.6 (1898)

leg__08 __ 23.7 (1975) _______21.4 (1884) _______13.0 (1965) ________ 11.5 (1823)

v2.0_08 __ 23.8 (1975) _______21.4 (1884) _______13.0 (1965) ________ 11.5 (1823)

leg__09 __ 23.9 (2003) _______23.2 (1911) _______12.4 (1955) _________11.0 (1931)

v2.0_09 __ 23.9 (2003) _______22.5 (1911) _______12.4 (1955) _________10.9 (1931)

leg__10 __ 22.5 (1997) _______22.5 (1773&1997) __13.1 (1987) _______ 10.8 (1892)

v2.0_10 __ 22.6 (1997) _______(22.5 1773)^_______13.1 (1987) _______ 11.0 (1892)

leg__11 __ 24.0 (2020) _______22.6 (1997)^_______12.1 (1960) _______ 10.8 (1902)

v2.0_11 __ 24.2 (2020) _______22.6 (1997)^_______12.1 (1960) _______ 10.6 (1902)

leg__12 __ 25.1 (2020) _______22.2 (1911) ________12.4 (1940) _______ 10.5 (1912)

v2.0_12 __ 25.2 (2020) _______22.1 (1911) ________12.4 (1940) _______ 10.3 (1912)

leg__13 __ 20.6 (1997)a_______23.6 (1911) ________11.7 (1960) _______ 10.5 (1881)

v2.0_13 __ 23.4 (2022)a_______23.9 (1911) ________11.7 (1960) _______ 10.6 (1881)

leg__14 __ 20.5 (2001)a_______21.3 (1911) ________12.7 (1994) _______ 10.8 (1912)

v2.0_14 __ 23.6 (2022)a_______21.7 (1911) ________12.7 (1994) _______ 11.0 (1912)

leg__15 __ 21.0 (2001)a_______22.1 (1893) ________12.3 (1951) _______ 10.3 (1829)

v2.0_15 __ 21.4 (2022)a_______21.7 (1893) ________11.9 (1951) _______ 10.3 (1829)

leg__16 __ 21.6 (1947) _______21.0 (1876&1893) ___12.3 (1946) ________ 9.5 (1888.)

v2.0_16 __ 21.6 (1947) _______21.4 (1893) (20.9 1876)__12.3 (1946) _____ 9.9 (1810)^

both_17 __22.0 (1947) _______22.4 (1876) ________ 12.1 (1999) _______ 10.9 (1888.)

leg__18 __ 22.1 (1947) _______22.6 (1893) _________11.7 (1970) _______ 10.3 (1830)

v2.0_18 __ 22.1 (1947) _______22.0 (1893)^________11.7 (1970) _______ 10.3 (1830)

leg__19 __ 22.1 (1995,96,97) __22.8 (1932) ________12.0 (2014) _______ 10.4 (1839)

v2.0_19 __ 22.2 (1996,97) _____22.8 (1932) ________12.1 (2014) _______ 10.4 (1839)

leg__20 __ 21.9 (1995) _______21.0 (1959)***______ 10.9 (1964) _______ 10.5 (1920)

v2.0_20 __ 21.9 (1995) _______21.3 (1959)***______ 10.9 (1964) _______ 10.2 (1920)

leg__21 __ 21.6 (1984) _______21.4 (1959)***______ 11.0 (1986) ________ 9.8 (1850)

v2.0_21 __ 21.6 (1984) _______21.1 (1959)***______ 11.0 (1986) ________ 9.8 (1850)

leg__22 __ 22.1 (1955) _______21.1 (1898) _________12.3 (1999) _______ 10.4 (1817)

v2.0_22 __ 22.1 (1955) _______21.3 (1898) _________12.3 (1999) _______ 10.4 (1817)

leg__23 __ 22.1 (1955) _______21.1 (1857) _________11.2 (1993) _______ 10.3 (1877)

v2.0_23 __ 22.1 (1955) _______21.0 (1857) _________11.2 (1993) _______ 10.4 (1877) 

leg__24 __ 21.5 (1990) _______21.4 (1955)****_____11.5 (1966) ________ 9.1 (1864)

v2.0_24 __ 21.4 (1990) _______21.4 (1955)****_____11.5 (1966) ________ 9.1 (1864)

leg__25 __ 21.7 (2019) _______20.9 (1899) _________11.1 (1956) _____ 10.5 (1787,1843&64)

v2.0_25 __ 21.8 (2019) _______20.8 (1899) _________11.1 (1956) _____ 10.5 (1787,1843&64)

leg__26 __ 19.8 (1976) _______20.6 (1869) _________12.1 (1993) ________ 8.8 (1864) 

v2.0_26 __ 19.8 (1976) _______20.6 (1869) _________12.1 (1993) ________ 8.8 (1864) 

leg__27 __ 20.9 (1942) _______22.8 (1930) _________11.9 (1993) _______ 11.0 (1885&1890) 

v2.0_27 __ 21.0 (1942) _______23.1 (1930) _________11.9 (1993) _______ 11.1 (1785&1896)^ 

leg__28 __ 23.0 (1942) _______22.4 (1930) _________11.9 (1986) _______ 10.5 (1919)

v2.0_28 __ 23.0 (1942) _______22.3 (1930) _________11.9 (1986) _______ 10.1 (1912)^

leg__29 __ 21.6 (1961) _______22.6 (1930) _________11.5 (1956&1986) ___10.1 (1812)

v2.0_29 __ 21.6 (1961) _______22.2 (1930) _________11.5 (1986) (11.6 1956)__10.1 (1812)

leg__30 __ 19.8 (2008) _______19.8 (1804&2008) __11.0 (1956) _________ 9.5 (1890)

v2.0_30 __ 19.9 (2008) _______19.8 (1804) _________11.0 (1956) _________ 9.6 (1890)

leg__31 __ 20.9 (2005) _______21.3 (1906) _________10.4 (1978) _________ 9.2 (1833) 

v2.0_31 __ 21.3 (2005) _______20.8 (1906) _________10.3 (1978) _________ 9.2 (1833) 

NOTES: a 13th-15th Aug above, new recent records set in v2.0 include 23.4 13th (not an all-time record, 1911 retained), 23.6 14th (also all-time) and 21.4 15th (not an all-time record, 1893 retained, also 1876 was 21.5 on 15 Aug). 

Other notes follow: ___________________________

* 2nd _ as the previous record was in the recent interval, the record high to 1990 was 22.2 (1856). 

**3rd _ as the previous record was in the recent interval, the record high to 1975 was 21.3 (1856). 

^10th_ 1773 lost share of tie with 1997, when 1997 incr 22.5 to 22.6; 1773 remained 22.5. 2003 incr 22.4 (leg) to 22.5 (v2.0).

^11th_ as the previous record was in the recent interval (1997), the record high before 1997 was 22.5 (1884).

^16th_ 1810 gained record (9.9) when 1888 incr by 1.1 from 9.5 to 10.6.

^18th_ 1893 lost record when 22.6 decr to 22.0, 1947 remained 22.1 for the new record.

***20th _as the previous record was in the recent interval, the record high to 1959 was 20.5 leg, 20.6 v2.0 (1918).

***21st_as the previous record was in the recent interval, the record high to 1959 was 20.5 leg, 20.6 v2.0 (1918).

****24th_ as the previous record was in the recent interval, the record high to 1955 was 20.8 leg, 20.7 v2.0 (1857).

^ 27th_ 1785, 1896 (11.1) new tied pair replace 1885, 1890 which both increased, to 11.5 and 11.2.

^ 28th_ 1919 also decreased but only by 0.1 to 10.4 (1912 10.8 to 10.1 to gain record). 

 

Edited February 9 by Roger J Smith

[Roger J Smith]

SEPTEMBER

Date __ Record Max since 1940 ___  previous mark _______ Record Min since 1940 __ previous mark

leg__01 __ 19.7 (1984) ______  21.8 (1780&1906) _ 9.6 (1956) ________ 7.1 (1816)

v2.0_01 __ 19.7 (1984) ______  22.0 (1906) ________ 9.7 (1956) ________ 7.1 (1816)

leg__02 __ 21.4 (1961) _______ 22.6 (1906) ________11.3 (1957&1976) __7.6 (1816) 

v2.0_02 __ 21.4 (1961) _______ 22.3 (1906) ________(11.2 1976) (11.3 1957) __7.6 (1816) 

leg__03 __ 18.8 (1958&1991)_ 20.2 (1880) ________11.4 (2015) ________ 8.2 (1816&1908) 

v2.0_03 __ 18.8 (1958) (18.7 1991)_ 19.8 (1880) _____11.4 (2015) ________ 8.2 (1816) (8.3 1908)

leg__04 __ 20.4 (2005) _______ 20.7 (1880) ________10.6 (1993) ________ 7.7 (1841)

v2.0_04 __ 20.6 (2005) _______ 20.1 (1880) ________10.5 (1993) ________ 7.7 (1841)

leg__05 __ 22.4 (1949) _______ 19.8 (1898&1899) __ 9.8 (1952)  _______ 8.1 (1841) 

v2.0_05 __ 22.4 (1949) _______ 20.2 (1898) (19.4 1899)__9.8 (1952)  _____ 8.1 (1841) 

leg__06 __ 19.4 (2016)a_______ 20.8 (1898)a________ 8.6 (1952) _______ 8.5 (1841) 

v2.0_06 __ 21.1 (2023)a_______ 20.9 (1898)a________ 8.6 (1952) _______ 8.5 (1841) 

leg__07 __ 20.4 (2021)b_______ 21.1 (1868)b _______ 8.6 (1952) _______ 9.2 (1815)

v2.0_07 __ 23.3 (2023)b_______ 20.9 (1868)b _______ 8.1 (1952) _______ 9.2 (1815)

leg__08 __ 21.4 (2021)c _______ 21.3 (1898)c _______ 9.4 (1952) _______ 8.9 (1807&1931) 

v2.0_08 __ 22.0 (2023)c _______ 21.6 (1898)c _______ 9.4 (1952) _______ 8.8 (1931) 

leg__09 __ 18.7 (2021)d _______ 19.8 (1898)d _______9.5 (1965&1986) __ 9.2 (1860&1912)

v2.0_09 __ 22.8 (2023)d _______ 19.5 (1781,1898)d __9.4 (1986) (9.5 1965) __ 9.0 (1912) (9.2 1860)

leg__10 __ 19.1 (2011)e _______ 19.2 (1865)e _______ 9.2 (1972) _______ 8.6 (1860)

v2.0_10 __ 21.6 (2011)e _______ 19.1 1865,2011e ___ 9.2 (1972) _______ 8.6 (1860)

leg__11 __ 20.3 (1999) ________ 19.4 (1919) _________ 9.8 (1986) _______ 8.1 (1860) 

v2.0_11 __ 20.2 (1999) ________ 19.3 (1919) _________ 9.8 (1986) _______ 8.2 (1860) 

leg__12 __ 20.4 (1945) ________ 19.5 (1865) _________10.5 (1986) _______ 8.1 (1848) 

v2.0_12 __ 20.3 (1945) ________ 19.4 (1865) _________10.5 (1986) _______ 8.1 (1848) 

leg__13 __ 20.7 (2016) ________ 19.4 (2006)*_________ 9.2 (1986) _______ 6.7 (1807)

v2.0_13 __ 20.7 (2016) ________ 19.4 (2006)*_________ 9.1 (1986) _______ 6.7 (1807)

leg__14 __ 21.3 (2016) _________ 19.3 (1934) _________ 9.1 (1975) _______ 6.7 (1807)

v2.0_14 __ 21.3 (2016) _________ 19.3 (1934) _________ 8.9 (1975) _______ 6.7 (1807) 

leg__15 __ 20.1 (2020)  _________18.8 (1947&2016) __ 7.9 (1986) _______ 8.0 (1903) 

v2.0_15 __ 20.1 (2020)  _________18.9 (1947&2016) __ 7.9 (1986) _______ 8.1 (1903) 

leg__16 __ 19.6 (1961) _________ 19.1 (1898) _________ 8.7 (1986) _______ 8.1 (1807) 

v2.0_16 __ 19.6 (1961) _________ 18.9 (1865&1898) __ 8.7 (1986) _______ 8.1 (1807&1903) 

leg__17 __ 18.3 (1945) _________ 20.4 (1898) __________ 8.9 (1986) _______ 8.1 (1807) 

v2.0_17 __ 18.3 (1945) _________ 20.1 (1898) __________ 8.9 (1986) _______ 8.1 (1807) 

leg__18 __ 18.8 (1982) _________ 19.7 (1926) __________ 7.0 (1952)_______ 6.9 (1807) 

v2.0_18 __ 18.7 (1982) _________ 19.8 (1926) __________ 7.1 (1952)_______ 6.9 (1807) 

leg__19 __ 18.3 (1961) _________ 20.9 (1926) __________ 7.4 (1952)_______ 7.8 (1820) 

v2.0_19 __ 18.3 (1961) _________ 20.9 (1926) __________ 7.3 (1952)_______ 7.8 (1820) 

leg__20 __ 18.4 (1947) ________ 17.8 (1795&1865) _____ 7.9 (1952)_______ 6.8 (1919)

v2.0_20 __ 18.4 (1947) ________ 17.8 (1795) (17.7 1865) __ 7.8 (1952)_______ 6.9 (1919)

leg__21 __ 21.4 (2006) _________ 17.6 (1989)**_________ 7.9 (1948) _______ 6.5 (1872)

v2.0_21 __ 21.4 (2006) _________ 17.6 (1989)**_________ 7.9 (1948) _______ 6.7 (1836&1872)

leg__22 __ 18.7 (1956) _________ 16.9 (1900) ___________ 6.9 (1948) _______ 6.3 (1872)

v2.0_22 __ 18.7 (1956) _________ 16.8 (1900) ___________ 7.0 (1948) _______ 6.6 (1872)

leg__23 __ 18.3 (1956) _________ 17.3 (1938) ___________ 9.0 (2012) _______ 6.0 (1773)

v2.0_23 __ 18.3 (1956) _________ 17.4 (1938) ___________ 9.0 (2012) _______ 6.0 (1773)

leg__24 __ 18.3 (2006) _________ 18.0 (1895) ___________ 8.6 (2018.)_______ 6.7 (1872)

v2.0_24 __ 18.3 (2006) _________ 18.5 (1895) ___________ 8.6 (2018.)_______ 6.7 (1872)

leg__25 __ 17.7 (1949) _________ 19.4 (1895) ___________ 8.1 (2010) _______ 7.4 (1812) 

v2.0_25 __ 17.8 (1949) _________ 19.2 (1895) ___________ 8.1 (2010) _______ 7.4 (1812) 

leg__26 __ 17.7 (1946) _________ 18.4 (1895) ___________ 8.6 (1943) _______ 6.0 (1885)

v2.0_26 __ 17.7 (1946) _________ 18.4 (1895) ___________ 8.6 (1943) _______ 6.0 (1885)

leg__27 __ 18.3 (1941) _________ 19.0 (1895) ___________ 7.7 (1987) _______ 6.1 (1824&1885) 

v2.0_27 __ 18.3 (1941) _________ 19.7 (1895) ___________ 7.7 (1987) _______ 6.0 (1885) 

leg__28 __ 18.9 (2011) _________ 18.5 (1970)***________ 7.5 (1974) _______ 4.9 (1824) 

v2.0_28 __ 18.9 (2011) _________ 18.5 (1970)***________ 7.4 (1974) _______ 4.9 (1824) 

leg__29 __ 19.7 (2011) _________ 19.2 (1908) ___________ 7.0 (1974) _______ 5.5 (1918)

v2.0_29 __ 19.7 (2011) _________ 19.0 (1908) ___________ 6.8 (1974) _______ 5.4 (1918)

leg__30 __ 20.0 (2011) _________ 19.6 (1908) ___________ 7.2 (1957) _______ 6.3 (1808)

v2.0_30 __ 20.0 (2011) _________ 19.5 (1908) ___________ 7.2 (1957) _______ 6.3 (1808)

_______________________________________________

6th_  a: 2023 (21.1 in v2.0) broke both of these, 1898 had increased to 20.9 in v2.0. 

7th_  b: 2023 (23.3 in v2.0) broke both of these, 1868 had decreased to 20.9 in v2.0. 

8th_  c .. 2023 (22.0 in v2.0) broke both of these, 1898 had replaced 2021 in v2.0 (21.6 to 21.4)

9th_  d: 2023 (22.8 in v2.0) broke both of these, 1781 had joined 1898 as tied at 19.5 in v2.0. 

10th_ e: 2023 (21.6 in v2.0) broke both of these, 2011 had joined 1865 as tied at 19.1 in v2.0. 

* 13th _  as the previous record also in the recent interval, 19.3 in 1804 was warmest before 2006.

* 15th _ as the previous record tied in recent interval, 18.7 in 1865 was warmest before 1947. 

**21st _ as the previous record also in the recent interval, the original record from 1825 (16.4) was broken first in 1976 (17.0) and that was broken in 1987 (17.5) before the 1989 mark. In v2.0, all same except 1976 (16.9).

***28th _ as the previous record also in the recent interval, the warmest before 1970 was 18.1 (leg) (1895) (18.4 v2.0)

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

OCTOBER

Date __ Record Max since 1940 __  previous mark _____ Record Min since 1940 __ previous mark

leg__01 __ 20.2 (1985)^ ______ 18.1 (1908.) _______ 7.2 (1974) _______ 6.1 (1808&1888) 

v2.0_01 __ 20.1 (1985)^______ 18.1 (1908.) _______ 7.0 (1974) _______ 6.1 (1808&1888) 

leg__02 __ 17.9 (2011) _______ 17.6 (1959)*_______ 7.4 (1944) _______ 3.6 (1817) 

v2.0_02 __ 17.7 (1959&2011) _ 17.1 (1908) ________7.4 (1944) _______ 3.6 (1817&1888) 

leg__03 __ 19.8 (2011) _______ 17.8 (1959)*_______ 7.7 (1981) _______ 4.7 (1817) 

v2.0_03 __ 19.7 (2011) _______ 17.8 (1959)*_______ 7.4 (1981) _______ 4.7 (1817) 

leg__04 __ 17.7 (1959) _______ 17.6 (1886) _______ 5.7 (1994) _______ 5.1 (1912) 

v2.0_04 __ 17.7 (1959) _______ 17.8 (1886) _______ 5.5 (1994) _______ 5.0 (1880)^ 

leg__05 __ 17.2 (1959) _______ 17.9 (1886) _______ 7.1 (1999) _______ 4.6 (1888) 

v2.0_05 __ 17.2 (1959) _______ 18.1 (1921)^ ______ 7.0 (1999) _______ 4.6 (1888) 

leg__06 __ 16.6 (1941) _______ 19.0 (1921) _______ 7.5 (1956) _______ 4.1 (1888)

v2.0_06 __ 16.7 (1941) _______ 18.9 (1921) _______ 7.5 (1956) _______ 4.1 (1888)

leg__07 __ 16.1 (1965)a_______ 16.9 (1921)a______ 7.3 (1974) _______ 3.5 (1829)

v2.0_07 __ 17.5 (2023)a_______ 16.8 (1921)a______ 7.1 (1974) _______ 3.5 (1829)

leg__08 __ 17.7 (1995) _______ 17.1 (1921) _______ 7.1 (1990) _______ 4.1 (1829)

v2.0_08 __ 17.5 (1995) _______ 16.9 (1921) _______ 6.9 (1990) _______ 4.1 (1829)

leg__09 __ 17.5 (1995) _______ 17.3 (1979)**_____ 6.5 (1964) _______ 3.3 (1852) 

v2.0_09 __ 17.3 (1995) _______ 17.1 (1979)**_____ 6.5 (1964) _______ 3.3 (1852) 

leg__10 __ 16.2 (2011) _______17.8 (1921) _______ 4.8 (1980) _______ 3.5 (1814) 

v2.0_10 __ 16.1 (2011) _______17.8 (1921) _______ 4.5 (1980) _______ 3.5 (1814) 

leg__11 __ 17.6 (1978.)_______ 17.4 (1921) _______ 4.9 (1952) _______ 3.9 (1860)

v2.0_11 __ 17.7 (2005) _____ 17.4 (1978) 17.1 (1921)_ 5.0 (1952) _______ 4.0 (1860)

leg__12 __ 16.5 (1978.)_______ 16.0 (1869) _______ 5.7 (1952) _______ 3.2 (1887) 

v2.0_12 __ 16.3 (1978.)_______ 15.8 (1869) _______ 5.6 (1952) _______ 3.0 (1887) 

leg__13 __ 18.5 (2018.)_______ 16.8 (1990)*** ____ 5.2 (1960) _______ 2.2 (1838.)

v2.0_13 __ 18.4 (2018.)_______ 16.7 (1990)*** ____ 5.2 (1960) _______ 2.2 (1838.)

leg__14 __ 17.2 (2017) _______ 16.1 (1990)*** ____ 6.1 (1971) _______ 3.1 (1838.)

v2.0_14 __ 17.1 (2017) _______ 15.9 (1990)*** ____ 6.2 (1971) _______ 3.1 (1838.)

leg__15 __ 15.6 (1949) _______ 15.7 (1930) _______ 4.8 (1993) _______ 2.5 (1843)

v2.0_15 __ 15.6 (1949) _______ 15.8 (1930) _______ 4.7 (1993) _______ 2.5 (1843)

leg__16 __ 16.4 (2017) _______ 15.8 (1818.)_______ 2.7 (1993) _______ 1.8 (1843) 

v2.0_16 __ 16.3 (2017) _______ 15.8 (1818.)_______ 2.6 (1993) _______ 1.8 (1843) 

leg__17 __ 15.5 (1954) _______ 15.6 (1897) _______ 4.1 (1992&1993) __ 2.5 (1824) 

v2.0_17 __ 15.4 (1954) _______ 15.5 (1897) _______ 3.9 (1992) (4.01993) __ 2.5 (1824) 

leg__18 __ 16.7 (2014) _______ 16.0 (1954)**______ 4.5 (1955) _______ 2.4 (1843)

v2.0_18 __ 16.5 (2014) _______ 16.1 (1954)**______ 4.4 (1955) _______ 2.4 (1843)

leg__19 __ 15.8 (2014) _______ 16.3 (1921) _______ 4.6 (1993) _______ 1.5 (1813)

v2.0_19 __ 15.6 (2014) _______ 16.0 (1921) _______ 4.6 (1993) _______ 1.5 (1813)

leg__20 __ 14.2 (1977) _______ 14.9 (1795) _______ 4.9 (2010) _______ 2.1 (1842) 

v2.0_20 __ 14.0 (1977) _______ 14.9 (1795) _______ 4.9 (2010) _______ 2.1 (1842) 

leg__21 __ 15.2 (1977) _______ 15.1 (1826) _______ 3.6 (2003) _______ 1.2 (1842)

v2.0_21 __ 15.0 (1977) _______ 15.1 (1826) _______ 3.6 (2003) _______ 1.2 (1842)

leg__22 __ 15.6 (1971) _______ 16.2 (1906) _______ 4.3 (1951) _______ 2.5 (1931) 

v2.0_22 __ 15.6 (1971) _______ 16.1 (1906) _______ 4.3 (1951) _______ 2.5 (1931) 

leg__23 __ 14.4 (1998)a______ 13.9 (1942&1971)^__2.8 (1951) _____ 0.9 (1859) 

v2.0_23 __ 14.8 (2022)a______ 14.2 (1998) ^ _______ 2.8 (1951) _____ 1.0 (1859) 

leg__24 __ 14.3 (2009) _______ 14.1 (1861&1995) __ 4.5 (1951) ______ 0.6 (1859)

v2.0_24 __ 14.2 (2009) _______ 14.1 (1861) (14.0 1995)_ 4.6 (1951) ____ 0.7 (1859)

leg__25 __ 14.0 (1978&2013)__13.5 (1779) ________ 3.6 (1946) ______ 2.0 (1784)

v2.0_25 __ 13.9 (2013) ________ 13.8 (1978) (13.5 1779)_ 3.6 (1946) __ 2.0 (1784)

leg__26 __ 14.3a (1988&2013) _ 14.7a (1927) ______ 4.3 (1948) ______ 1.5 (1785)

v2.0_26 __ 15.0a (2022) ______ 14.9 (1927) ________ 4.3 (1948) ______ 1.2 (1895)

leg__27 __ 15.9 (2005) _______ 16.7 (1888) _________ 2.5 (1948) ______ 1.4 (1869) 

v2.0_27 __ 16.2 (2005) _______ 16.6 (1888) _________ 2.5 (1948) ______ 1.6 (1778&1869) 

leg__28 __ 15.0a (2005&2014) _15.6a (1888) ________2.7 (1950) _______ 0.9 (1895)

v2.0_28 __ 15.4a (2022) ______15.4a (1888) ________ 2.6 (1950) _______1.2 (1895)

leg__29 __ 14.0a (1984) ______14.0a (1772&1984) __ 1.6 (2008) _____  0.3 (1895) 

v2.0_29 __ 14.9a (2022) ______14.1 (2005) (14.0 1772)^__1.4 (2008) ____ 0.3 (1895) 

leg__30 __ 15.5 (2005) _______ 14.3 (1772) _________ 3.5 (1988) _______ 0.7 (1836) 

v2.0_30 __ 15.5 (2005) _______ 14.3 (1772) _________ 3.3 (1988) _______ 0.7 (1836) 

leg__31 __ 16.9 (2014) _______ 14.5 (1772) _________ 1.8 (1955) _______ 0.7 (1836)

v2.0_31 __ 16.7 (2014) _______ 14.5 (1772) _________ 1.8 (1955) _______ 0.7 (1836)

NOTES: a _ recent v2.0 record-breakers (since CET legacy ended Apr 2022)

7 Oct _ 2023 (17.5) broke both of these. 

23rd new record high of 14.8 in 2022 (v2.0) replaces 1998 as daily and recent high.

26th new record high of 15.0 in 2022 (v2.0) replaces both daily (1927) and recent (1988, 2013) highs.

28th new record high of 15.4 in 2022 (v2.0) ties 1888 v2.0, but not the legacy value. It breaks the recent marks though.

29th new record high of 14.9 in 2022 (v2.0) replaces both daily and recent marks. 2005 (14.1 v2.0) replaced tied 1772, 1984 before 2022. 1984 decr to 13.9 (v2.0).

Other notes follow: ___________________________

^ 1 Oct _ 1985 retains monthly maximum (now 20.1, was 20.2) as 2011 Oct 1 also drops 0.1 (20.1 to 20.0).

* 2 Oct _ as the previous legacy record also in the recent interval (1959), 17.2 in 1908 was record high before 1959.

* 3 Oct _ as the previous record also in the recent interval (1959), 16.9 (leg) (16.8 v2.0) in 1908 was record high before 1959.

^ 4 Oct _ 1880 gains a record with decr 5.3 to 5.0, 1912 loses (remains 5.1). 

^ 5 Oct _ 1921 gains a record with incr 17.7 to 18.1 (1886 17.9 to 18.0 lost record).

**9th _ as the previous record also in the recent interval, 17.0 (leg) (16.9 v2.0) in 1921 was warmest before 1979. 

***13th-14th _ as the previous records also in the recent interval, 16.2 (leg, 16.1 v2.0) (1861) and 15.5 (1818) were records until 1990. The second of these (15.5, 1818) was tied in 1969 (leg and v2.0) before both were removed in 1990 (its own records eclipsed in 2018 and 2017).

** 18th _ as the previous records also in the recent interval (1954), previous record was 15.1 (1871 leg), (15.1, 1871 t1904 v2.0)

^ 23rd _ as the previous record also in the recent interval, 13.2 in 1853 was the highest value until 1942. (leg CET). In v2.0, 1971 was 13.9 and 1942 was 13.8. 1853 was also 13.2 in v2.0. 

 

 

Edited February 11 by Roger J Smith
notes for 6-10 Sep 2023 and 7 Oct

[Roger J Smith]

NOVEMBER

Date __ Record Max since 1940 __  previous mark _________ Record Min since 1940 __ previous mark

leg__01 __ 13.5 (1982) _______ 13.5 (1894&1982) ___ 2.8 (1955) _________ 1.5 (1934) (1.6 1926)

v2.0_01 __ 13.2 (1982) _______ 13.7 (1894) __________ 2.8 (1955) _________1.1 (1926) (1.5 1934)

leg__02 __ 13.2 (1981&2007)__14.3 (1821)^ _________3.6 (1941) _________+0.5 (1880)

v2.0_02 __ 13.2 (2005&2007)^__14.3 (1821)^ _________3.6 (1941) _________+0.4 (1880)

leg__03 __ 15.0 (1996) ________ 14.6 (1927) _________ 2.1 (1980) _________ 1.9 (1820)

v2.0_03 __ 14.9 (1996) ________ 14.4 (1927) _________ 1.8 (1980) _________ 1.9 (1820)

leg__04 __ 14.2 (1946) ________ 13.6 (1931) _________ 2.5 (1942) _________+0.8 (1845&1848.)

v2.0_04 __ 14.2 (1946) ________ 13.6 (1931) _________ 2.5 (1942) _________+0.8 (1845&1848.)

leg__05 __ 13.6 (2010) ________ 15.4 (1938.) ________ 2.6 (1988) _________+0.8 (1801)

v2.0_05 __ 13.6 (2010) ________ 15.5 (1938.) ________ 2.4 (1988) _________+0.8 (1801&1901)

leg__06 __ 14.3 (2015) ________ 13.4 (1772) _________ 3.6 (2016) _________+0.6 (1868.) 

v2.0_06 __ 14.2 (2015) ________ 13.4 (1772) _________ 3.6 (2016) _________+0.7 (1868.) 

leg__07 __ 13.8 (2015) ________ 13.4 (1772) _________ 3.4 (1957) _________--0.6 (1791)

v2.0_07 __ 13.7 (2015) ________ 13.4 (1772) _________ 3.4 (1957) _________--0.6 (1791)

leg__08 __ 12.6 (1983) ________ 13.4 (1852) _________ 1.3 (2016) _________--1.2 (1812) 

v2.0_08 __ 12.4 (1983) ________ 13.4 (1852) _________ 1.3 (2016) _________--1.2 (1812) 

leg__09 __ 12.5 (1998.) _______ 12.2 (1977)*_________ 1.8 (1968.)_________--0.5 (1921)

v2.0_09 __ 12.3 (1998.) _______ 11.9 (1977)*_________ 1.2 (1968.)_________+0.2 (1921)

leg__10 __ 13.4 (1977) 13.3 2015 _12.2 (1772) _________ 2.0 (1964) _________+0.1 (1812)

v2.0_10 __ 13.2 (1977&2015) __12.2 (1772) _________ 2.0 (1964) _________+0.1 (1812)

leg__11 __ 13.9 (2015)a_______ 13.0 (2005)**_______ 2.8 (1958.)_________+0.3 (1828.)

v2.0_11 __ 14.3 (2022)a_______ 13.0 (2005)**_______ 2.8 (1958.)_________+0.3 (1828.)

leg__12 __ 13.8 (1947) _________ 13.8 (1938&1947) __ 1.5 (1959&1985) __--1.4 (1919)

v2.0_12 __ 13.8 (1947) _________ 13.8 (1938&1947) __1.3 (1985) (1.5 1959) _--1.5 (1919)

leg__13 __ 12.8 (1990) _________ 14.6 (1938.) ________ +0.2 (1979) _______ --1.1 (1862) 

v2.0_13 __ 12.6 (1990) _________ 14.7 (1938.) _________ 0.0 (1979) _______ --0.9 (1862) 

leg__14 __ 12.4 (1994) _________ 13.4 (1938.) ________+0.1 (1965) _______ --1.1 (1925)

v2.0_14 __ 12.3 (1994) _________ 13.4 (1938.) ________+0.1 (1965) _______ --1.0 (1925)

leg__15 __ 12.6 (1978.) _________ 13.5 (1821) _______--2.1 (1965) _______--0.5 (1786&1929)

v2.0_15 __ 12.4 (1978.) _________ 13.5 (1821) _______--2.1 (1965) _______--0.5 (1786) (+0.3 1929)

leg__16 __ 13.4 (1997) _________ 12.8 (1840) ________--0.8 (1965) ________ --2.9 (1901)

v2.0_16 __ 13.3 (1997) _________ 12.8 (1840) ________--0.7 (1965) ________ --2.3 (1901)

leg__17 __ 13.1 (1997) _________ 12.8 (1817) ________ 1.6 (1947&1972) ___ --2.0 (1841)

v2.0_17 __ 12.9 (1997) _________ 12.8 (1817) ________ 1.5 (1972) (1.6 1980) __--2.0 (1841)

leg__18 __ 12.8 (2020) _________ 12.2 (1978)^^ _____ +0.8 (1947) ________--1.6 (1887)

v2.0_18 __ 12.7 (2020) _________ 12.0 (1978)^^ _____ +0.8 (1947) ________--1.3 (1798&1871)^

leg__19 __ 12.7 (1994) _________ 12.4 (1978)***_____+0.7 (1962) ________ --2.1 (1815)

v2.0_19 __ 12.5 (1994&2003)^ __12.3 (1948)***_____+0.8 (1962) ________ --2.1 (1815)

leg__20 __ 12.8 (2009) _________ 12.6 (1994)****___ --0.3 (1962) ________ --1.2 (1829)

v2.0_20 __ 12.7 (2009) _________ 12.4 (1994)****___ --0.3 (1962) ________ --1.2 (1829)

leg__21 __ 13.7 (1947) _________ 12.0 (1917) _______+0.4 (1993) _________ --1.4 (1880)

v2.0_21 __ 13.7 (1947) _________ 12.0 (1917) _______+0.3 (1993) _________ --1.5 (1880)

leg__22 __ 14.4 (1947) _________ 13.2 (1906) _______--0.3 (1956,65,83) __ --2.3 (1773)

v2.0_22 __ 14.4 (1947) _________ 13.1 (1906) _______--0.5 (1983)^ ________--2.3 (1773)

leg__23 __ 13.3 (1947) _________ 12.3 (1944)^_______--2.9 (1993) _________--4.2 (1858.)

v2.0_23 __ 13.3 (1947) _________ 12.4 (1944)^_______--3.0 (1993) _________--3.9 (1858.)

leg__24 __ 12.7 (1980) _________ 11.5 (1778) ________ 0.0 (1993) _________ --4.6 (1904)

v2.0_24 __ 12.5 (1980) _________ 11.5 (1778) ________-0.1 (1993) _________--3.6 (1816)^

leg__25 __ 12.1 (1964) _________ 11.4 (1888.) _______--1.4 (1952) _________--1.5 (1923)

v2.0_25 __ 12.1 (1964) _________ 11.4 (1888.) _______--1.4 (1952) _________--1.9 (1923)

leg__26 __ 12.1 (1983) _________ 11.2 (1835) ________--0.5 (2010) _________--1.7 (1904)

v2.0_26 __ 11.9 (1983) _________ 11.2 (1835) ________--0.5 (2010) _________--1.7 (1904)

leg__27 __ 11.1 (2006) _________ 11.3 (1818.)_______--1.6 (2010) _________ --2.6 (1915)

v2.0_27 __ 11.0 (2006) _________ 11.3 (1818.)_______--1.6 (2010) _________ --2.7 (1890)

leg__28 __ 11.3 (1953) _________ 12.0 (1828.)_______--4.0 (2010) _______--2.2 (1787,1807,1890)

v2.0_28 __ 11.3 (1953) _________ 12.0 (1828.)_______--4.0 (2010) _________--2.5 (1890)

leg__29 __ 12.1 (2000) _________ 12.2 (1818.)_______--2.5 (2010) _________--2.6 (1801)

v2.0_29 __ 11.9 (2000) _________ 12.2 (1818.)_______--2.5 (2010) _________--2.6 (1801)

leg__30 __ 12.4 (2001) _________ 11.9 (1939) _______--1.7 (1973) _________ --1.6 (1796) 

v2.0_30 __ 12.3 (2001) _________ 12.0 (1939) _______--1.6 (1973) _______ --1.6 (1796&1973)

_________________________________________________

NOTE:

a 14.2 (11 Nov 2022) replaces daily record and recent 13.8 (2015) in v2.0.

Also ...

^ 2nd _ 1981 only 12.9 in v2.0, note also 14.2 in 1811.

* 9th _ as the previous record was in the recent interval, the record high was 11.9 (leg) (1914) until 1977.  In v2.0, 1914 was reduced to 11.1 and was not a record before 1977. The record in v2.0 before 1977 was 11.7 (1849).

**11th _ as the previous record was in the recent interval, the record high was 12.1 (1916), tied in 1982, before 2005.

^^ 18th_ as the previous record was in recent interval, record high was 11.2 (leg, 11.1 v2.0) (1875) before 1978.

 

^ 18th _ 1887 loses record with incr -1.6 to -1.0, 1798 and 1871 (from -1.4) tied at -1.3 new record holders.

^ 19th _ 2003 gains tie with decr 12.6 to 12.5, 1994 decr 12.7 to 12.5 tied.

***19th _as the previous record was in the recent interval, also 12.3 (1948), the record high was 11.2 (1890) before 1948 (in CET legacy) .... in v2.0, 1948 (12.3) was record to 1994/2003 as it was higher than 1978 (decr to 12.2), and 1890 was 11.4. 

****20th _as the previous record was in the recent interval, the record high was 11.5 (leg) (11.2 v2.0) (1890) before 1994.

^ 22nd _ 1956 and 1965 stayed at -0.3 in v2.0. 1983 new sole record of -0.5. 

^ 23rd _ as the previous record was in the recent interval, the record high was 11.8 (1778) before 1944. (note 12.5 1980)

^ 24th _ 1904 loses record with incr of 1.1, -4.6 to -3.5, (1816 remains -3.6), also loses monthly minimum to 28 Nov 2010

^ 27th _ 1890 gains record with decr -2.5 to -2.7, 1915 loses record with incr -2.6 to -2.0

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

 

DECEMBER

Date __ Record Max since 1940 __  previous mark _______ Record Min since 1940 __ previous mark

leg__01 __ 11.0 (1979) _______ 12.1 (1775) _______--3.0 (1947) _______--2.1 (1796)

v2.0_01 __ 10.8 (1979)_(11.9 1939) 12.1 (1775) ____--3.0 (1947) _______--2.1 (1796)

leg__02 __ 12.2 (1985) _______ 11.4 (1779)^_______--1.4 (2010) _______--4.7 (1796) 

v2.0_02 __ 12.0 (1985) _______ 11.4 (1779)^_______--1.4 (2010) _______--4.7 (1796) 

leg__03 __ 12.2 (1985) _______ 11.8 (1953)*_______--2.6 (2010) _______--4.0 (1879)

v2.0_03 __ 12.1 (1985) _______ 11.8 (1953)*_______--2.6 (2010) _______--4.2 (1879)

leg__04 __ 11.7 (1986) _______ 12.1 (1888.) _______--2.0 (1976) _______--3.8 (1879&1925) 

v2.0_04 __ 11.7 (1986) _______ 12.0 (1888.) _______--2.2 (1976) _______--3.6 (1879&1925) 

leg__05 __ 11.5 (2000) _______ 12.6 (1898.)_______--1.8 (1950) _______--3.7 (1844) 

v2.0_05 __ 11.5 (2000) _______ 12.7 (1898.)_______--1.7 (1950) _______--3.7 (1844) 

leg__06 ___ 11.8 (2015) _______ 12.3 (1898) _______--3.8 (2010) _______--5.5 (1844)

v2.0_06 ___ 11.7 (2015) _______ 12.1 (1898) _______--3.8 (2010) _______--5.5 (1844)

leg__07 ___ 10.9 (2015) _______ 12.3 (1856) _______--3.5 (2010) _______--5.7 (1879) 

v2.0_07 ___ 10.9 (2015) _______ 12.1 (1856) _______--3.5 (2010) _______--5.3 (1879)

leg__08 ___ 11.4 (2015) _______ 12.1 (1856) _______--2.7 (2010) _______ -5.4 (1807)

v2.0_08 ___ 11.3 (2015) _______ 12.0 (1856) _______--2.7 (2010) _______ -5.4 (1807)

leg__09 ___ 11.0 (2016) _______ 11.8 (1934) _______--1.9 (1967) _______ -4.0 (1803)

v2.0_09 ___ 11.0 (2016) _______ 11.7 (1934) _______--1.9 (1967) _______ -4.0 (1803)

leg__10 ___ 10.9 (1997) _______ 10.8 (1856) _______--4.0 (1981) _______ -4.5 (1784) 

v2.0_10 ___ 10.7 (1997) _______ 10.7 (1856&1997) _--4.2 (1981) ______ -4.5 (1784) 

leg__11 ___ 12.6 (1994) _______ 11.4 (1898&1978) __--3.3 (1991) ______ -6.7 (1784)

v2.0_11 ___ 12.4 (1994) _______ 11.4 (1898&1978) __--3.4 (1991) ______ -6.7 (1784)

leg__12 ___ 12.9 (1994) _______ 11.7 (1842) _______--8.5 (1981) _______ -3.7 (1791)

v2.0_12 ___ 12.7 (1994) _______ 11.7 (1842) _______--8.7 (1981) _______ -3.7 (1791)

leg__13 ___ 11.3 (1994) _______ 11.6 (1918.) _______--6.5 (1981)_______ -5.1 (1920)

v2.0_13 ___ 11.1 (1994) _______ 11.5 (1918.) _______--6.7 (1981)_______ -4.5 (1878) (-4.4 1920)

leg__14 ___ 11.5 (2006) _______ 11.8 (1912) _______--1.4 (1943) _______ -5.3 (1878.)

v2.0_14 ___ 11.5 (2006) _______ 11.2 (1912) _______--1.4 (1943) _______ -5.5 (1878.)

leg__15 ___ 11.2 (1985) _______ 11.1 (1867) _______--2.6 (1950) _______ -5.4 (1788.)

v2.0_15 ___ 11.1 (1985) _______ 10.9 (1867) _______--2.5 (1950) _______ -5.4 (1788.)

leg__16 ___ 11.4 (2015) _______ 10.8 (1842) _______--2.2 (1981)  ______ -6.6 (1859)

v2.0_16 ___ 11.4 (2015) _______ 10.8 (1842) _______--2.4 (1981)  ______ -6.4 (1859)

leg__17 ___ 12.5 (2015) _______ 11.6 (1904) _______--2.7 (1981) ________ -7.7 (1859)

v2.0_17 ___ 12.5 (2015) _______ 11.4 (1904) _______--2.9 (1981) ________ -7.5 (1859)

leg__18 ___ 12.5 (2015) _______ 11.8 (2014)**______--3.2 (1981) _______ -7.1 (1859) 

v2.0_18 ___ 12.5 (2015) _______ 11.8 (2014)**______--3.4 (1981) _______ -7.0 (1859) 

leg__19 ___ 13.1 (2015) _______ 11.6 (1993)***_____--6.8 (2010) _______ -5.7 (1859)

v2.0_19 ___ 13.0 (2015) _______ 11.4 (1993)***_____--6.8 (2010) _______ -5.6 (1859)

leg__20 ___ 10.8 (2015) _______ 11.1 (1828.)_______ --7.0 (2010) _______--4.2 (1938.) _ (-4.1 1890)

v2.0_20 ___ 10.8 (2015) _______ 11.1 (1828.)_______ --7.0 (2010) _______--4.1 (1938.) _ (-4.0 1890)

leg__21 ___ 11.4 (1971) _______ 11.2 (1828.)_______ --5.9 (2010) _______--4.7 (1855)

v2.0_21 ___ 11.4 (1971) _______ 11.2 (1828.)_______ --5.9 (2010) _______--4.6 (1855)

leg__22 ___ 11.6 (1991) _______ 11.2 (1828.)_______ --2.1 (2010) _______ -6.8 (1890) 

v2.0_22 ___ 11.5 (1991) _______ 11.2 (1828.)_______ --2.1 (2010) _______ -5.7 (1890) 

leg__23 ___ 11.8 (1991) _______ 11.4 (1843) _______ --2.8 (1981) _______ -6.4 (1870) 

v2.0_23 ___ 11.6 (1991) _______ 11.4 (1843) _______ --3.0 (1981) _______ -6.2 (1870) 

leg__24 ___ 10.6 (2002)a_______10.7 (1843)a_______ --3.1 (2010)_______ -6.9 (1870) 

v2.0_24 ___ 11.3 (2023)a_______10.7 (1843)a_______ --2.8 (2010)_______ -6.7 (1830&1870) 

leg__25 ___ 10.4 (1983)b ______10.4 (1824b&1983)__--5.9 (2010) _____-10.8 (1796) 

v2.0_25 ___ 10.7 (2023)b ______ 10.4 (1824&1983)__ --5.9 (2010) _____-10.8 (1796) 

leg__26 ___ 11.0 (2011) _______ 10.9 (1988.)****____ --3.6 (1962) _______-5.4 (1798.) 

v2.0_26 ___ 11.0 (2011) _______ 10.7 (1988.)****___ --3.6 (2010) (-3.51962) _-5.4 (1786&1798.) 

leg__27 ___ 10.9 (2015) _______ 10.6 (1987)*****___ --2.8 (1995) _______ -8.4 (1798.)

v2.0_27 ___ 10.8 (2015) _______ 10.4 (1987)*****___ --3.0 (1995) _______ -8.4 (1798.)

leg__28 ___ 11.5 (1987) _______ 11.0 (1974)******__ --4.7 (1995) _______ -8.2 (1798.)

v2.0_28 ___ 11.3 (1987) _______ 10.8 (1974)******__ --4.8 (1995) _______ -8.2 (1798.)

leg__29 ___ 12.0 (1987) _______ 10.7 (1925) _________ --3.7 (1962) _______ -4.9 (1874) 

v2.0_29 ___ 11.9 (1987) _______ 10.2 (1925) _________ --4.0 (2000)^_______-5.3 (1908) (-4.8 1874) 

leg__30 ___ 11.4 (2021) _______ 11.0 (1834) _________ --2.8 (1962) _______ -6.1 (1870) 

v2.0_30 ___ 11.3 (2021) _______ 11.0 (1834) _________ --3.3 (2000)^______ -6.0 (1870) 

leg__31 ____12.9 (2021) _______ 11.1 (1859) ________ --3.5 (1978) _______ -7.1 (1783)

v2.0_31 ____12.9 (2021) _______ 11.0 (1859) ________ --3.7 (1978) _______ -7.1 (1783)
_______________________________________________

* NOTES: v2.0 14th recent lowest mean -2.5, 15th recent lowest mean -4.4, 16th -2.6, all 2022. 

^ 2nd _ also 11.3 1974 (CET legacy) only 11.0 in v2.0. 

* 3rd _ as previous record also in recent interval, also 11.5 both (1948), record to 1948 was 11.2 (leg, 11.4 v2.0) (1918). 

**18th _ as previous record also in recent interval, record high until 2014 was 11.4 (1932) in both leg and v2.0.

***19th _ as the previous record also in the recent interval, record high until 1993 was 11.2 (1772). 

a _ 2023 (11.3 v2.0) broke both of these, turning 1843 (10.7) into record high before 1940. (2002 was 10.5 in v2.0)

b _2023 (10.7 v2.0) broke both of these (1824, 1983), turning 1824 (10.4) into record high before 1940.  

****26th _ as the previous record also in the recent interval, record high until 1988 was 9.9 (1931) in both leg and v2.0. 

*****27th _ as the previous record also in the recent interval, record high before 1940 was 9.9 (1876, 1882). Since 1940 there were new records in 1949 (10.2), 1974 (10.3). ... In v2.0, 1882 was 10.4 and that exceeded 1949 (10.2) and 1974 (10.0); (1876 was 9.8). 

******28th _ as the previous record also in the recent interval, record high until 1974 was 10.5 (1781). 

^ 29th _ 2000 took these recent lows with substantial changes, 1962 stayed on -3.7 and -2.9 C. 1995 also -3.7 v2.0 29 Dec.

Edited February 12 by Roger J Smith

[Roger J Smith]

Summary of the Recent C.E.T. Daily Records

The previous six posts examine the C.E.T. daily records with the "recent interval" of 1940 to 2019 compared with the longer period of record 1772 to 2018. This is a summary of how the daily records have changed since 1940. (edit Mar 2019 adds one record from Feb 2019 and while two new records in July 2019 replace two from the post-1940 era, one in August switches from pre-1940 to post-1940.)

The record set 18 Nov 2020 replaced another recent one (1978) so no changes to this table.

Month ___ Record Highs broken 1940-2019 __ Record Highs preserved ___ Record Lows broken 1940-2019 __ Record Lows preserved

JAN ______ 12 _______________ 19 ___________[]______6 _______________ 25

FEB ______ 12 _______________ 17 ___________[]______6 + 1 tied _______ 22 + 1 tied

MAR ______ 9 + 2 tied ______ 20 + 2 tied ____ []______4 _______________ 27

APR ______12 + 1 tied ______17 + 1 tied _____[]_____ 5 ________________ 25

MAY ______16 + 1 tied ____14 + 1 tied _____[]_____ 4 ________________27

JUNE _____ 18 + 1 tied ___ 11 + 1 tied _____[]_____ 3 + 2 tied _______ 25 + 2 tied

JULY _____ 16 + 2 tied ____13 + 2 tied _____[]_____ 3 ________________28

AUG ______19 + 2 tied ____10 + 2 tied _____[]_____ 0 ________________31

SEP ______ 16 ______________ 14 ___________[]_____ 3 ________________27

OCT ______18 + 1 tied ____12 + 1 tied _____[]_____ 0 ________________31

NOV ______19 + 2 tied ____ 9 + 2 tied _____ []_____ 3 ________________27

DEC ______ 19 + 1 tied ___ 11 + 1 tied _____[]_____ 6 ________________25

TOTALS __ 188 + 13 tied_ 165 + 13 tied _ [] ___ 43 + 3 tied ___ 320 + 3 tied

____________________________________________________________________

At random, since 82 years is about 30.5% of the entire period, we would expect to see 121 records in this recent interval. We would expect 245 to be preserved from the longer interval 1772-1939). The difference from the expected random numbers are close to equal in terms of more warm records and fewer cold records, although the drop in cold records is slightly more anomalous. Of the 46 days in the recent interval that set or tied a record low, the breakdown by decades is as follows:

1940s _ 7

1950s _ 5

1960s _11

1970s _ 4

1980s _ 9

1990s _ 5

2000s _ 0

2010s _ 5

No cold record was set between May 1996 and November 2010. No cold record broken in the recent interval was broken more than once except for 2nd of June which was broken three times starting in 1964, then again in 1975 and finally in 1991. 

It is far more common for recent maximum records to be the last of several to break a previous-to-1940 record. It has happened about one third of the 180 times a record from before 1940 was beaten. (the 13 ties have not included any yet to be tied more than once since 1940, but of the 175 records for only 1940 to 2018 that are not all-time records, there are a few cases where three years tied. All time, there was one minimum record with three years tying, all of them before 1870.

An odd fact is that the year to fare worst in terms of losing records after 1940 is the first year in the series, 1772, which lost seven records that had survived to 1940 and beyond, and had its lone surviving record tied -- and all of that happened from late October to early December of years mostly since 2013 (one went in 1977, another in 1980). 

The recent interval seems to dominate the records for seven to ten days at a time then fades out for similar intervals. This seems non-random but there is no obvious reason for it. The longest period of consecutive days with original (previous to 1940) records being maintained to the present day (or tied but not broken) is eleven from 19th to 29th of March (one of these was tied in 1945), then nine from the 8th to 15th of July (the first two of these were tied in 1976). The longest interval of warm records being broken after 1940 is 16 days (25 July to 9 August) which includes quite a few of the hottest days ever recorded. Another interval of 11 days occurred from 6 to 16 November. The longest spells of original cold records being broken or tied is stuck at three with three cases (12-14 Jan, 1-3 Feb, and 19-21 December). Four of the first five days of June shared or broke a cold record but the third of June has stayed unbroken. If that one falls then a five day interval would be achieved. 

(note -- table edited for recent record max on 25 June and 11,12 Aug, also 31 Mar 2021 and 8th Sep 2021, then also for 30,31 Dec 2021 1 Jan 2022 and 16 Feb 2022).

As table is based on CET legacy data, no adjustments were made for various records set in may to dec 2022 and all of 2023.

Edited December 25, 2023 by Roger J Smith
recent data added, totals and commentary adjusted

[Roger J Smith]

Although the recent interval has not done too well in breaking minimum CET daily records, sometimes the shortfall is quite pronounced. Two days in January (4th and 20th) failed by six degrees over the eight decades. However, there are a few cases where a recent extreme came within half a degree of breaking a cold record. This is the list of "almost" daily minimum records to add to the 45 which made the all-time record list.

11th Jan ___ -5.0 (1987) within 0.5 of -5.5 (1838.)

29th Jan ___ -6.4 (1947) within 0.4 of -6.8 (1776)

21st Feb ___ -4.3 (1986) within 0.4 of -4.7 (1810)

27th Feb ___ -2.3 (1955) within 0.5 of -2.8 (1929)

28th Feb ___ -3.6 (2018.) within 0.2 of -3.8 (1785)

18th Mar ___ -1.1 (2018.) within 0.2 of -1.3 (1853)

 8th Apr ___ 2.8 (1970) within 0.4 of 2.4 (1780)

 9th Apr ___ 1.7 (1973) within 0.3 of 1.4 (1812)

 1st May ___ 4.3 (1945) within 0.1 of 4.2 (1866)

 9th May ___ 6.0 (1941) within 0.3 of 5.7 (1837)

 7th June __ 8.8 (1985) within 0.2 of 8.6 (1814)

 8th June __ 8.8 (1985) within 0.2 of 8.6 (1881, 1914)

10th June __ 8.7 (1955) within 0.5 of 8.2 (1821)

27th June __ 10.4 (1981) within 0.2 of 10.2 (1862)

 6th July ___ 11.6 (1954) within 0.3 of 11.3 (1877)

 9th July ___ 11.4 (1948) within 0.4 of 11.0 (1856)

17th July ___ 11.3 (1946) within 0.3 of 11.0 (1892)

 1st Aug ___ 12.4 (1966) within 0.5 of 11.9 (1888)

 7th Aug ___ 11.8 (1962) within 0.2 of 11.6 (1898)

20th Aug ___ 10.9 (1964) within 0.4 of 10.5 (1920)

 6th Sept ___ 8.6 (1952) within 0.1 of 8.5 (1841) -- then 7th was a record for 1952

 8th Sept ___ 9.4 (1952) within 0.5 of 8.9 (1807, 1831)

 9th Sept ___ 9.5 (1965, 1986) within 0.3 of 9.2 (1860, 1912)

18th Sept ___ 7.0 (1952) within 0.1 of 6.9 (1807)

 4th Oct ____ 5.7 (1994) within 0.6 of 5.1 (1912) -- the closest recent minimum to an all-time record in October

 3rd Nov ____ 2.1 (1980) within 0.2 of 1.9 (1820)

25th Nov ____ -1.4 (1952) within 0.1 of -1.5 (1923)

29th Nov ____ -2.5 (2010) within 0.1 of -2.6 (1801) -- a day after 2010 set first minimum since May 1996.

10th Dec ____ -4.0 (1981) within 0.5 of -4.5 (1784)

The last of these came two days before 1981 set two records, the one on the 12th is by a slight margin the largest improvement over a pre-1940 record, -8.5 replacing -3.7 from 1791. The second biggest improvement was on 24th Feb when 1947 (-6.7) replaced -2.1 (1814). 

In the above list, 28 come within 0.5 deg of breaking a pre-1940 record (a 29th entry was the best October could do). Adding these to the 46 actual record lows (including three ties) we come to 74 records and near-records. This makes the recent interval look a bit more competitive. There's a reason I don't use the term modern /// era -- try typing that to a post and see what the filter does with it. (leaving out the ///)

 

Edited January 29, 2019 by Roger J Smith

[Roger J Smith]

Continuing on with the updates from the old thread ...

although colour font has been removed from Net-weather it still shows up on some screens. If you don't see red and blue colour codes in this post then it's worth having a look on some other device where they show up. 

 

Record CET values in chronological order

__________________________________________

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

... based on CET legacy records, with any new records since 1 May 2022 noted.

 

1772 ___ 19 Apr, -0.2 ___ 29 Oct* 14.0* (this record already lost to v2.0, 2005, which then lost 14.1 to 14.9 set in v2.0 in 2022.

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 March 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 ___ 22 Apr, 3.4

1779 ___ 20 Mar, 12.3 (tied 2024)

1780 ___ 08 Apr, 2.4 __ 29 May, 21.2 __ 01 Sep* 21.8*

1781 ___ 01 Jun, 21.9 (note assigned tie w1898 at 19.1 in v2.0 for 9 Sep, lost to 2023 22.8)

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 -3.8 __ 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 (broken 13.0 in 2020) __ 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 (broken 12.1 in 2024)

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 ___ 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 (broken 2021) __ 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* replaced 2023 20.9 __ 24 Jul, 23.9 ___ 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* broken by 10.7 1983

1825 ___ 15 Jul, 23.7 __ 18 Jul, 23.3 (replaced in v2.0 24.4 in 2022)

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 (broken 2021 11.4)

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 

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 (broken 2023 at 11.3)

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 ___ 24 Feb, 11.4 (broken in v2.0 by 2021) __ 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 (broken 2022)

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 (broken 2021)

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 broken by 21.6 (v2.0) 2023

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 __ 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 (broken 2023) __ 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 ___ 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 (tied by 2023 in v2.0 at 11.3) __ 01 Mar, 10.7 __ 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 (went to 1921 in v2.0)

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 (tied at 15.4 in v2.0 by 2022) __ 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 (6 Sep 20.9 v2.0 broken by 21.1 in 2023) ( 8 Sep broken by 21.4 in 2021, restored in v2.0) (9 Sep 19.8 broken by 2023 at 22.8 after being assigned tie w1781 at 19.5 in v2.0). __ 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 (broken 21.7 in 2019)

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 

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 __ 13-14 Aug, 23.6, 21.3 (14th replaced v2.0 23.6 2022)

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 ___ 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 broken 2023 __ 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 (after adj to 14.9, replaced by 15.0 in v2.0 by 2022)

1928 ___ 16 Feb, 10.0 (broken 10.3 in 2022) __ 10 Apr, 13.5 (broken 14.1 in 2020) __ 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 __ 23-24 Jun, 21.8,22.0,21.6 25th (broken 2020)

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* (broken 2020)

1944 ___ 28 Jan, 9.8 __ 30 May, 21.0

1945 ___ 26 Jan, -7.6 __ 18 Feb, 11.7 (broken 2024) __ 23 Mar* 12.1* __ 15-16 Apr, 16.3,17.0 __  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 br 2020 __ 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 broken 13.7 2024 (1958 was 11.1 in v2.0)

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 __ 28-30 Jun, 22.6,22.4,22.1 __ 2-4 Jul, 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 broken 2020

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* broken by 2023 (10.7) _ fell out of tie w1824 (10.4) in v2.0 (10.2)

1984 ___ 27 May, 6.6 __21 Aug, 21.6 __ 29 Oct* 14.0* (see note with tied value 1772)

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 __ 28-29 Dec, 11.5,12.0

1988 ___ 09 Nov, 12.5

1989 ___ 06 Mar, 12.0 __ 13 Jun* 20.5* replaced 2023 20.9 __ (23 Jul, 22.4 -- broken in 2019)

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

1994 ___ 19 Nov, 12.7 __ 11-12 Dec, 12.6, 12.9

1995 ___ 01 Apr, 13.3 __ 31 Jul* (br 2020),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 Aug, 22.5* __ 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 (replaced v2.0 2022 14.8)

1999 ___ 11 Sep, 20.3

2000 ___ 30 Jan, 10.2 __ 08 Mar, 12.2

2001 ___ 30 Nov, 12.4

2003 ___ 16 Jul, 22.7 __ 05-06 Aug 23.1,22.5 __ 09 Aug 23.9

2004 ___ 03,04,05 Feb, 12.2,1,11.8 __ 16 Mar, 13.2

2005 ___ 17 Mar, 13.2 __ 01 May* 16.1* __ 18-19 Jun, 21.2, 22.1 __ 30 Oct, 15.5 

2006 ___ 12 Jun, 20.8 (replaced by v2.0 2023 21.7) __ 19 Jul, 24.5 (replaced v2.0 2022 28.1) __ 25-26 Jul, (22.7 broken in 2019), 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 __  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

2015 ___ 01 July, 24.6 __ 06-07 Nov, 14.3,13.8 __ 11 Nov, 13.9 (replaced 2022 by 14.2 in v2.0)  __ 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 __ 22.5, 23 July __ 25.2, 25 July (tied with 29 July 1948) (as top July value, broken 19 July 2022) __ 25 Aug 21.7

2020 ___ 08 Apr 13.0, 10 Apr 14.1 __ 25 June 22.6 __ 31 July 23.7 __ 11-12 Aug 24.0, 25.1 _ 15 Sep 20.1 _ 18 Nov 12.8

2021 ___  24 Feb (v2.0 only) 11.5, 31 Mar 14.3 __ 8 Sep 21.4 _ 30 Dec 11.4, 31 Dec 12.9

2022 ___ 1 Jan 12.6 _ 16 Feb 10.3 (v2.0 only, 24.4 18 July, 28.1 19 July, 23.6 14 Aug, 14.8 23 Oct, 15.0 26 Oct, 15.4* 28 Oct (now tied with 1888 in v2.0), 29 Oct 14.9, 11 Nov 14.2

2023 ___ 17 Feb 11.3 (v2.0 tied 1878 which was revised up from 10.7 in legacy) _ 12 June 21.7 (record in both legacy and v2.0 was 20.8 from 2006). 13 June 20.9 (v2.0 1818 20.5, legacy 1818/1989) 6 Sep 21.1 (broke 1898), 23.3 7 Sep _ broke daily record 20.9 (v2.0, was 21.1 in CET legacy) from 1868, and monthly 22.4 (v2.0) 5 Sep 1949, was 22.6 in CET legacy on 2 Sep 1906 _ 22.0 8 Sep broke 21.6 from 1898, 22.8 9 Sep broke 19.5 from 1781, 1898 _ 21.6 10 Sep broke 19.1 from 1865, 2011. __ 17.5 7 Oct broke 16.9 from 1921 _ 11.3 24 Dec broke 10.7 from 1843. _ 10.7 25 Dec broke 10.4 (1824, 1983 tie 10.4 legacy CET, 1824 alone 10.4 v2.0)

2024 ___ 15 Feb 13.7 (broke 1958 11.1 v2.0) __ 18 Feb 12.0 (broke 1945 11.8 v2.0) _ 12.1 14 Mar (broke 1805) __ 12.3 tied 1779 Mar 20.

... note that table above is based on CET legacy data to 1 May 2022 and all records indicated are subject to possible change in the v2.0 data set as outlined in the daily record section earlier. One recent example of a change would be 8 Sep 2021 (21.4) which lost its record to adjusted 8 Sep 1898 (went to 21.6). 

Legacy records replaced by v2.0 since 1 May 2022 are noted in the table. 

(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)

^ monthly record values tied with other cases (Jan max, Apr and June min). 

Edited March 21 by Roger J Smith
Feb 15, 18 2024 in table (broke 1958, 1945) and 03-14 2024 (broke 1805) 03-20-2024 tied 1779

[Roger J Smith]

Continuing with the transfer of data from older thread ... 

Highest and lowest CET daily means for each year 1772 to 2018 (part 1 to 1900)

YEAR .. MAX DAILY MEAN (date)..... MIN DAILY MEAN (date) ... Coldest of winter (Jan-Feb of year)

1772 ... 20.8 ... 26 June .................. -4.5 ... 06 Feb ...............-4.5 on 6 Feb .. no data Nov-Dec 1771

1773 ... 22.5 ... 10 Aug ................... -3.3 ... 09 Feb ...............-4.0 on 25 Dec 1772

1774 ... 20.2 ... 09 Aug ................... -3.2 ... 09 Dec .............. -3.0 on 4-5 Jan 1774

1775 ... 21.1 ... 21 July ................... -3.7 ... 25 Jan ............... -3.7 on 25 Jan 1775

1776 ... 20.3 ... 02 Aug ................... -7.5 ... 30 Jan ............... -7.5 on 30 Jan 1776

1777 ... 19.4 ... 16 & 17 July............ -5.0 ... 08 Jan,19 Feb ... -5.0 on 8 Jan & 19 Feb 1777

1778 ... 21.6 ... 13 July .................. -2.9 ... 27 Jan .............. -2.9 on 27 Jan 1778

1779 ... 22.0 ... 15 July ................... -5.1 ... 25 Dec ............... -1.4 on 15 Jan 1779

1780 ... 21.8 ... 01 Sep ................... -6.1 ... 13 Jan ............... -6.1 on 13 Jan 1780

1781 ... 20.9 ... 01 June .................. -2.9 ... 23 Jan ............... -2.9 on 23 Jan 1781

1782 ... 20.1 ... 26 June .................. -2.2 ... 16 Feb .............. -2.2 on 16 Feb 1782

1783 ... 22.6 ... 11 July .................... -7.1 ... 31 Dec .............. -4.7 on 26 Feb 1783

1784 ... 20.3 ... 07 July .................... -6.7 ... 12 Feb, 11 Dec.. -7.1 on 31 Dec 1783

1785 ... 19.5 ... 27 June, 26 July ..... -6.6 ... 20 Feb ............... -6.7 on 11 Dec 1784

1786 ... 20.7 ... 05 June ...................-7.6 ... 03 Jan ................ -7.6 on 3 Jan 1786

1787 ... 19.9 ... 05 July .................... -2.2 ... 28 Nov ............... -0.5 on 15 Nov 1786 & 27 Jan 1787**

1788 ... 20.4 ... 12 July .................... -5.9 ... 30 Dec .............. -2.5 on 8 March 1788

1789 ... 19.2 ... 05 Aug .................... -6.7 ... 12 Jan ............... -6.7 on 12 Jan 1789

1790 ... 21.8 ... 22 June .................. -0.6 ... 29 Dec ............... +0.6 on 20 Jan 1790

1791 ... 20.0 ... 05 June .................. -3.7 ... 12 Dec ................ -0.6 on 29 Dec 1790

1792 ... 21.8 ... 12 Aug ................... -5.4 ... 12 Jan ................. -5.4 on 12 Jan 1792

1793 ... 22.2 ... 16 July .................... -0.7 ... 30 Dec ............... -1.5 on 31 Dec 1792

1794 ... 20.6 ... 07 July .................... -2.8 ... 10 Jan ................ -2.8 on 10 Jan 1794

1795 ... 20.7 ... 12 Aug .................... -8.9 ... 25 Jan ................ -8.9 on 25 Jan 1795

1796 ... 19.6 ... 22 Aug .................. -10.8 ... 25 Dec .............. -1.4 on 6 & 7 March 1796

1797 ... 21.2 ... 14 July .................... -2.6 ... 09 Jan .............. -10.8 on 25 Dec 1796

1798 ... 21.4 ... 29 June .................. -8.4 ... 27 Dec ............... -1.6 on 19 Feb 1798

1799 ... 18.7 ... 10 June .................. -6.0 ... 31 Dec ................-8.4 on 27 Dec 1798

1800 ... 21.7 ... 02 Aug ................... -5.0 ... 01 Jan ................ -6.0 on 31 Dec 1799

1801 ... 20.2 ... 22 July ................... -3.8 ... 19 Dec ................ -1.3 on 13 Feb 1801

1802 ... 19.8 ... 06 Aug ................... -4.1 ... 13 Jan ................. -4.1 on 13 Jan 1802

1803 ... 20.8 ... 02 & 31 July ........... -5.9 ... 26 Jan ................. -5.9 on 26 Jan 1803

1804 ... 21.0 ... 01 Aug ................... -4.1 ... 24 Dec ................ -4.0 on 9 Dec 1803

1805 ... 18.9 ... 04 July ................... -3.8 ... 13 Dec ................ -4.1 on 24 Dec 1804

1806 ... 19.5 ... 10 June .................. -1.2 ... 30 Jan ................ -3.8 on 13 Dec 1805

1807 ... 21.2 ... 22 July .................... -5.4 ... 08 Dec ............... -2.5 on 18 & 19 Feb 1807

1808 ... 24.5 ... 13 July .................... -5.7 ... 22 Jan ................ -5.7 on 22 Jan 1808

1809 ... 18.5 ... 11 Aug*................... -5.1 ... 18 Jan ................ -5.1 on 18 Jan 1809

1810 ... 20.5 ... 02 Sep ................... -4.7 ... 21 Feb ................ -4.7 on 21 Feb 1810

1811 ... 18.6 ... 29 July ................... -3.6 ... 03 Jan ................. -3.6 on 3 Jan 1811

1812 ... 19.0 ... 18 July ................... -4.4 ... 08 Dec ................ -2.7 on 31 Dec 1811

1813 ... 20.2 ... 30 July ................... -3.2 ... 30 Dec ................ -4.4 on 8 Dec 1812

1814 ... 22.0 ....28 July ................... -6.7 ... 10 Jan ................. -6.7 on 10 Jan 1814

1815 ... 18.4 ... 12 July & 25 Aug..... -5.3 ... 24 Jan ................. -5.3 on 24 Jan 1815

1816 ....18.5 ... 20 July ................... -8.8 ... 09 Feb ................. -8.8 on 9 Feb 1816

1817 ... 22.7 ... 21 June ................. -2.0 ... 10 Jan .................. -4.9 on 22 Dec 1816

1818 ... 23.9 ... 24 July ................... -3.0 ... 17 Dec ................. -2.0 on 1 Jan 1818

1819 ... 21.8 ... 31 July ................... -6.0 ... 11 Dec ................. -3.0 on 17 Dec 1818

1820 ....21.9 ... 28 June .................. -8.5 ... 15 Jan ................. -8.5 on 15 Jan 1820

1821 ... 19.8 ... 05 Aug ................... -3.3 ... 02 Jan ................. -3.3 on 2 Jan 1821

1822 ....21.1 ... 10 Jun .................... -3.8 ... 28 Dec ................ +0.7 on 16 Jan 1822

1823 ... 19.2 ... 20 July & 14 Sep .... -8.9 ... 19 Jan ................. -8.9 on 19 Jan 1823

1824 ... 21.1 ... 02 Sep .................. -0.9 ... 14 Jan ................. -0.9 on 14 Jan 1824

1825 ... 23.7 ... 15 July .................. -1.2 ... 27 Dec ................. -0.7 on 4 Feb 1825

1826 ... 22.8 ... 27 June .................. -6.9 ... 15 Jan ................. -6.9 on 15 Jan 1826

1827 ... 20.7 ... 29 July ................... -4.7 ... 03 Jan ................. -4.7 on 03 Jan 1827

1828 ... 20.9 ... 03 July ................... -1.0 ... 09 Jan .................-1.0 on 22 Nov 1827 & 9 Jan 1828

1829 ... 19.0 ... 03 June .................. -4.8.... 23 Jan ................ -4.8 on 23 Jan 1829

1830 ... 22.5 ... 30 July .................... -6.7 ... 24 Dec ................ -6.4 on 6 Feb 1830

1831 ... 20.2 ... 09 July .................... -3.0 ... 30 Jan ................. -6.7 on 24 Dec 1830

1832 ... 19.9 ... 10 Aug .................... -1.9 ... 01 Jan ................ -1.9 on 01 Jan 1832

1833 ... 20.0 ... 15 May & 28 July ..... -2.6 ... 23 Jan ............... -2.6 on 23 Jan 1833

1834 ... 22.3 ... 17 July .................... +0.4 ... 08 Feb ............... +0.4 on 8 Feb 1834

1835 ... 20.7 ... 10 & 11 Aug ............ -5.2 ... 07 Jan ................ -5.2 on 7 Jan 1835

1836 ... 22.1 ... 05 July .................... -3.5 ... 02 Jan ................ -3.5 on 2 Jan 1836

1837 ... 21.2 ... 27 July .................... -3.3 ... 01 Jan ................ -3.3 on 1 Jan 1837

1838 ... 20.3 ... 13 July .................. -11.9 ... 20 Jan ............. -11.9 on 20 Jan 1838

1839 ... 18.9 ... 03 Aug .................... -3.0 ... 30 Jan .................-3.0 on 30 Jan 1839

1840 ... 19.6 ... 06 Aug ................... -4.4 ... 25 Dec ................ -4.1 on 07 Jan 1840

1841 ... 18.8 ... 27 Aug .................... -9.2 ... 08 Jan ................ -9.2 on 8 Jan 1841

1842 ... 21.9 ... 10 Aug .................... -1.8 ... 09 Jan ................ -2.7 on 18 Dec 1841

1843 ... 20.4 ... 05 July .................... -3.5 ... 15 Feb ............... -3.5 on 15 Feb 1843

1844 ... 21.6 ... 23 June ................... -5.5 ... 06 Dec ............... -3.1 on 13 Feb 1844

1845 ... 19.6 ... 15 June ................... -7.7 ... 12 Feb ............... -7.7 on 12 Feb 1845

1846 ... 22.0 ... 22 June ................... -4.2 ... 14 & 15 Dec ....... -0.3 on 13 Dec 1845, 5 Jan 1846

1847 ... 22.5 ... 14 July .................... -5.0 ... 09 Feb ................ -5.0 on 9 Feb 1847

1848 ... 20.5 ... 06 July .................... -4.4 ... 28 Jan ................. -4.4 on 28 Jan 1848

1849 ... 19.0 ... 07 Aug .................... -3.8 ... 02 Jan & 28 Dec...-3.8 on 2 Jan 1849

1850 ... 21.3 ... 15 July .................... -2.8 ... 07 Jan ................. -3.8 on 28 Dec 1849

1851 ... 20.3 ... 27 June .................. -0.4 ... 30 Nov ................ -0.2 on 24 Jan 1851

1852 ... 24.0 ... 05 July .................... -0.5 ... 20 Feb ............... -0.5 on 20 Feb 1852

1853 ... 18.8 ... 07 July .................... -5.0 ... 28 Dec ............... -3.2 on 13 Feb 1853

1854 ... 21.2 ... 24 July .................... -4.6 ... 02 Jan ................ -5.0 on 28 Dec 1853

1855 ... 20.3 ... 23 July .................... -7.3 ... 16 Feb ............... -7.3 on 16 Feb 1855

1856 ... 22.2 ... 02 Aug .................... -3.0 ... 28 Dec ............... -4.7 on 21 Dec 1855

1857 ... 21.1 ... 28 June & 23 Aug ....-3.0 ... 29 Jan ................ -3.0 on 28 Dec 1856 & 29 Jan 1857

1858 ... 22.9 ... 15 June .................. -4.2 ... 23 Nov ................ -2.0 on 10 Mar 1858

1859 ... 22.2 ... 18 July .................... -7.7 ... 17 Dec ................-4.2 on 23 Nov 1858

1860 ... 17.2 ... 05 July .................... -3.9 ... 13 Feb ............... -7.7 on 17 Dec 1859

1861 ... 19.6 ... 12 Aug .................... -3.4 ... 29 Dec ............... -3.7 on 20 & 27 Dec 1860

1862 ... 17.3 ... 01 Aug .................... -2.6 ... 18 Jan ................ -3.4 on 29 Dec 1861

1863 ... 19.5 ... 07 Aug .................... +0.9 ... 11 Jan .............. -1.1 on 13 Nov 1862

1864 ... 19.7 ... 30 Aug .................... -6.2 ... 06 Jan ................ -6.2 on 6 Jan 1864

1865 ... 19.9 ... 04 & 24 July ............ -6.1 ... 28 Jan ................ -6.1 on 28 Jan 1865

1866 ... 20.6 ... 12 July .................... -3.2 ... 28 Feb ............... -3.2 on 28 Feb 1866

1867 ... 20.4 ... 13 Aug .................... -9.3 ... 04 Jan ................ -9.3 on 4 Jan 1867

1868 ... 23.2 ... 22 July .................... -1.4 ... 01 & 02 Jan ........ -1.4 on 1 & 2 Jan 1868

1869 ... 21.9 ... 17 July .................... -2.7 ... 28 Dec .................-0.7 on 24 Jan 1869

1870 ... 21.4 ... 08 July .................... -6.9 ... 24 Dec ................ -3.2 on 26 Jan & 11 Feb 1870

1871 ... 21.6 ... 13 Aug .................... -3.6 ... 01 Jan ................ -6.9 on 24 Dec 1870

1872 ... 22.0 ... 25 July ................... +0.7 ... 21 Mar & 11 Dec . -2.3 on 8 Dec 1871

1873 ... 22.3 ... 22 July .................... -2.9 ... 10 & 11 Dec ....... -1.5 on 1 Feb 1873

1874 ... 21.4 ... 09 July .................... -5.5 ... 22 Dec ................ -2.9 on 10 & 11 Dec 1873

1875 ... 19.2 ... 08 Aug .................... -1.7 ... 05 Dec ................ -5.5 on 22 Dec 1874

1876 ... 22.4 ... 17 Aug .................... -3.3 ... 11 Feb ............... -3.3 on 11 Feb 1876

1877 ... 19.6 ... 20 Aug .................... -1.0 ... 28 Feb ................ -1.0 on 28 Feb 1877

1878 ... 22.9 ... 20 July .................... -5.8 ... 25 Dec ................ +0.4 on 27 Dec 1877

1879 ... 18.4 ... 12 Aug .................... -5.7 ... 07 Dec .................-5.8 on 25 Dec 1878

1880 ... 20.7 ... 04 Sep .................... -4.3 ... 20 Jan ................. -5.7 on 07 Dec 1879

1881 ... 21.9 ... 05 July .................... -8.1 ... 21 Jan ................ -8.1 on 21 Jan 1881

1882 ... 18.6 ... 13 Aug .................... -3.7 ... 11 Dec ............... -1.0 on 10 Dec 1881

1883 ... 19.0 ... 30 June .................. -2.4 ... 10 Mar ............... -3.7 on 11 Dec 1882

1884 ... 22.5 ... 11 Aug .................... -1.1 ... 23 Dec ................ -0.1 on 7 Dec 1883

1885 ... 21.1 ... 26 July .................... -2.1 ... 08 Dec ................ -1.1 on 23 Dec 1884

1886 ... 20.7 ... 04 July .................... -3.3 ... 20 Dec ............... -2.7 on 7 Jan 1886

1887 ... 20.6 ... 06 Aug .................... -3.9 ... 01 Jan ................ -3.9 on 01 Jan 1887

1888 ... 19.6 ... 10 Aug .................... -1.8 ... 25 Feb ............... -2.3 on 27 Dec 1887

1889 ... 19.2 ... 12 Sep .................... -2.7 ... 10 Feb ................-2.7 on 10 Feb 1889

1890 ... 18.2 ... 05 Aug .................... -6.8 ... 22 Dec ................ -2.0 on 3 Mar 1890

1891 ... 18.8 ... 25 June ................... -6.1 ... 18 Jan ................ -6.8 on 22 Dec 1890

1892 ... 19.4 ... 03 July .................... -5.0 ... 28 Dec ............... -4.9 on 24 Dec 1891

1893 ... 22.6 ... 18 Aug .................... -5.0 ... 05 Jan ................ -5.0 on 28 Dec 1892 & 5 Jan 1893

1894 ... 20.1 ... 01 July .................... -6.9 ... 06 Jan ................ -6.9 on 6 Jan 1894

1895 ... 20.0 ... 26 June ................... -8.3 ... 08 Feb ............... -8.3 on 8 Feb 1895

1896 ... 20.7 ... 16 June ................... -0.9 ... 21 Jan & 30 Nov.. -0.9 on 21 Jan 1896

1897 ... 22.2 ... 05 Aug .................... -2.8 ... 23 Dec ................ -2.2 on 23 Jan 1897

1898 ... 21.3 ... 08 Sep ................... +0.2 ... 21 Feb ................ -2.8 on 23 Dec 1897

1899 ... 21.1 ... 20 July .................... -4.8 ... 14 Dec ............... -1.6 on 21 Mar 1899

1900 ... 22.0 ... 20 July .................... -3.4 ... 08 Feb ............... -4.8 on 14 Dec 1899

_______________________________________________________

* worth noting that 18.4 on 19 May 1809 was just 0.1 below the annual max.

** the winter of 1786-87 has incomplete daily data; December dates are all listed as 2.8 which is the monthly mean but it's unlikely that this was the case, probably some day reached a value below the -0.5 C recorded in Nov 1786 and Jan 1787, a good estimate from the mean would be -3.5 C.

[Roger J Smith]

(part 2 of above 1901 to 2021)

YEAR ... MAX DAILY MEAN (date) .... MIN DAILY MEAN (date) .... WINTER MIN (date)

1901 ... 22.6 ... 19 July .................... -3.5 ... 22 Dec ............... -2.6 on 14 Feb 1901

1902 ... 20.0 ... 28 June .................. -3.6 ... 13 Feb ............... -3.6 on 13 Feb 1902

1903 ... 20.2 ... 09 July .................... -3.3 ... 14 Jan ............... -3.3 on 14 Jan 1903

1904 ... 21.4 ... 04 Aug .................... -4.6 ... 24 Nov ............... -2.6 on 29 Dec 1903

1905 ... 19.5 ... 09,13,14 July .......... -1.8 ... 16 Jan ................ -4.6 on 24 Nov 1904

1906 ... 22.6 ... 02 Sep .................... -2.5 ... 26 Dec ............... -0.7 on 18 Nov 1905

1907 ... 18.0 ... 16 July .................... -3.4 ... 24 Jan ................ -3.4 on 24 Jan 1907

1908 ... 19.6 ... 30 Sep .................... -5.2 ... 30 Dec ............... -2.4 on 05 Jan 1908

1909 ... 20.3 ... 15 Aug .................... -2.9 ... 04 Mar ................-5.2 on 30 Dec 1908

1910 ... 18.7 ... 20 & 21 June .......... -3.6 ... 27 Jan ................ -3.6 on 27 Jan 1910

1911 ... 23.6 ... 13 Aug .................... -2.4 ... 02 Feb ............... -2.4 on 2 Feb 1911

1912 ... 22.0 ... 15 & 16 July ............ -5.0 ... 04 Feb ............... -5.0 on 4 Feb 1912

1913 ... 18.9 ... 27 Sep .................... -1.9 ... 31 Dec ............... -0.9 on 30 Nov 1912 & 13 Jan 1913

1914 ... 21.0 ... 30 June ................... -0.4 ... 23 Jan ............... -1.9 on 31 Dec 1913

1915 ... 19.5 ... 08 June ................... -2.6 ... 27 Nov ............... -0.1 on 23 Dec 1914

1916 ... 20.0 ... 12 Aug .................... -2.3 ... 16 Dec ............... -2.6 on 27 Nov 1915

1917 ... 21.4 ... 17 June ................... -7.2 ... 07 Feb ............... -7.2 on 7 Feb 1917

1918 ... 21.0 ... 22 Aug .................... -3.3 ... 08 Jan ................ -3.3 on 8 Jan 1918

1919 ... 19.9 ... 16 Aug .................... -3.6 ... 09 Feb ................-3.6 on 9 Feb 1919

1920 ... 18.5 ... 25 May..................... -5.1 ... 13 Dec ............... -1.4 on 12 Nov 1919

1921 ... 22.3 ... 18 July .................... -0.5 ... 09 Nov ................ -5.1 on 13 Dec 1920

1922 ... 19.5 ... 23 May .................... -2.8 ... 06 Feb ............... -2.8 on 6 Feb 1922

1923 ... 24.0 ... 13 July ...,,............... -2.2 ... 27 Nov ......,......... +1.2 on 20 Feb 1923

1924 ... 21.2 ... 12 July .................... -1.7 ... 09 Jan ................ -2.2 on 27 Nov 1923

1925 ... 22.3 ... 22 July .................... -3.8 ... 04 Dec ................ +0.9 on 13 Mar 1925

1926 ... 22.1 ... 14 July .................... -4.8 ... 16 Jan ................. -4.8 on 16 Jan 1926

1927 ... 19.3 ... 06 Aug .................... -4.4 ... 19 Dec ................ -1.9 on 11 & 12 Feb 1927

1928 ... 19.2 ... 24 July .................... -1.5 ... 15 Dec ................ -4.4 on 19 Dec 1927

1929 ... 20.8 ... 16 July .................... -8.0 ... 15 Feb .................-8.0 on 15 Feb 1929

1930 ... 22.8 ... 27 Aug .................... -1.7 ... 17 Nov ................ -1.0 on 20 Mar 1930

1931 ... 18.7 ... 04 Aug .................... -2.1 ... 07 Mar ................ -2.1 on 7 Mar 1931

1932 ... 22.8 ... 19 Aug .................... -2.0 ... 10 Feb ............... -2.0 on 10 Feb 1932

1933 ... 22.2 ... 04 Aug ................... -3.0 ... 24 Jan ................ -3.0 on 24 Jan 1933

1934 ... 20.9 ... 07 July .................... -0.2 ... 02 Feb ................ -0.4 on 6 & 10 Dec 1933

1935 ... 22.0 ... 24 June ................... -4.0 ... 23 Dec ................ -0.2 on 9 & 28 Jan 1935

1936 ... 21.6 ... 21 June ................... -1.6 ... 13 Feb ............... -4.0 on 23 Dec 1935

1937 ... 21.4 ... 03 July .................... -1.1 ... 29 Jan & 18 Dec . -1.1 on 29 Jan 1937

1938 ... 20.8 ... 01 Aug .................... -4.2 ... 20 Dec ................ -1.1 on 18 Dec 1937

1939 ... 20.6 ... 07 June ................... -2.3 ... 30 Dec .................-4.2 on 20 Dec 1938

1940 ... 20.4 ... 08 & 09 June .......... -7.1 ... 21 Jan ................. -7.1 on 21 Jan 1940

1941 ... 22.5 ... 12 July .................... -3.6 ... 16 Jan ................ -3.6 on 16 Jan 1941

1942 ... 23.0 ... 28 Aug .................... -5.0 ... 21 Jan ................ -5.0 on 21 Jan 1942

1943 ... 23.4 ... 31 July .................... -1.4 ... 14 Dec ................ -0.9 on 4 Jan 1943

1944 ... 21.1 ... 29 May .................... -1.9 ... 26 Dec ............... -1.4 on 14 Dec 1943

1945 ... 21.0 ... 15 July .................... -7.6 ... 26 Jan ................ -7.6 on 26 Jan 1945

1946 ... 19.8 ... 02 July .................... -3.7 ... 20 Jan ................ -3.7 on 20 Jan 1946

1947 ... 23.0 ... 03 June ................... -6.7 ... 24 Feb ............... -6.7 on 24 Feb 1947

1948 ... 25.2 ... 29 July .................... -2.7 ... 21 Feb ............... -3.0 on 1 Dec 1947

1949 ... 22.4 ... 05 Sep .................... -0.6 ... 04 Feb ................-1.8 on 26 Dec 1948

1950 ... 22.5 ... 06 June ................... -2.8 ... 26 Jan ................ -2.8 on 26 Jan 1950

1951 ... 19.5 ... 21 July .................... -1.6 ... 29 Jan ................ -2.6 on 15 Dec 1950

1952 ... 22.5 ... 01 July .................... -3.7 ... 27 Jan ................ -3.7 on 27 Jan 1952

1953 ... 22.0 ... 12 Aug .................... -0.9 ... 05 Jan ................ -1.4 on 25 Nov 1952

1954 ... 18.2 ... 01 Sep .................... -5.0 ... 02 Feb ................ -5.0 on 2 Feb 1954

1955 ... 22.1 ... 22 & 23 Aug ............ -3.3 ... 20 Feb ............... -3.3 on 20 Feb 1955

1956 ... 18.7 ... 08 July & 22 Sep ..... -6.8 ... 01 Feb ............... -6.8 on 1 Feb 1956

1957 ... 22.3 ... 06 July ..................... -0.9 ... 16 Dec ............... -0.5 on 23 Nov 1956

1958 ... 20.0 ... 10 Aug .................... -2.8 ... 22 Jan ................ -2.8 on 22 Jan 1958

1959 ... 21.4 ... 20 Aug .................... -3.2 ... 14 & 16 Jan .........-3.2 on 14 & 16 Jan 1959

1960 ... 20.4 ... 05 June ................... -2.0 ... 14 Jan ................ -2.0 on 14 Jan 1960

1961 ... 21.6 ... 29 Aug .................... -3.5 ... 28 Dec ................ -0.7 on 13 Dec 1960
1962 ... 18.0 ... 09 July .................... -4.9 ... 01 Jan ................ -4.9 on 01 Jan 1962
1963 ... 19.1 ... 30 July .................... -8.4 ... 23 Jan ................ -8.4 on 23 Jan 1963
1964 ... 19.4 ... 17 July .................... -2.3 ... 26 Dec ................ -2.3 on 23 Dec 1963
1965 ... 18.6 ... 12 Aug .................... -3.9 ... 03 Mar ................ -3.9 on 3 Mar 1965
1966 ... 19.5 ... 09 June ................... -4.9 ... 19 Jan ................ -4.9 on 19 Jan 1966
1967 ... 20.6 ... 17 July .................... -2.2 ... 08 Dec ................ -1.8 on 08 Jan 1967
1968 ... 21.8 ... 01 July .................... -2.5 ... 10 Jan ................ -2.5 on 10 Jan 1968
1969 ... 21.4 ... 16 July .................... -3.5 ... 08 Feb ................-3.5 on 8 Feb 1969
1970 ... 21.6 ... 07 July .................... -3.7 ... 07 Jan ................ -3.7 on 7 Jan 1970
1971 ... 19.9 ... 09 July .................... -3.4 ... 04 Jan ................ -3.4 on 4 Jan 1971
1972 ... 19.2 ... 18 July .................... -4.5 ... 31 Jan ................ -4.5 on 31 Jan 1972
1973 ... 20.9 ... 16 Aug .................... -1.7 ... 30 Nov ............... -1.5 on 15 Feb 1973
1974 ... 18.6 ... 15 Aug .................... -1.6 ... 01 Jan ................ -1.7 on 30 Nov 1973
1975 ... 23.7 ... 08 Aug ...................... 0.0 ... 14 Dec ............... +1.7 on 09 Feb 1975
1976 ... 24.7 ... 04 July .................... -2.0 ... 04 Dec ............... -1.2 on 30 Jan 1976
1977 ... 20.0 ... 05 July .................... -1.8 ... 12 Jan ................ -2.0 on 04 Dec 1976
1978 ... 19.6 ... 01 June ................... -3.5 ... 31 Dec ............... -3.3 on 11 Feb 1978
1979 ... 19.5 ... 12 Aug .................... -4.3 ... 28 Jan ................ -4.3 on 28 Jan 1979
1980 ... 20.7 ... 05 June ................... -1.9 ... 14 Jan ............... -1.9 on 14 Jan 1980
1981 ... 20.1 ... 05 Aug .................... -8.5 ... 12 Dec ................ -0.7 on 14 Feb 1981
1982 ... 21.3 ... 05 June ................... -7.6 ... 14 Jan ................ -8.5 on 12 Dec 1981
1983 ... 22.7 ... 13 July ..................... -1.5 ... 23 Nov ............... -1.0 on 10 Feb 1983
1984 ... 21.6 ... 21 Aug .................... -1.9 ... 15 Feb ............... -1.9 on 15 Feb 1984
1985 ... 20.2 ... 01 Oct ..................... -4.4 ... 17 Jan ................ -4.4 on 17 Jan 1985
1986 ... 21.9 ... 28 June ................... -4.6 ... 10 Feb ............... -4.6 on 10 Feb 1986
1987 ... 20.9 ... 20 Aug .................... -7.7 ... 12 Jan ................ -7.7 on 12 Jan 1987
1988 ... 19.3 ... 07 Aug .................... -0.1 ... 22 Nov ................ -0.7 on 10 Dec 1987
1989 ... 23.1 ... 22 July .................... -0.3 ... 26 Nov .................-0.1 on 22 Nov 1988
1990 ... 24.4 ... 03 Aug .................... +0.5 ... 15 Dec ............... -0.3 on 26 Nov 1989
1991 ... 20.6 ... 11 & 29 July ............ -4.7 ... 07 Feb ................ -4.7 on 07 Feb 1991
1992 ... 20.4 ... 29 June ................... -2.3 ... 22 Jan ................ -3.5 on 12 Dec 1991
1993 ... 19.4 ... 10 June .................. -2.9 ... 23 Nov ................ -2.4 on 29 Dec 1992
1994 ... 20.6 ... 24 July .................... -1.9 ... 14 Feb ................ -2.9 on 23 Nov 1993
1995 ... 24.9 ... 01 Aug .................... -4.7 ... 28 Dec ................ -1.2 on 3 Jan 1995
1996 ... 22.1 ... 19 Aug .................... -2.2 ... 07 Feb ................ -4.7 on 28 Dec 1995
1997 ... 22.6 ... 11 Aug .................... -2.6 ... 01 Jan ................ -2.6 on 01 Jan 1997
1998 ... 20.5 ... 11 Aug .................... -0.3 ... 06 Dec ............... +0.2 on 01 Feb 1998
1999 ... 21.7 ... 31 July .................... -2.2 ... 20 Dec ................-0.3 on 06 Dec 1998
2000 ... 21.5 ... 19 June .................. -1.9 ... 29 Dec ................ -2.2 on 20 Dec 1999
2001 ... 23.0 ... 29 July .................... -1.2 ... 16 Jan ................ -1.9 on 29 Dec 2000
2002 ... 21.6 ... 29 July .................... -1.8 ... 01 & 02 Jan ........ -1.8 on 1 & 2 Jan 2002
2003 ... 23.9 ... 09 Aug .................... -1.4 ... 07 Jan ................ -1.4 on 07 Jan 2003
2004 ... 21.7 ... 08 Aug ................... +0.5 ... 29 Jan & 20 Dec.. +0.5 on 30 Dec 2003 & 29 Jan 2004
2005 ... 22.1 ... 19 June .................. -1.0 ... 29 Dec ................ +0.4 on 23 Feb 2005
2006 ... 24.5 ... 19 July .................... -1.4 ... 02 Feb ................ -1.4 on 2 Feb 2006
2007 ... 19.7 ... 05 Aug .................... -1.5 ... 07 & 08 Feb ....... -1.5 on 7 & 8 Feb 2007
2008 ... 21.1 ... 28 July .................... -2.5 ... 31 Dec ................ -0.5 on 21 Dec 2007
2009 ... 22.5 ... 01 July .................... -3.0 ... 06 Jan .................-3.0 on 6 Jan 2009
2010 ... 19.9 ... 10 July .................... -7.0 ... 20 Dec ................ -4.6 on 7 Jan 2010
2011 ... 22.0 ... 27 June ................... -1.4 ... 29 Jan ................ -7.0 on 20 Dec 2010
2012 ... 20.3 ... 18 Aug .................... -3.0 ... 04 Feb ............... -3.0 on 4 Feb 2012
2013 ... 22.7 ... 01 Aug .................... -2.9 ... 16 Jan ................ -2.9 on 16 Jan 2013

2014 ... 21.0 ... 18 July .................... +0.8 ... 29 Dec ............... +2.5 on 23 Nov 2013

2015 ... 24.6 ... 01 July ..................... -0.3 ... 2 Feb .................. -0.3 on 2 Feb 2015

2016 ... 23.5 ... 20 July ..................... +0.3 .. 16 Jan ................ +0.3 on 16 Jan 2016

2017 ... 21.9 ... 19 June ....................--0.4 ... 12 Dec ............... --0.1 on 26 Jan 2017

2018 ... 22.5 ... 27 July ......................--3.8 ... 1 Mar ................. --3.8 on 1 Mar 2018

2019 ... 25.2 ... 25 July ..................... --1.8 .. 31 Jan  ................. --1.8 on 31 Jan 2019

2020 ... 25.1 ... 12 Aug ..................... --1.3 .. 31 Dec ................. +1.5 on 2 Dec 2019 

2021 ... 22.2 ... 22 July ...................... --2.1 .. 11 Feb (so far) .. --2.1 on 11 Feb 2021

 

Edited October 1, 2021 by Roger J Smith

[Roger J Smith]

Summary of the Annual extremes (see last two posts for tables)

Highest Daily Mean for each of 250 years 1772 to 2021

 

The range of dates is 15 May (1833, tied) to 01 October (1985).

The count by month (assigning 0.5 to tied values in different months) is

MAY .. 3.5 (4)

JUN .. 46.0 (47)

JUL .. 111.5 (114) 

AUG .. 75.0 (76)

SEP .. 13.0 (14) 

OCT ... 1.0 (1)

The number in brackets gives the number of years in which the month at least shares in the category of highest daily mean. For example, August had two cases of dates tied with other months, so the count was 74.0, the number of cases was 75. A case where a month has more than one day does not affect this, there were about half a dozen such cases, usually consecutive days or nearby days in a warm spell. One year actually had three days tied, all in July.

Despite July coming ahead of August in this count, the highest frequency on any one date is 9 on the 12th of August. Other dates that scored five or more include 5 June (5), 5 July (7), 9, 12, 16, 17 July (all made it to five with one tie included), 20 (7), 22, 24 and 29 July (all at 6 but 22 July now goes to 7 as 2021 confirmed) , and 5 Aug (5). There seems to be a little flicker of warmth near the end of September into the first of October given that one case fell in the period 15-26 September, then three from 27 Sep to 1 Oct.

Periods with very few annual extremes within the summer months include 11-14 June (zero) and from 21 to 26 August which totalled 5.0 including two ties. The frequency after that period is not much greater but given the seasonal distribution that part of August stands out a bit. There are ten cases between 27 August and 2 September.

The trend of these values is gradually increasing although the period 1975 to 2006 stands out in recent times, since 2007 (to 2012 as originally posted) of course the performance of this index is nothing out of the ordinary as the long-term average is 20.9 while the average since 1901 is 21.1 ... in the warmer period 1975 to 2006 the average was 21.9. The past six summers (meaning 2007-12) have averaged 20.9, equal to the long-term average. The period 2013-16 then warmed to 23.0 so the past ten years have continued near the 1975-2006 pace, at 21.7.

The highest extremes are probably a lot better known to weather "buffs" than the lowest annual max values, so I had a look at those. 1860 and 1862 stand out with 17.2 and 17.3 the best those years could manage. A more recent period of cool summers appears 1962-66, five years when the value 20.0 was never achieved.

Frequency in various 30-year intervals is shown here:

Interval _________ May __ Jun __ Jul __ Aug __ Sep __ Oct 

1772-1801 ________0 ____8.5___12.5____8 ____1 ____0

1802-1831 ________0 ____ 6 ___17.0*___4.5 __2.5 ___ 0 __ (* two 0.5 incl for July)

1832-1861 ________0.5___5.5 ___14.5 ___9.5 __ 0 ____0

1862-1891 ________0 ____ 2 ____ 12 ___ 14 ___ 2 ____0

1892-1921 ________1 ____ 7 ____ 10 ____ 8 ___ 4 ____0

1922-1951 ________ 2 ____ 6 ____14 ____ 7 ___ 1 ____0

1952-1981 ________ 0 ____ 3 ____14.5 __10 ___ 2.5 __ 0

1982-2021 ________ 0 ____ 8 ____ 16 ___14 ___ 0 ___ 1 __ (40 years)*

... The last year that had tied values in different months was 1956. The last year that had a maximum in May was 1944. 

* ... This table to be adjusted when it is known whether 22 July (22.2) or 8 Sep (prov 22.1) or both are warmest of 2021. 

 

 

__Annual Minimum Daily Means 1772-2021 and coldest of winter seasons__

Two notes here, 2021 is of course not yet over so the value of -2.2 in February is not "set" and this table could therefore change. It is settled as the coldest of winter 2020-21. Also, 1786 could have had a value in December, the data are missing, but it is not as likely to be the annual 1786 minimum as perhaps the winter seasonal minimum for 1786-87 which I have assigned to December 1786 on probability (see the table for that period for details).

Not every annual minimum is a winter minimum, but there are two cases where a year managed to secure two different coldest of winter from tied values at either end of the year. There are numerous cases where a year claims two winters (such as 2019), as well as those where it claims no winters (for example, 2020).

The following count for coldest mean daily per year follow the same logic as the max, the number includes 0.5 for ties in different months, and the number in brackets gives the number of times the month at least had a share.

NOV ... 13.5 (14)

DEC ... 75.5 (77)

JAN .. 105.5 (108)

FEB ... 50.0 (51) _ 2021 to be confirmed after Nov-Dec

MAR ... 5.5 (6)

Despite the fact that January and February CET means are often very close in 30-year periods and not that different (3, 4) over a longer term, January and even December score higher than February on this index. A small part of the reason is length of month, February has only 90% of the time available, but probably the bigger reason is solar angle, a cold February day can achieve a somewhat higher maximum.

The most frequent date for the annual minimum is 1 Jan (count 8.0, 9 instances, so twice this date tied both times with 2 Jan). 28 December had a count of 7.5 with 8 instances. 22 December scored six while 23 January scored five and otherwise the count remains fairly even at about 2-4 per day through the heart of the winter season which appears to be 15 Dec to 15 Feb.

In the heart of the winter season, the dates that were least likely to be the coldest of the year include 3 and 5 Feb around the time when the annual temperature curve shows a bit of a spike.

The range of dates is 9 Nov (1921) to 21 March 1872 (later tied on 11 Dec).

The average of this annual minimum over the entire 248-year period is -3.7, and this has risen to reach -3.0 since 1901. From 1988 to 2007 a two-decade mean of -1.6 was observed, but this has fallen back to -2.0 for the twenty-five years 1988-2012. For a ten-year period 1795 to 1804, the average was as low as -6.0 ... and this appears to be about the same value that other colder periods have had, although most of those did not last ten years, for example, 1890-95 (six years) managed an average of -6.3. The ten-year average of -4.6 from 1978 to 1987 was not often bettered in the colder 19th century or late 18th century.

Meanwhile, the winter seasonal count looks very similar, although about one-third of winter seasonal minimum values are not annual minima for their particular year. The various possibilities seem to cancel out almost equally, but February does score a bit higher.

NOV ... 15 (16)

DEC ... 70.0 (71)

JAN .... 99.0 (101)

FEB ... 56.0 (57)

MAR ...10.0 (10)

The range in this variable runs from 12 Nov 1919 (for winter 1919-20) to 21 March 1899 (coldest of winter 1898-99).

Since quite a few winters use up two cold annual values in the annual count, the long-term mean of this seasonal index is higher, at -3.5, and has risen to -2.9 since 1901. The recent winter season values are more similar to the annual values.

This is the distribution of months in which the winter minimum value occurred (including ties at 0.5 for each) ...

Interval _______ NOV ___ DEC ___ JAN ___ FEB ___ MAR 

1772-1801 ______ 0 _____ 9 _____ 13.5 ____ 5.5 ____ 2 __ (1786-87 counted for Dec)

1802-1831 _____ 0.5 _____8 ______16.5 ____5 ______0

1832-1861 _____ 1 ______ 7 ______ 13 _____ 8 _____ 1 __ (Dec and Jan shared 2 each)

1862-1891 _____ 1 ______14 ______ 8.5 ____ 5.5 ____1

1892-1921 _____ 4.5 _____8.5 _____ 9.0 ____ 7 _____ 1 __ (Jan shared 2, one each with Nov and Dec)

1922-1951 _____ 1 ______ 9 ______ 11 _____ 6 _____ 3

1952-1981 _____ 3 ______ 3 ______ 15 _____ 8 _____ 1

1982-2021 _____ 4 ______11.5 ____12.5 ____11 _____1

_____________________________________________________

Note that December actually dominated around the end of the 19th century, and has begun to pick up again recently after falling well behind in the mid-20th century. 

Edited October 1, 2021 by Roger J Smith

[Roger J Smith]

Continuing to transfer files from the old CET records thread to this newer version ... this is a list of hot spells adapted from a post originally made by Aderyn Coch. 

 

Hot spells of 10 days or longer, all days 18.0 or higher -- chronological order 1772 to 2019

 

DURATION _________________________DATES (continuously above 18.0) & MEAN CET

_____ RANK for LENGTH __ RANK for AVG CET (first 23) 

 

11 days ____ 19t ________ xx ______ 5-15th August 1773 __ 19.65

13 d _______ 13 ________ xx _______8-20th July 1783 __ 19.48

10 d _______ 24t ________ 3 ______ 11-20th July 1808 __ 21.40

16 d _______ 5t ________ 16 _______ 26th June - 11th July 1826 __ 20.26

12 d_______ 14t ________20 _______ 11-22nd June 1846 __ 19.94

14 d _______ 9t ________ 12 _______ 4-17th July 1852 __ 20.38

14 d _______ 9t ________ 14 _______ 8th-21st August 1893 __ 20.36

11 d ______ 19t ________ 18 _______ 18-28th July 1900 __ 19.98

10 d ______ 24t ________ 17 _______ 25th July -- 3rd August 1911 __ 20.08

14 d _______ 9t ________ 11 _______ 7-20th July 1921 __ 20.45

11 d ______ 19t _________10 ________5-15th July 1923 __ 20.66

12 d ______ 14t ________ xx _______31st July -- 11th August 1938 __ 19.09

10 d ______ 24t ________ 22t ______ 25th July -- 3rd August 1947 __ 19.71

12 d ______ 14t ________ 15 _______12-23rd August 1947 __ 20.28

12 d ______ 14t ________ xx ________7-18th July 1955 __ 19.43

11 d ______ 19t ________19 _______ 16-26th August 1955 __ 19.95

20 d _______ 1 ________ 13 _______ 27th July -- 15th August 1975 __ 20.35

18 d _______2t ________ 1 ________ 22nd June -- 9th July 1976 __ 22.04

16 d ______ 5t ________ xx ________11-26th August 1976 __19.05

15 d ______ 7t _________ 8 ________4-18th July 1983 __ 20.81

10 d _____ 24t ________ xx _______ 22-31st July 1983 __19.45

10 d _____ 24t ________ xx _______ 17-26th August 1983 __18.98

10 d _____ 24t _________ 9 _______ 17-26th July 1989 __ 20.67

14 d ______ 9t _________ 6 ________ 24th July -- 6th August 1995 __21.04

18 d ______ 2t _________ 7 ________ 6-23rd August 1997 __ 20.84

10 d _____ 24t _________ 2 ________4-13th August 2003 __ 21.69

12 d _____ 14t ________ 22 ________1-12th August 2004 __19.71

15 d ______ 7t _________ 4 ________ 16-30th July 2006 __ 21.21

17 d ______ 4 _________ xx ________ 13-29th July 2013 __19.56*

11 d _____ 19t _________21 ________ 17-27th July 2014 __19.90

10 d _____ 24t _________ 5 _________ 5-14 August 2020 __ 21.20

 

*with one day at 17.7 (30th July) this spell went to 21 days (ending 2 Aug) same CET of 19.56

__________________________________________________

 

NOTES:

Ranking for mean temp showed only the top ten in original version because it was considered likely that below that range, the spells shown here have been matched by more variable spells (not consecutively > 18.0) of similar durations. In this new edition I have also ranked 11 to 22 and searched data for any non-qualifying 10-day spells that would rank top 50. ... those appear in the list below (e.g. July 2018). 

 The 1976 spell is even more remarkable when you consider that a further week of hot weather occurred after one day failed to reach 18.0. 

The following list compares 10-day intervals but leaves out any within same hot spells that are slightly lower averages than the peak from any given spell. It includes the hottest 10 days of each year 1772 to 2019. Entries below 19.50 are grouped together without dates and to one decimal only.

Second heat waves of given years are noted in green type.

 1 __ 23.19 __ 1976 __ 28 June to 7 July (days 7 to 16 of the 18 day interval listed above).**

 2 __ 21.96 __ 2006 __ 18-27 July (days 3 to 12 of the 15 day interval listed above).

 3 __ 21.93 __ 1995 __ 25 July to 3 Aug (or 26 Jul to 4 Aug) .. days 2 or 3 to 11 or 12 of 14 day interval above.

 4 __ 21.69 __ 2003 __ 4-13 August (as listed above).

 5 __ 21.63 __ 1983 __ 8-17 July (days 5 to 14 of 15 day spell listed above).

 6 __ 21.40 __ 1808 __ 11-20 July (interval listed above).

 7 __ 21.36 __ 1975 __ 31 July to 9 August (days 5 to 14 of the 20 day interval listed above). 

 8 __ 21.20 __ 2020 __ 5 to 14 August (interval listed above)

 9 __ 21.09 __ 1997 __ 7-16 August (days 2 to 11 of 18 day interval listed above).

10 __ 20.93 __ 1825 __ 11-20 July (17.8 on 11th then nine days 18.0 or higher to 20th, would have ranked 6th above).

11 __ 20.92 __ 1923 __ 5-14 July (first ten days of the eleven day interval listed above).

12 __ 20.81 __ 1893 __ 9-18 August (days 2 to 11 of the 14 day period listed above).

13 __ 20.77 __ 1826 __ 26 Jun - 5 July (first ten of the sixteen days listed above).  

14t__ 20.67 __ 1852 __ 4-13 July (first ten of the fourteen day spell listed above).

14t__ 20.67 __ 1989 __ 17-26 July (as listed above). 

16 __ 20.61 __ 1947 __ 13-22 August (2nd to 11th days of 12 day interval listed above).

17 __ 20.60 __ 1948 __ 24 July to 2 August (25th to 31st July and 2nd Aug above 18, 26th to 30th average 23.1)

18 __ 20.53 __ 1995 __ 13-22 August (10-23 August was a 14 day interval average 20.44 prevented from appearing by 17.9 14th).

19 __ 20.49 __ 1921 __ 10-19 July (4th to 13th days of 14 day interval listed above).

20 __ 20.30 __ 1793 __ 7-16 July (17.6 on 9th prevented 5th to 17th July 13 days 20.12 avg from appearing in list above)

21 __ 20.20 __ 1868 __ 13-22 July (17.7 on 13th and 17.0 on 17th prevented this ten day interval from appearing in list above)

22 __ 20.12 __ 1900 __ 18-27 July (first ten days of the eleven day interval listed above).

23t__ 20.12 __ 1911 __ 20-29 July (25 July-3 August 20.08 listed above, 23rd and 24th July were below 18.0). 15 day avg was 19.82.

23t__ 20.12 __ 1955 __ 17-26 August (2nd to 11th days of 11-day period listed above).

25 __ 20.11 __ 1846 __ 13-22 Jun (days 3 to 12 of 12 day spell listed above) -- note a second hot spell later in 1846 below

26 __ 20.10 __ 1911 __ 7-16 August (not listed above due to 15th 17.6, 16th 16.2, but 7-20 Aug was 14 day interval avg 19.75)

27 __ 20.07 __ 2013 __ 16-25 July (days 4 to 13 of the 17-day interval listed above).

28 __ 20.05 __ 2014 __ 17-26 July (first ten of the eleven day interval listed above). 

29 __ 19.92 __ 2018 __ 19-28 July (days two and ten of this interval were 17.8 and 17.5, preventing it from being listed above).

30 __ 19.89 __ 2004 __ 1-10 August (first ten days of twelve day spell listed above).

31 __ 19.80 __ 1773 __ 5-14 August (first ten days of eleven day spell listed above).

32 __ 19.79 __ 1818 __ 18-27 July (17.7 on 20th prevented 14th to 27th July 14 days 19.56 avg from appearing in list above)

33 __ 19.78 __ 1990 __ 27 July to 5 August (first, third and last of these days below 18, core of heat 1-4 August avg 22.5).

34 __ 19.74 __ 2019 __ 22-31 July (core of heat 22-26 July).

35 __ 19.72 __ 1876 __ 12-21 Aug (16.7 on 18th and 17.1 on 20th prevented this interval from appearing in list above)

36 __ 19.71 __ 1947 __ 25 July to 3 August (interval listed above)

37 __ 19.70 __ 1859 __ 10-19 July (17.0 on 14th, 17.6 on 21st prevented 10th to 22nd July 13 days 19.46 avg from appearing in list above)

38 __ 19.67 __ 1941 __ 6-15 July (16.7 on 15th prevented this interval from appearing in list above). 

39 __ 19.65 __ 1955 __ 8-17 July (2nd to 11th days of 12-day interval listed above).

40 __ 19.65 __ 1957 __ 27 June to 6 July (17.2 on 2nd July prevented this interval from appearing in list above).

41 __ 19.64 __ 1846 __ 29 July to 7 August (16.6 on 2nd Aug prevented 28 Jul to 7 Aug 11 days 19.54 avg from appearing in list above)

42 __ 19.62 __ 1934 __ 4-13 July (6 to 11 July above 20, 4th at 17.2 prevented the ten days from appearing in list above). 

43 __ 19.60 __ 2001 __ 26 June to 5 July (28-30 June below 18 prevented 25 June to 7 July -- 13 d -- avg 19.52 from appearing in list above).

44 __ 19.59 __ 1999 __ 29 July to 7 August (first and last day of ten day interval below 18 prevented this from appearing in list above).

45 __ 19.56 __ 1847 __ 6 to 15 July (three days below 18.0 8th to 10th in a span of 12 days 5 to 16 July that averaged 19.48).

46t__ 19.54 __ 1830 __ 23 July - 1 August (24th and 1st Aug were below 18.0 so this does not appear in list above). 

46t__ 19.54 __ 2003 __ 9-18 July (8-19 July was 12d int avg 19.42 prevented by 11th and 12th being sub 18 from appearing in list above).

46t__19.54 __ 2009 __ 26 to 5 July (heat mostly 29 June to 2 July). 

49 __19.53 __ 1783 __ 8-17 July (first ten of the 13 days listed above).

50 __ 19.51 __ 1933 __ 1-10 August (only 3-7 August were above 20).

51t__ 19.49 __ 1868 __ 1-10 August (2-6 and 10th were 20+ but 7-9 were all below 18.0).

51t__19.49 __ 2006 __ 28 June to 7 July (heat mostly 1-6 July, several days below 18 to start this interval).

53 __ 19.46 __ 1878 __ 15-24 July (only 17th to 22nd were 18.0 or above, 18th to 22nd 20+). 

54 __ 19.45 __ 1983 __ 22-31 July (listed above)

19.4 __ 1779, 1856, 1870, 1926, 2005, 2016

19.3 __ 1800, 1817, 1871, 1884, 1897, 1901, 1938, 1959, 1984

19.2 __ 1872, 1935, 1949

19.1 __ 1778, 1932, 1943, 2008

19.0 __ 1857, 1994

18.9 __ 1797, 1869, 1874, 1898, 1969, 1982

18.8 __ 1792, 1794, 1906, 1937, 2017

18.7 __ 1831, 1842, 1850, 1899, 1925

18.6 __ 1775, 1781, 1828, 1912, 1936, 2012

18.5 __ 1822, 1865, 1880, 1885, 1904, 1929, 1952, 1953, 1986, 1987

18.4 __ 1798, 1802, 1807, 1837, 1858, 1940, 1942, 1967, 1971

18.3 __ 1772, 1780, 1819, 1835, 1836, 1887, 1905, 1919, 1930, 1973, 1991, 1996

18.2 __ 1820, 1867, 1881, 1939, 1944, 1945, 1970, 2002, 2015

18.1 __ 1795, 1803, 1827, 1875, 1886, 1909, 2010  

18.0 __ 1866, 1873, 1917, 1960, 1961, 1977, 1998, 2000

17.9 __ 1814, 1950, 1972, 2011

17.8 __ 1787, 1824, 1840, 1980

17.7 __ 1777, 1804, 1834, 1894, 1896, 1916, 1958

17.6 __ 1801, 1832, 1895, 1902, 1946, 

17.5 __ 1790, 1821, 1844, 1855, 1863, 1928, 1964

17.4 __ 1774, 1776, 1782, 1791, 1838, 1908, 1978, 1979

17.3 __ 1785, 1788, 1789, 1854, 1861, 1883, 1918, 1927, 1992

17.2 __ 1786, 1810, 1914

17.1 __ 1796, 1806, 1811, 1812, 1849, 1851, 1864, 1924, 1966

17.0 __ 1784, 1805, 1833, 1843, 1891, 1951, 1968

16.9 __ 1877, 1889, 1903

16.8 __ 1799, 1956, 1963, 1981, 1985

16.7 __ 1845, 1892, 1910, 1922, 1993

16.6 __ 1882, 1965

16.5 __ 1813, 1815, 1848, 1907, 1988

16.4 __ 1853, 1890, 1915

16.3 __ 1829

16.2 __ 1809, 1913, 1931, 2007

16.1 __ 1888, 1920

16.0 __ 1839, 1954

15.9 __ 1974

15.8 __ 1841, 1879

15.7 __ 1962

15.5 __ 1860

15.4 __ 1823

15.2 __ 1862

14.8 __ 1816

________________________________________________

note: 19.32 for 26 May to 4 June 1947 almost made it as a third interval for that year. 

** 17-26 Aug 1976 average 19.34, days 7-16 of second 1976 spell

 

Edited September 1, 2020 by Roger J Smith

[Roger J Smith]

Longest Cold Spells

(consecutive days with means 0.0 or lower)

NOTE -- Data from 1772 to present, there were probably very long cold spells in years such as 1684, 1709 and 1740 but we don't have the daily details for those.

This table includes all cases with 10 or more such days.

Note: This table was constructed using CET legacy values. A check has been made against CET v2.0 and the table is now rank ordered to v2.0 values. Any differences are now noted in italics. The absence of any notes implies that the cold spell in question is still valid for both v2.0 and legacy data. One spell was extended by five days (Dec 1890) when 27th changed from +0.6 to -0.1. And another spell had a day removed (1881) as a value of -1.6 changed to +0.1 at the previous end of the spell. Also, the coldest and average values in v2.0 are now shown in the table, numbers in brackets are now the legacy values where different (absence of such numbers implies they are identical). Since the change to v2.0 only includes years 1853 to present, any cold spells 1772-1852 will have no editing required.

 

DAYS ___ Duration of Days 0.0 or lower ______________Coldest _____ Average

v2.0 leg _______________________________________________v2.0 (leg) ___ v2.0 (leg)_____

32 ... ... 27 Dec 1813 - 27 Jan 1814 .............................. -- 6.7 ...... ...... -- 3.2

26 ... ... 7 Jan - 1 Feb 1776 ............................................ -- 7.5 ...... ...... -- 3.0

23 (18) . 9 -31 Dec 1890 (9-26 Dec in CET leg) ............. --5.7 (--6.8) .... --1.9 (-2.1)^

22 ... ... 5 - 26 Feb 1947 ................................................. --6.6 (-- 6.7) ..-- 2.5 ****

20 ... ... 7 - 26 Jan 1963 ................................................... --8.4 ...... ...... -- 3.6 ***

19 (20) . 8 -26 Jan 1881 (8-27 Jan in CET leg) ............... -- 8.0 (-8.1) ..... --4.7 (-- 4.8)^

18 ... ... 6 - 23 Feb 1855 ..................................................--7.2 (-- 7.5) ... -- 3.7

18 ... ... 9 - 26 Jan 1823 .................................................. -- 8.9 ...... ...... -- 3.0

17 ... ... 10 - 26 Jan 1795 ................................................ -- 8.9 ...... ...... -- 4.0

15 ... ... 21 Dec 1870 - 4 Jan 1871 ................................. -- 6.7 (--6.9) .. -- 3.5 (-3.6)

15... ... 10-24 Jan 1940 ................................................... -- 7.0 (--7.1) ... --3.4 (-- 3.3)

15 ... ... 24 Dec 1892 - 7 Jan 1893 ................................. --4.7 (-- 5.0) ... --3.2 (-- 3.3)

15 ... ... 18 Jan - 1 Feb 1784 ........................................... -- 3.7 ...... ...... -- 2.1

14 ... ... 8 - 21 Jan 1838 ................................................. -- 11.9 ...... ...... -- 5.1

14 ... ... 5-18 Feb 1895 ................................................... -- 8.5 (--8.3) .. -- 4.8** 

14 ... ... 3-16 Jan 1820 ..................................................... -- 8.5 ...... ...... -- 3.6

14 ... ... 21 Jan - 3 Feb 1780 ........................................... -- 3.6 ...... ...... -- 1.0

13 ... ... 26 Jan - 7 Feb 1954 ........................................... --4.9 (-- 5.0) ... -- 2.5  

13 ... ... 17 - 29 Dec 1860 ............................................... --4.0 (-- 3.7) ... --2.3 (-- 2.1) ^^ 

13 ... ... 6 - 18 Feb 1986 .................................................. --4.5 (-- 4.6) ... --1.4 (-- 1.6) ^^

13 ... ... 14 - 26 Feb 1956 ................................................ --3.2 ...... ...... -- 1.6

13 ... ... 29 Dec - 10 Jan 1811 ......................................... -- 3.6 ...... ...... -- 1.5

12 ...... 6-17 Jan 1987 ...................................................... -- 7.7 ..... ....... -- 2.8

12 ... ... 23 Dec 1962 - 3 Jan 1963 ................................. -- 3.6 ...... ...... -- 2.2 ***

12 ... ... 18 - 29 Jan 1880 ................................................. --4.4 (-- 4.3) .. -- 2.0 (--2.1)

12 ... ... 3 - 14 Feb 1991 .................................................. --4.6 (-- 4.7) .. --1.8 (-- 1.9)

12 ... ... 25 Dec 1853 - 5 Jan 1854 .................................. --4.9 (-- 5.0) .. -- 1.8

12 ... ... 30 Nov - 11 Dec 1796 ....................................... -- 4.7 ...... ...... -- 1.8

12 ...... 17 - 28 Feb 1955 ................................................. -- 3.3 ...... ...... -- 1.7

11 ...... 17 - 27 Dec 2010 ................................................. -- 7.0 ...... ...... -- 3.9

11 ...... 11 - 21 Jan 1867 ................................................... --4.9 (-- 5.0) .. --2.8 (-- 2.9)

11 ... ... 1 - 11 Feb 1917 ................................................... --6.2 (-- 7.2) .. -- 2.8 *

11 ... ... 9 - 19 Feb 1985 ................................................... --4.0 (-- 4.1) .. --2.6 (-- 2.7) 

11 ... ... 2-12 Jan 1879 ...................................................... --5.7 (-- 4.8) .. --2.5 (-- 2.3)

11 ... ... 6 - 16 Jan 1850 .................................................... -- 2.8 ...... ...... -- 1.4

11 ... ... 25 Dec 1820 - 4 Jan 1821 ................................... -- 3.3 ...... ...... -- 1.3

11 ... ... 11 - 21 Feb 1853 .................................................. --3.1 (-- 3.2) .. -- 1.2

11 ... ... 9 - 19 Feb 1940 .................................................... --2.6 (-- 2.5) .. -- 1.1

10 ...... 6-15 Jan 1982 ........................................................ --7.5 (-- 7.6) .. -- 4.0

10 ... ... 8 - 17 Jan 1826 .....................................................-- 6.9 ..... ...... -- 3.7

10 ... ... 20 - 29 Jan 1945 .................................................. --7.5 (-- 7.6) .. -- 3.5

10 ... ... 5 - 14 Dec 1844 ................................................... -- 5.5 ...... ...... -- 2.7

10 ... ... 8 - 17 Dec 1878 ....................................................--5.5 (-- 5.3) .. --2.8 (-- 2.9)

10 ... ... 16 - 25 Jan 1829 ................................................... -- 4.8 ...... ...... -- 2.8

10 ... ... 14 - 23 Jan 1809 ................................................... -- 5.1 ...... ...... -- 2.4

10 ... ... 24 Jan-2 Feb 1947 ................................................. -6.4 ...... ...... -2.1 ****

10 ... ... 8-17 Dec 2022 ........................................................ -4.4 ...... ...... -1.9 

10 ... ... 24 Dec 1836 - 2 Jan 1837 .................................... -- 3.3 ...... ...... -- 1.3

10 ... ... 23 Dec 1837 - 1 Jan 1838 ..................................... -- 2.7 ...... ...... -- 1.4

10 ... ... 21 - 30 Jan 1917 ..................................................... --2.0 (-- 1.8) .. -- 1.2 (--1.1) *

 

__________________________________________________

^ The 1890 spell gained five days in v2.0 when 27th was adjusted down from +0.6 to -0.2 allowing 28th-31st to be added. This was despite a move in the other direction on 24th from -0.1 (legacy) to -0.0 (v2.0). The averages shown are for the two different lengths of cold spell in each data base. 

^ The 1881 spell lost one day in v2.0. The averages shown are for the two different lengths of cold spells, if the lost day were included (0.1 in v2.0 on 27th) the averages would read --4.5 (--4.8). 

^^ After three days just above freezing, another nine days 2-10 Jan 1861 were subzero. The mean for 25 days from 17 Dec to 10 Jan was -1.8, and it stayed quite cold to 18 Jan, mean to there for 33 days was -1.6. 

^^ The 1986 cold spell could be extended to 26 days if 0.2 on 19th Feb, 0.4 on 28th and 0.2 on 2nd March are included, the mean for this longer interval is -1.3 C.

* Except for +0.2 (+0.3 leg) on 31 Jan 1917, a 22 day spell avg --1.8 C lasting 21 Jan to 11 Feb.

** A longer spell of 24 days with +0.3 (was +0.4 legacy) as warmest, 26 Jan - 18 Feb 1895, avg --3.7 C.

*** Although there were only two spells in winter 1962-63 that qualified for this list, note that the period of 35 days that includes the two, 23 Dec to 26 Jan, averaged -2.7 C and 70 days to 2 March averaged -- 1.5 C. All of this remained valid in v2.0 as changes to 1963 data were generally nil for most days.

**** The 45-day period 23 Jan to 8 Mar 1947 averaged --1.9 C. A second cold spell of 10 days 24 Jan to 2 Feb was separated from this longer spell by two days at 0.7 (v2.0 and legacy). The overall mean for 24 Jan to 26 Feb, a 34-day interval with the two-day interruption, was -2.2 C. 

>> RECENT NEAR MISSES & EXPANSION OF 1986 FROM LIST <<

25 Nov to 4 Dec 2010 averaged -- 1.7 C and 25 Nov to 8 Dec averaged -- 1.7 C but these periods failed by a slight margin to make the list (25 Nov was +0.2 (+0.3 leg) and 5 Dec was +0.3 (+0.4 leg)).

The 26-day period from 6 Feb to 3 Mar 1986 averaged -- 1.3 C.

1 to 10 Jan 2010 averaged --1.9 C but failed to make the list because 2 Jan was +0.3 C.

8-26 Dec 1981 averaged -- 2.3 C.

___________

note: when this was first posted, we did not have daily data for Dec 1786. It turns out that there was almost a qualifying spell in Dec 1786, nine days from 18th to 26th averaged -2.0 and -5.5 on 26th was coldest. The closest reading at either end was +0.9 on 17th. It's possible that I may add 8-9 day spells in the future. 

Edited January 21, 2023 by Roger J Smith

[Roger J Smith]

LARGEST CHANGES IN DAILY CET (from day to day)

I ran a program on the daily CET values to find out the largest changes from one day to the next, over the period 1772-present.

There were three days that warmed by more than 10 C deg, they were:

Feb 7, 1830 ... 11.2 warmer (4.8 from -6.4)

Jan 4, 1836 ... 10.7 warmer (8.2 from -2.5)

Jan 21, 1838 ... 10.5 warmer (-1.4 from coldest day on record -11.9)

These cover the largest increases for Jan and Feb. The rest of the monthly records are as follows:

Mar. 12, 1805 ... 8.2 warmer (11.5 from 3.3)

Apr. 15, 1868 ... 7.4 warmer (12.9 from 5.5)

May 17, 1854 ... 7.1 warmer (13.1 from 6.0)

June 1, 1869 ... 6.9 warmer (14.4 from 7.5)

July 9, 1903 ... 6.9 warmer (20.2 from 13.3)

Aug. 27, 1864 ... 6.2 warmer (15.0 from 8.8 )

Sep. 4, 1869 ... 7.4 warmer (18.5 from 11.1)

Oct. 21, 1833 ... 7.0 warmer (12.9 from 5.9)

Nov. 26, 1797 ... 9.6 warmer (9.8 from 0.2)

Dec. 8, 1847 ... 8.9 warmer (10.7 from 1.8 )

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

Meanwhile, the largest day to day falls in CET daily means were all less than 10 degrees, the largest was 9.9 degrees in November 1836.

Monthly records are ...

Jan. 6, 1982 ... 8.5 (-0.1 from 8.4)

Feb. 26, 1780 ... 8.0 (-2.4 from 5.6)

Mar. 5, 1821 ... 8.5 (0.7 from 9.2)

Mar. 28, 1777 ... 8.5 (6.3 from 14.8 )

Apr. 16, 1779 ... 8.5 (7.3 from 15.8 )

May 11, 1773 ... 9.1 (4.1 from 13.2)

June 7, 1942 ... 8.3 (12.8 from 21.1)

Jul. 23, 1868 ... 8.5 (14.7 from 23.2)

Aug. 29, 1838 ... 7.2 (11.5 from 18.7)

Sep. 16, 1819 ... 8.6 (8.9 from 17.5)

Oct. 16, 1955 ... 9.3 (3.7 from 13.0)

Nov. 25, 1836 ... 9.9 (0.4 from 10.3)

Dec. 14, 1994 ... 8.9 (2.4 from 11.3)

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

Note that the majority of these monthly records were set before 1870 and only a few have occurred recently, and in the lifetime of most people reading this, no day has warmed more than 7 degrees (by mean CET), the largest increase since 1980 is 5.8 deg from 30 Nov. 1985, while there was a 6.4 deg rise on 6 Jan 1971.

March 17, 2018 (0.7) was 8.2 colder than March 16 (8.9) and came within 0.3 of breaking that month's largest drop set in 1777.

Oct 14, 2018 (11.1) was 7.4 colder than Oct 13 (record 18.5), but monthly record was 9.3 degrees from 1955.

[Roger J Smith]

Slowly but surely getting the material from the old thread into this new home with updates ...

CET normal values for every 30-year period starting with 1661-1690 ending with 1981-2010

_ (and most recent 30 years bonus) ... if lines overflow, reduce screen magnification (125% or lower should work)

 

30-yr period _____ JAN __ FEB __MAR __ APR __MAY __ JUN __JUL __ AUG __SEP __ OCT __NOV __ DEC__YEAR

 

(all data 1659-2019)_3.3 ___3.9 ___5.3 ___7.9 __ 11.2 __ 14.3 __ 16.0 __ 15.6 __ 13.3 ___9.7 ___6.1 ___4.1 __ 9.2

 

1661-1690 _______ 2.9 ___3.1 ___4.8 ___7.4 __ 11.0 __ 14.3 __ 15.8 __ 15.3 __ 12.8 ___9.4 ___5.7 ___3.4 __ 8.8

1671-1700________2.6 ___2.6 ___4.4 ___7.1 __ 10.7 __ 13.9 __ 15.5 __ 14.9 __ 12.3 ___9.0 ___5.3 ___3.3 __ 8.5

1681-1710________2.4 ___3.0 ___4.5 ___7.3 __ 10.8 __ 13.9 __ 15.5 __ 15.3 __ 12.6 ___9.0 ___5.6 ___4.0 __ 8.6

1691-1720________2.6 ___3.3 ___4.7 ___7.4 __ 10.7 __ 14.0 __ 15.8 __ 15.5 __ 12.9 ___9.1 ___5.8 ___3.8 __ 8.8

1701-1730________3.1 ___3.8 ___5.1 ___7.9 __ 11.3 __ 14.4 __ 15.9 __ 15.8 __ 13.6 ___9.5 ___6.4 ___4.0 __ 9.2

1711-1740________3.4 ___4.0 ___5.4 ___8.1 __ 11.2 __ 14.6 __ 16.0 __ 15.7 __ 13.8 ___9.7 ___6.2 ___4.1 __ 9.3

1721-1750________3.4 ___3.9 ___5.2 ___7.8 __ 11.4 __ 14.5 __ 16.0 __ 15.9 __ 14.0 ___9.6 ___6.3 ___4.2 __ 9.3

1731-1760________3.3 ___3.8 ___5.2 ___7.7 __ 11.2 __ 14.5 __ 16.1 __ 15.8 __ 13.8 ___9.4 ___5.8 ___4.2 __ 9.2

1741-1770________2.9 ___3.7 ___4.8 ___7.6 __ 11.2 __ 14.3 __ 16.0 __ 15.7 __ 13.6 ___9.2 ___5.7 ___3.9 __ 9.0

1751-1780________2.4 ___3.7 ___5.3 ___7.9 __ 11.2 __ 14.5 __ 16.1 __ 15.8 __ 13.4 ___9.3 ___5.6 ___3.7 __ 9.0

1761-1790________2.4 ___3.7 ___4.8 ___7.9 __ 11.5 __ 14.6 __ 16.1 __ 15.9 __ 13.3 ___9.2 ___5.5 ___3.7 __ 9.0

1771-1800________2.4 ___3.8 ___4.9 ___8.1 __ 11.4 __ 14.7 __ 16.3 __ 15.9 __ 13.3 ___9.2 ___5.5 ___3.5 __ 9.1

1781-1810________2.9 ___3.8 ___4.6 ___8.0 __ 11.5 __ 14.6 __ 16.1 __ 15.8 __ 13.2 ___9.4 ___5.3 ___3.2 __ 9.0

1791-1820________2.5 ___4.0 ___5.1 ___8.0 __ 11.2 __ 14.2 __ 15.9 __ 15.6 __ 13.1 ___9.5 ___5.5 ___3.2 __ 9.0

1801-1830________2.4 ___3.9 ___5.5 ___7.9 __ 11.4 __ 14.2 __ 15.8 __ 15.8 __ 13.1 ___9.8 ___5.9 ___3.6 __ 9.1

1811-1840________2.3 ___4.0 ___5.4 ___7.9 __ 11.4 __ 14.4 __ 15.7 __ 15.6 __ 13.0 ___9.8 ___6.1 ___4.0 __ 9.1

1821-1850________2.6 ___3.9 ___5.5 ___8.0 __ 11.6 __ 14.7 __ 15.7 __ 15.3 __ 13.0 ___9.6 ___6.3 ___4.5 __ 9.2

1831-1860________3.2 ___3.7 ___5.2 ___7.8 __ 11.2 __ 14.6 __ 15.7 __ 15.4 __ 13.0 ___9.6 ___5.8 ___4.3 __ 9.1

1841-1870________3.4 ___3.9 ___5.2 ___8.2 __ 11.2 __ 14.4 __ 15.8 __ 15.4 __ 13.2 ___9.6 ___5.7 ___4.3 __ 9.2

1851-1880________3.7 ___4.2 ___5.2 ___8.2 __ 10.8 __ 14.2 __ 15.9 __ 15.6 __ 13.2 ___9.7 ___5.3 ___4.1 __ 9.2

1861-1890________3.5 ___4.5 ___5.1 ___8.1 __ 10.9 __ 14.1 __ 15.8 __ 15.4 __ 13.2 ___9.3 ___5.7 ___3.8 __ 9.1

1871-1900________3.4 ___4.2 ___5.2 ___7.9 __ 10.7 __ 14.2 __ 15.8 __ 15.5 __ 13.1 ___9.0 ___6.1 ___3.7 __ 9.1

1881-1910________3.5 ___3.9 ___5.1 ___7.7 __ 10.9 __ 14.1 __ 15.7 __ 15.2 __ 13.1 ___9.3 ___6.3 ___4.0 __ 9.1

1891-1920________3.7 ___4.1 ___5.3 ___7.9 __ 11.3 __ 14.1 __ 15.7 __ 15.4 __ 13.1 ___9.4 ___6.2 ___4.5 __ 9.2

1901-1930________4.2 ___4.2 ___5.5 ___8.0 __ 11.3 __ 13.8 __ 15.8 __ 15.2 __ 13.1 ___9.8 ___5.8 ___4.5 __ 9.2

1911-1940________4.2 ___4.3 ___5.7 ___8.2 __ 11.5 __ 14.2 __ 15.9 __ 15.6 __ 13.3 ___9.6 ___6.2 ___4.6 __ 9.4

1921-1950________3.9 ___4.2 ___5.9 ___8.0 __ 11.3 __ 14.4 __ 16.3 __ 15.9 __ 13.6 __10.0 ___6.4 ___4.5 __ 9.5

1931-1960________3.5 ___3.9 ___5.9 ___8.1 __ 11.5 __ 14.6 __ 16.2 __ 16.0 __ 13.7 __10.1 ___6.8 ___4.7 __ 9.6

1941-1970________3.3 ___3.6 ___5.7 ___8.1 __ 11.4 __ 14.5 __ 16.0 __ 15.7 __ 13.7 __10.6 ___6.6 ___4.4 __ 9.5

1951-1980________3.6 ___3.7 ___5.6 ___8.0 __ 11.3 __ 14.3 __ 15.9 __ 15.6 __ 13.6 __10.5 ___6.6 ___4.7 __ 9.4

1961-1990________3.8 ___3.8 ___5.7 ___7.9 __ 11.2 __ 14.2 __ 16.1 __ 15.8 __ 13.6 __10.6 ___6.6 ___4.7 __ 9.5

1971-2000________4.2 ___4.2 ___6.3 ___8.1 __ 11.3 __ 14.1 __ 16.5 __ 16.2 __ 13.7 __10.4 ___6.9 ___5.1 __ 9.7

1981-2010________4.4 ___4.4 ___6.6 ___8.5 __ 11.7 __ 14.5 __ 16.7 __ 16.4 __ 14.0 __10.7 ___7.1 ___4.6 __10.0

 

1991-2020________4.6 ___4.8 ___6.7 ___8.9 __ 11.9 __ 14.7 __ 16.9 __ 16.5 __ 14.2 __11.0 ___7.4 ___5.0 __10.2

(the final set include data to July 2019 and will be adjusted through 2020 until complete .. most values here are unlikely to change more than 0.1 now). 

 

Edited July 23, 2019 by Roger J Smith

[Roger J Smith]

Significant record daily CET values

 

A "significant" record is defined as one that is either earliest or latest on record.  This is the list generated ... 

 

RECORD MAX

 

10.8 __ 1 Jan 1851 (not considered valid, only appears due to calendar)

11.6 __ 3 Jan 1932

(9.8 on 28 Jan 1944 is lowest of year)

12.2 __ 3 Feb 2004

12.8 __ 4 Feb 2004

13.4 __12 Mar 1957

14.1 __18 Mar 1990

14.6 __26 Mar 1777

14.8 __27 Mar 1777

15.1 __30 Mar 2017

15.6 __ 4 Apr 1946

16.0 __11 Apr 1869

16.1 __ 14 Apr 1869

16.3 __ 15 Apr 1945

17.0 __ 16 Apr 1945

17.6 __ 19 Apr 2018

19.7 __29 Apr 1775

20.0 __15 May 1833

20.4 __19 May 1868

21.0 __25 May 1953

21.2 __29 May 1780

22.3 __ 2 June 1947

23.0 __ 3 June 1947

24.6 __ 1 July 2015

24.7 __ 4 July 1976

25.2 __25 July 2019 and 29 July 1948

25.1 __ 12 Aug 2020

23.6 __13 Aug 1911

23.0 __28 Aug 1942

22.6 __ 2 Sep 1906

22.4 __ 5 Sep 1949

21.4 __21 Sep 2006

20.2 __ 1 Oct 1985

19.8 __ 3 Oct 2011

19.0 __ 6 Oct 1921

18.5 __13 Oct 2018

17.2 __14 Oct 2017

16.9 __ 31 Oct 2014

15.4 __ 5 Nov 1938

14.6 __13 Nov 1938

14.4 __22 Nov 1947

13.1 __19 Dec 2015 (replaced 12.9 from 12 Dec 1994)

12.0 __29 Dec 1987

11.1 __31 Dec 1859 (not valid, only appears due to calendar)

 

RECORD MIN

 

(as there was a reading of -10.8 in December, the values in early January must be colder than that to qualify)

-11.9 __ 20 Jan 1838

-8.9 __25 Jan 1795

-8.8 __ 9 Feb 1816

-8.0 __15 Feb 1929

-7.3 __16 Feb 1855

-7.1 __17 Feb 1855

-6.7 __24 Feb 1947

-6.5 __13 Mar 1845

-3.7 __14 Mar 1845

-3.0 __16 Mar 1845

-2.2 __17 Mar 1845

-1.6 __21 Mar 1899

-1.3 __25 Mar 1853

-0.8 __31 Mar 1799

-0.5 __ 3 Apr 1799

-0.2 __19 Apr 1772

 0.5 __24 Apr 1908

 0.7 __29 Apr 1856

 2.6 __30 Apr 1945

 2.9 __ 8 May 1861

 3.6 __17 May 1935

 4.1 __18 May 1872

 4.6 __26 May 1821

 4.9 __30 May 1807

 6.4 __31 May 1802

 7.3 __19 June 1795

 8.7 __20 July 1836

(11.9 on 1 Aug 1888 is the highest value of the year)

 8.8 __26 Aug 1864

 7.1 __ 1 Sep 1816

 6.7 __13 Sep 1807

 6.5 __21 Sep 1872

 6.3 __22 Sep 1872

 6.0 __23 Sep 1773

 4.9 __28 Sep 1824

 3.6 __ 2 Oct 1817

 3.5 __ 7 Oct 1829

 3.3 __ 9 Oct 1852

 3.2 __12 Oct 1887

 2.2 __13 Oct 1838

 1.8 __16 Oct 1843

 1.5 __19 Oct 1813

 1.2 __21 Oct 1842

 0.9 __23 Oct 1859

 0.6 __24 Oct 1859

 0.3 __29 Oct 1895

-0.6 __ 7 Nov 1791

-1.2 __ 8 Nov 1812

-1.4 __12 Nov 1919

-2.1 __15 Nov 1965

-2.9 __16 Nov 1901

-4.2 __23 Nov 1858

-4.6 __24 Nov 1904

-4.7 __ 2 Dec 1796

-5.5 __ 6 Dec 1844

-5.7 __ 7 Dec 1879

-6.7 __11 Dec 1784

-8.5 __12 Dec 1981

-10.8 __25 Dec 1796

Edited September 1, 2020 by Roger J Smith

[Roger J Smith]

Continuing to stock this newer thread with the material from the previous one, having moved over most if not all of the better temperature material, now starting into the

precipitation data files. 

 

Maximum daily precipitation (mm) 1931-2023 Central England (CEP)

DATE __ JAN _________ FEB _________ MAR _________ APR __________ MAY _________  JUN

01 _____ 9.0 (1958) __ 15.8 (1979) ___ 8.6 (1987) __ 15.7 (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) __ 13.1 (2021) __ 13.4 (2012)

04 _____ 9.3 (2001) __ 12.9 (2001) __ 19.0 (1942) ___ 9.5 (1987) __ 12.2 (2015) __ 15.8 (2022)

05 ____ 10.9 (1951) __ 12.2 (1935) __ 11.9 (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) __ 34.4 (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) __ 19.9 (2019)

13 ____ 15.7 (2021) __ 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) ___20.0 (2020)__ 23.8 (2008) __ 14.1 (2016) __ 12.0 (1958) __ 15.1 (1978)

16 _____ 8.9 (1955) ___ 8.5 (1951) __ 17.7 (2022) __ 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) __ 16.8 (2020)

18 ____ 15.0 (2003) __ 14.7 (1966) ___ 8.5 (1986) __ 16.0 (1975) __ 13.3 (1953) __ 17.8 (2021)

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 (1996) ___ 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) __ 13.4 (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) ___ 9.6 (2018.)__ 26.9 (2007) __ 25.1 (2017)

28 ____ 17.3 (1958) __ 11.6 (2020) __ 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 )) ___13.6 (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 (1872-2022) for

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

(unlike July to December, all six of these occurred after 1931 in the daily data period, 1872 to 1930 monthly data only)

2019 new records and what they replaced:

Mar 5 _ 11.9 mm replaced 11.3 (2003).

also _ 33.4 replaced 13.8 (1993) for 10 June

_ 19.9 replaced 16.2 (1954) for 12 June

and in 2020, 15 Feb 20.0 mm replaced 7.0 (1944) and is now tied as the highest February daily value with 20.0 on 24th 1958.

28 Feb, 11.6 mm edged out 11.5 mm from 1990. 

10.9 mm on 8 Jan, and 11.7 mm on 9 Feb were in the range of some daily records but failed to beat existing marks. 

16.8 mm on 17 June beat 10.2 mm (1966).

then in 2021 ...

15.7 mm on 13 Jan replaces 14.9 (1993)  

13.1 mm on 3 May replaces 11.4 (1973)

17.8 mm on 18 June replaces 15.8 (1971)

and in 2022 ...

17.7 mm on 16 Mar replaces 13.0 (1979)

15.8 mm on 4 June replaces 11.8 (1985)

also in 2023 ...

18.5 mm on 9 Mar did not quite equal 18.7 from 1981 but would be a daily record for most days in March

15.5 mm on 18 June also failed to replace 2021 record (see above) of 17.8 mm or its antecedent 15.8 (1971).

 

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 (1938,2020)_ 19.5 (1957) _27.4 (1960)

04 ____ 9.1 (2021) __ 15.9 (1963) __ 12.4 (1998) __ 21.2 (2008) __ 13.8 (1957) __ 10.9 (2020)

05 ___ 11.6 (2021) __ 20.2 (1939) __ 16.1 (2008) __ 13.5 (2019) __ 25.8 (2000) __ 15.0 (1985)

06 ___ 18.5 (1963) __ 35.3 (1951) __ 15.6 (2010) __ 23.6 (1985) __ 10.2 (2019) __ 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)a__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 ___ 12.0 (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) __ 14.7 (2018)+__17.1 (1946) __ 17.0 (1989)

15 ___ 29.6 (1937) __ 10.3 (1950) __ 24.6 (1968) __ 33.3 (2002) __ 11.7 (1975) __ 10.0 (1989.)

16 ___ 12.8^(1973) __ 19.3 (2022) __ 17.7 (1989) __ 29.3 (1967) __ 17.8 (1969) ___ 8.6 (1989)

17 ___ 30.7 (2001) __ 16.3 (1963) __ 18.7 (2023) __ 19.4 (1939) __ 14.9 (1960) ___ 8.4 (1994)

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

19 ___  10.5 (1939) __ 29.1 (1970) __ 17.6 (2000) __ 29.7 (2023)a__ 17.6 (1946) __ 16.2 (1996)

20 ___ 28.0 (2007) __ 13.5 (1932)$__31.6 (1946) __ 25.2 (2023)a__ 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 ___ 10.4 (2023) __ 24.5 (1941) __ 19.4 (2012) __ 18.7 (1949) __ 17.0 (1984) __ 20.9 (2020)

24 ___ 18.1 (2015) __ 15.4 (2020) __ 29.1 (1935) __ 13.0 (1998) __ 23.6 (2012) ___ 9.8 (2000)

25 ___ 13.2 (1931) __ 37.7 (1986) __ 18.5 (2000) __ 18.8 (2019) __ 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 ___ 17.8 (2019) __ 11.1 (2020) __ 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) __ 18.3 (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 ... a 08 Sep 1972 27.8 mm

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 2018, 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.

a _ 19.7 (1981) on 19 Oct and 16.0 (1987) on 20 Oct were replaced by very heavy rains of storm Babet in Oct 2023, 15.9 mm on 18 Oct 2023 was not quite a daily record. 3-day total rain of 70.8 mm 18-20 Oct. 

 

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 ... 15.2 mm on 14th August 2019 was not a new record. ... 30 Sep 2019 replaced 14.5 mm in 1952. A fall of 19.4 on the 28th did not break that day's record of 30.5 mm.

5 Oct (13.5, 2019) broke the existing record of 11.9 (1955). And 25 Oct (18.8, 2019) broke the existing record of 16.4 (1979). 

6 Nov 2019 (10.2 mm) broke the existing record of 9.9 (2000) but the following day 10.3 mm was not a record (14.7, 1935). 15.4 mm on 14th Nov 2019 was short of the daily record of 17.1 mm (1946). 

18.2 mm on 16 Aug 2020 broke the existing record of 11.1 mm (2019). It would be later broken by 19.3 mm in 2022. 

15.4 mm on 24 Aug 2020 broke the existing mark of 14.8 (1944). 

11.1 mm on 27 Aug 2020 broke the existing mark of 10.4 (2016). 11.3 mm on 28 Aug 2020 was not a record for that date though.

14.1 mm on 3 Oct 2020 tied the existing record from 1938. These posted values are sometimes amended later so this may go either way (by Dec 2022 still a tie).

20.9 mm on 23 Dec 2020 broke the existing record of 12.8 (2013). On Dec 3 13.9 mm was not close to breaking 27.4 mm (1960) but would have been a daily record on the 4th or 6th. ... 24.8 mm fell in total 3rd-4th. The 10.9 mm on 4th was a daily record replacing 10.3 mm (1937).

9.1 mm on 4 July 2021 broke the previous mark 9.0 (1974) and 11.6 mm on 5 July 2021 broke the existing record of 9.4 mm (2012). 

14.6 mm (28 Sep 2021) and 16.5 mm (4 Oct 2021) did not break daily records.

19.3 mm on 16 Aug 2022 broke the existing record of 18.2 mm (2020).

There were several wet days in October and November 2022 but none of them broke daily records. 12.6 (20 Oct), 14.2 (23 Oct, 16 Nov), 15.7 (21 Nov).

11.6 mm on 22 July 2023 was below record value but 11.4 mm next day 23 July 2023 broke record of 9.1 mm from 1969. 

15.1 mm on 26 July 2023 was also below record value of 19.1 mm (1941). _ see note below.

18.7 mm on 17 Sep 2023 broke a record of 12.2 mm (1983). _ to be checked as values often change slightly within 3-4 months.

10.8 mm on 11 Oct 2023 and 19.0 on 12 Oct 2023 both a little below existing records, to be checked for next few months until final values known.

 

Edited November 6, 2023 by Roger J Smith

[A Winter's Tale]

Longest Cold Spells: 14 days or more with mean 2.0C or lower

 

20 Jan-12 Mar 1947 - 52 

15 Jan-23 Feb 1855 - 40 

7 Dec 1890-13 Jan 1891 - 38

27 Dec 1813-1 Feb 1814 - 37

23 Dec 1962-27 Jan 1963 - 36

13 Jan-16 Feb 1917 - 35

24 Dec 1794-26 Jan 1795 - 34

29 Jan-3 Mar 1963 - 34

8 Jan-6 Feb 1830 - 30

24 Jan-22 Feb 1895 - 30

7 Dec 1784-4 Jan 1785 - 29

3 Feb-3 Mar 1986 - 29

7 Jan-2 Feb 1776 - 27

9 Jan-4 Feb 1940 - 27

24 Dec 1819-18 Jan 1820 - 26

2-25 Feb 1827 - 24

16 Jan-7 Feb 1772 - 23

23 Feb-17 Mar 1886 - 23

12 Feb-5 Mar 1888 - 23

29 Jan-20 Feb 1902 - 23

6-27 Dec 1878 - 22

25 Jan-15 Feb 1991 - 22

18 Jan-7 Feb 1780 - 21

26 Dec 1788-15 Jan 1789 - 21

13 Dec 1799-2 Jan 1800 - 21

5-25 Jan 1829 - 21

12 Dec 1874-1 Jan 1875 - 21

9-29 Jan 1880 - 21

7-27 Jan 1881 - 21

11 Feb-3 Mar 1955 - 21

8-28 Dec 1981 - 21

31 Jan-19 Feb 1782 - 20

16 Jan-4 Feb 1784 - 20

8-27 Jan 1823 - 20

16 Jan-4 Feb 1879 - 20

10-29 Jan 1933 - 20

27 Dec 1777-14 Jan 1778 - 19

19 Dec 1829-6 Jan 1830 - 19

15 Jan-2 Feb 1897 - 19

27 Jan-14 Feb 1919 - 19

5-23 Jan 1942 - 19

17 Dec 1961-4 Jan 1962 - 19

23 Dec 1996-10 Jan 1997 - 19

25 Dec 1776-11 Jan 1777 - 18

30 Dec 1801-16 Jan 1802 - 18

23 Dec 1892-9 Jan 1893 - 18

3-20 Jan 1985 - 18

23 Jan 1996-9 Feb 1996 - 18

26 Feb-14 Mar 1785 - 17

22 Feb 1786-10 Mar 1786 - 17

4-20 Mar 1814 - 17

5-21 Jan 1838 - 17

18 Feb-6 Mar 1858 - 17

14-30 Dec 1860 - 17

8-24 Feb 1983 - 17

29 Dec 1773-13 Jan 1774 - 16

17 Dec 1804-1 Jan 1805 - 16

26 Dec 1867-10 Jan 1868 - 16

21 Dec 1870-5 Jan 1871 - 16

28 Nov-13 Dec 1879 - 16

14 Feb-1 Mar 1942 - 16

6-21 Feb 1979 - 16

24 Nov-9 Dec 2010 - 16

6-20 Feb 1784 - 15 

1-15 Jan 1842 - 15

18 Jan-1 Feb 1871 - 15

30 Dec 1894-13 Jan 1895 - 15

1-15 Feb 1900 - 15

24 Jan-7 Feb 1954 - 15

17-31 Jan 1979 - 15

31 Jan-13 Feb 1773 - 14 

10-23 Dec 1788 - 14 

28 Jan-10 Feb 1879 - 14

21 Jan-3 Feb 1805 - 14

28 Dec 1810-10 Jan 1811 - 14

15-28 Jan 1815 - 14

10-23 Feb 1838 - 14

9-22 Jan 1847 - 14

5-18 Jan 1850 - 14

24 Dec 1853-6 Jan 1854 - 14

24 Jan-6 Feb 1873 - 14

21 Dec 1950-3 Jan 1951 - 14

4-17 Jan 1959 - 14

9-22 Jan 1966 - 14

8-21 Feb 1978 - 14

7-20 Jan 1987 - 14

1-14 Jan 2010 - 14

 

Earliest and and latest spells of consecutive days with mean below 2.0C.

 

16 Oct 1843 - 1 day

23-24 Oct 1859 - 2 days

26-29 Oct 1895 - 4 days

8-13 Nov 1921 - 6 days

17-24 Nov 1858 - 8 days

22-30 Nov 1923 - 9 days

24 Nov-9 Dec 2010 - 16 days

6-27 Dec 1878 - 22 days

7 Dec 1890-13 Jan 1891 - 38 days

15 Jan-23 Feb 1855 - 40 days

20 Jan-12 Mar 1947 - 52 days

23 Feb-17 Mar 1886 - 23 days

4-20 Mar 1814 - 17 days

23 Mar-1 Apr 2013 - 10 days

30 Mar-4 Apr 1879 - 6 days 

3-7 Apr 1839 - 5 days

14-16 Apr 1892 - 3 days

24-25 Apr 1908 - 2 days

29 Apr 1856 - 1 day

 

[Roger J Smith]

Thanks to AWT for adding the data above. I have been editing tables, and the winter of 2019-20 lowest daily CET value (1.5, 2nd Dec) appears to be third highest value in the series behind 2013-14 and 1974-75. There were new daily rainfall records on two occasions in February. (using the CEP rather than EWP for this)

Provisionally we have broken records for 8th and 10th of April. Will wait to see the final values before editing those values. The record for 9th (2017) appears to have survived. Will edit in the outcome for 11th. That record is considerably higher (16.0 in 1869).

Edited April 11, 2020 by Roger J Smith

[Roger J Smith]

Here's the latest file to be updated from the old thread ... lowest ten-day precip totals for the CEP ... 

 

Minimum Precipitation over previous ten days (1931-2023)

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, etc ... value posted for 1 Jan begins 23 Dec of previous year. 

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 ___0.4 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.0

_____ 1973 _ 2023 _1943_1974_1942,95,2011_1939_1979,93_1995_1991_1959_1978_1962

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

_____ 1973_ 2023_ 1943 _1974 _1942,95__1939,51 _1979,93_ 1995_ 1991 _ 1959_  1988_  1962

07 ____1.5 ___0.3 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.2 ___0.2

____ 1946 _2023_ 1943_ 1974_ 1942 _1939,51 _ 1993 _ 1995 _ 1991 _1945,59_1988 _ 1962

08 ____1.5 ___0.3 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.1

____ 1946 _ 2023 _ 1943 _1974 _ 1942_1939,51,62_ 1934_1995 _ 1991 _1945,59 _1978_1991

09 ____0.7 ___0.2 ___0.0 ___0.0 ___0.1 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.4 ___0.1

___ 1964 _ 2023 _ 1943 _ 1974 _1942 _1939,2013*_1934_1995 _ 1991 _1945,59_1978,81_1991

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

____ 1964 _ 2023 _ 1943 _ 1974 _ 1935 _ 2013 _ 1934 _ 1995 _ 1991 _ 1953 _ 1978 _ 1991

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

___ 1964 _ 2023_ 1943_ 1971 _1935,53_ 2013_ 1934_ 1995_ 1991 _ 1953 _ 1978 _ 1991

12 ____0.8 ___0.2 ___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 ___0.1 ___0.0 ___0.0 ___0.0 ___1.2 ___0.0

____ 1950 _ 1934 _ 1943 _1971,97_ 1980_1969_2022_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 ____0.6 ___0.1 ___0.2 ___0.0 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.0 ___0.6 ___0.5

____2022_1943_1953,2001_1951,76,2021_1978_1949,96_1990_1976_1966_1985_1973_1961

26 ____0.6 ___0.0 ___0.2 ___0.0 ___0.0 ___0.0 ___0.0 ___0.1 ___0.1 ___0.0 ___0.6 ___0.8

____ 2022 _1943_ 2022 _1951,76,2021_1977,78.90_1949_1990_1947,76_1966_1985 _1973_1961

27 ____0.4 ___0.0 ___0.2 ___0.1 ___0.0 ___0.0 ___ 0.2___ 0.1___ 0.0___0.0 ___0.6 ___0.8

____ 1933 _1943_2022_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_ 1984,2022 _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

____________________________________________

2020 dry most of May, failed to catch any of the indicated record values except for 14-23 May,

... replaces 0.6 mm from 2010 with 0.5 mm. 

2020 was unable to join other years (1960,77,97) at 0.0 for 2 June in this table as 0.7 mm fell on 2 June after nine dry days 24 May-1 June).

Jan 2022 ran close to the record low totals 10th-19th to 20th-29th above. Using the rounded off daily totals that have generated these records in the past, the results are generally similar to the two-digit totals added up, and both the 16th-25th and 17th-26th broke the records of 1.4 mm from 1987 and 0.7 mm from 1932 with 0.6 for each (also added to 0.62, 0.60 in two digits). The lowest total was 0.2 (0.30 from two digit values) 20th-29th but there the record was lower (0.1 1991). 

Mar 17-26 and 18-27 2022 broke records of 0.5 from 2003. In two digits, totals were 0.25 and 0.23 mm. Total for 19-28 was 0.19 mm but record was 0.1 mm for interval (2019), actual total in two digits was 0.09 mm in 2019. 

Apr 2022 dry ten day interval 20-29 was 0.0 using rounded data and 0.04 (25 Apr only) in two decimals. 1984 was 0.00. 

July 2022 dry ten day interval 4-13 (0.1) broke 2013 (0.3), 0.5 mm was total for each interval 5-14 to 10-19 but not quite records, but later extreme heat probably negated any effect of 0.4 mm on 14 July preventing further records. 

Aug 2022 9-day dry interval 6-14 but 0.2 on 5 Aug and 0.4 on 15 Aug prevented any tied records in a period with 0.0 record lows.

Feb 2023 dry intervals ending 5 Feb broke records of 0.7 (27 Jan-5 Feb 1959 & 2007), 0.2 (28 Jan-6 Feb 2006), 0.5 (29, 30, 31 Jan and 1, 2, 3 Feb to 7, 8, 9, 10, 11, 12 Feb 1959).

*2023 may 20-29 also 0.0 rounded but 0.05 in two decimals. After 0.6 mm 30 may, 31 may to 9 June also dry (0.02). 

 

 

Edited October 17, 2023 by Roger J Smith

[Roger J Smith]

Dry months and longest dry spells (CEP)

 

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

___ (2020 has just replaced May 1991 in this table) ___

 

Dry spells longer than ten days

--- all ending at ten days will appear in the previous post (record dry spells of ten days) 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. The first listing is absolute drought, the second when available is a longer interval that has no days above 0.1 mm. About half the cases had no extension of the original dry spell noted. Two entries in Aug-Sep 1947 highlighted in red combine for one very long associated spell with no days above 0.1 mm.

(note -- before 2000 dry days tended to be entered as either 0.00 or 0.10 in the CEP daily data, after 2000, various small values that round to 0.0 or 0.1 appeared. My practice was to take the rounded values. So while many of these dry spells have a consecutive string of 0.00 entries for the days shown, some of the more recent have a few values that if added together would yield a total greater than 0.05 mm. ... the change in procedure also affects the range of permissible values for the associated longer spells which can include days as high as 0.14 mm).

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

2018 ____ 23 _______ 18 Jun - 10 Jul _____ 26 days __ 17 Jun - 12 Jul _ 0.1 on 17 Jun, 11 Jul

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 extension)

1949 ____ 18 _______ 16 Jun -- 03 Jul _____ 19 days __ 16 Jun -- 03 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

 

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

 

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*)

1978 ____ 15 _______ 16-30 May _________15 days __ 16-30 May (no extensions)

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

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

 

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 extension)

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

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

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)

 

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

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

 

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 ____ 32 days see earlier entry, extended with 0.1 5th-6th Sep

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

 

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

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)

 

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

2007 ____ 12 _______ 04-15 Sep _________ 12 days __ (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)

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

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

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

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

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

 

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

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

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

1989 ____ 11 _______ 10-20 June _________ 11 days __ 10-20 June __ (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)

1995 ____ 11 _______ 26 Apr -- 06 May _____11 days __ 26 Apr -- 06 May __ (no extension)

2021 ____ 11 _______ 16 Apr - 26 Apr _____11 days ___ 16 Apr - 26 Apr __ (no extension)

________________________________________________________________________

Notes: of the 56 spells listed above (55 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)

2011-20 __ xx (2) plus one in 2021

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.

Late May and early June 2020 may not appear here if the longest absolute dry spell is ten days but it can be noted that there were no days above 0.1 mm from 22 May to 2 June (12 days), there are probably quite a few other "associated dry spell" cases over 10 days that don't appear in the table because there was no absolute dry spell of 11 days or longer. Another one noted was 10-23 Mar 2016 which had several days at 0.1 mm and also 19-31 Mar 2019.

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 _17 ______ OCT _ 9

MAR _ 2 _______ JUL _13 ______ NOV _ 1

APR _10 _______ AUG _ 9 ______ DEC _ 1

__________________________________________________________________

Except for the June-July 2018 dry spell and possibly 24 May - 2 Jun 2020, the longest interval of absolute drought (no days above 0.0 after rounding) that occurred after the originally posted table to end 2015 was nine days (26 Jun - 4 Jul 2019) with one spell of eight days (16-23 May 2018) four with seven days (31 Jul - 6 Aug 2018, 21-27 Mar 2020, 19-25 Apr 2020 and 14-20 May 2020) and six days in three spells (5-10 Apr 2017, 13-18 Jun 2017, 24-29 Sep 2018).

Edited May 11, 2021 by Roger J Smith

[Roger J Smith]

Least extreme values for each month (daily CET)

(1772 to 2020 excl Nov-Dec)

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

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

(some further explanation, the values on the left are the lowest instances of maximum

monthly daily means, and the values on the right are the highest instances of minimum

monthly daily means ... relevant because Nov 2020 currently tied 2nd in the "highest min"

at 6.0, will edit in how that fares at end of the month. 

____________ (no day warmer than values) _____ (no day colder than values)

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) 

:  Feb 2014 tied 2020 were ranked third for highest min at 3.8 until 2022 edged past them at 3.9. 

^ March 2013 ranked third for lowest maximum at 6.8

^ also March 2019 ranked third for highest minimum at 5.4. 

 

Edited March 8, 2022 by Roger J Smith

[Roger J Smith]

Note that the first post in this thread has been updated to give 1772-2020 daily averages to two decimal precision (it was reading 1772-2018 until I updated it). 

Also the daily precip records (using CEP rather than EWP) have been fully updated for 2020 now. 

A few more of the old files posted in the original 1772-2011 version (now well back in the topic list) will come over here eventually, preserving anything of independent value from these posts. 

I will post brief summary posts every so often to bump this thread to page one (again) but know this, the files are always being checked for necessary edits and just because there's no new post does not mean there's no new entries (daily records the most likely to be edited). 

[Roger J Smith]

Tables for the warmest and coldest weeks ending on each day of the year are being maintained in an older version of this thread at this link:

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

These will be brought forward into this thread at some point. 

I just checked Feb 2021 data and found that weeks ending 21 to 25 Feb were in consideration, some finished as high as second warmest. Data from 2019 and 1990 sometimes edged out 2021 in this regard. The second half of Feb 2021 (15th-28th) averaged 8.16 C which made it the fourth warmest second half in the daily data era (1772-present), beaten by only 2019 (8.81), 1926 (8.39) and 1846 (8.34). 

[Roger J Smith]

Continuing to stock this thread with material from the older version which is now back around page nine of the index. 

 

Missing CET values closest to the median

 

MONTH ___ Missing values below average_ 1659-2020 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) _ 12.1 set in 2021.

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 Dec 5.9 is the most anomalous, especially if we take recent normals as the standard. 

If that one goes, then second most impressive on the warm side is probably 16.3 for June which has some chance of going this year (2021). 8.3 was set for the first time in Nov 2018. 12.1 was removed for OCT in 2021 but 12.2 remains. It would be 16th warmest while a 16.3 June would be 15th warmest if either happened before any intervening warmer values.

The most impressive missing cold value is perhaps 1.3 in February or 2.6 in March. A lot of the cold values closest to the median would be at about the same rank though. 

The most unlikely outcome in statistical terms was the lone 3.1 for January (1832) which was finally joined by 2021. 

Edited November 2, 2021 by Roger J Smith

[Roger J Smith]

From here to end of this thread, tables of record highs and lows are the dominant feature. A full analysis of the (mostly small) differences created in these records from the new v2.0 series can be found here:

https://www.community.netweather.tv/topic/97122-updated-cet-data-base-v20-posted-9-may-2022-an-ongoing-analysis-of-changes-made-to-what-they-now-call-the-legacy-data-base/page/2/

With that being understood, the rest of this thread relies only on the legacy CET values and will not be further updated, complete updates after 1 May 2022 will appear in the linked thread only. For casual readers I will make notes of new records in the v2.0 in the daily records that follow. 

 

Highest maxima and lowest minima for each day (CET 1878-present)

We have already tracked the extremes of mean daily CET values (page one) covering the period 1772-present. These posts will track the highest daily maxima and the lowest daily minima for each day of the year, with four posts planned (three months appearing in each). The daily extremes only date back to 1878 so in some cases the daily averages for 1772 to 1877 might provide clues about more extreme values from that era. One or two of the more obvious ones will be noted. These tables include both the extreme value 1878 to present and the extreme value from 1981 to present (if that is the same, then instead the "recent" entry switches to being the earlier portion and the entry is in brackets and also is underlined, to highlight that difference. Occasionally there is a tied value with one year recent and the other "previous" to 1981 (e.g., 5 Jan tied 1957, 1983). Indirectly, this system helps us to count easily how many records are recent. If a recent value is the record, the previous value (still a record by 1980) may have been broken by more than just the listed recent record. Any cases where post-1980 records break another such case, are identified by notes below the monthly tables. Cases where other recent years break the noted previous, but not the already existing new record, are also listed.

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

01 Jan __ 14.3 _ 2022*______(13.0 _ 1916)* __________ ___ -8.6 _ 1962 ______ -6.5 _ 2002

02 Jan __ 12.9 _ 1910,76 ___ 11.8 _ 1982 ____________ ___ -8.7 _ 1962 ______ -6.2 _ 2002

03 Jan __ 12.7 _ 1932,48 ___ 12.2 _ 1999^ ___________ ___ -7.8 _ 1962 ______ -6.1 _ 1993

04 Jan __ 13.2 _ 1916 ______ 12.4 _ 1983,99 _________ ___ -7.2 _ 1893 ______ -6.9 _ 2010

05 Jan __ 13.3 _ 1957,83 ___ (tied) * _________________ ___ -8.6 _ 1893 ______ -6.2 _ 2010

06 Jan __ 12.7 _ 1916,28 ___ 12.2 _ 2005^ ___________ __-10.7 _ 1894 ______ -6.8 _ 2009

07 Jan __ 12.9 _ 2005 ______(11.8 _ 1890)* __________ ___ -9.7 _ 1894 ______ -8.5 _ 2010

08 Jan __ 12.8 _ 2007 ______(11.8 _ 1888, 1971)* ___ ___ -7.7 _ 1970, 2010 __ (tied) 

09 Jan __ 14.0 _ 2015 ______(13.4 _ 1914)* __________ ___ -6.5 _ 1918 ______ -5.4 _ 1985

10 Jan __ 12.7 _ 1971 ______ 12.3 _ 1998 ____________ ___ -8.0 _ 1968, 82 __ (tied)

11 Jan __ 12.3 _ 2007 ______(12.0 _ 1950)* __________ ___ -8.2 _ 1879 ______ -7.8 _ 1982

12 Jan __ 13.1 _ 2007 ______(11.6 _ 1948)* __________ __ -10.1 _ 1963 ______ -9.7 _ 1987*

13 Jan __ 12.3 _ 2011*______(12.1 _ 1948)*__________ ___ -9.6 _ 1987 ______(-8.6 _ 1979)*

14 Jan __ 12.7 _ 1968 ______ 12.2 _ 2020 ____________ __ -12.9 _ 1982 ______(-9.7 _ 1881) 

15 Jan __ 13.1 _ 1954 ______ 12.6 _ 1990 ____________ __ -12.7 _ 1982 _____ (-11.6 _ 1881)

16 Jan __ 13.1 _ 1993 ______(12.6 _ 1947) ____________ __-12.7 _ 1881 ______ -6.5 _ 1982

17 Jan __ 12.4 _ 1934 ______ 12.1 _ 2007 ____________ __ -11.0 _ 1881 ______ -8.8 _ 1985

18 Jan __ 13.2 _ 2008 ______(12.4 _ 1932) ____________ __ -11.0 _ 1891 ______ -8.7 _ 1985

19 Jan __ 13.6 _ 1930 ______ 13.3 _ 2007 _____________ __ -11.1 _ 1891 ______ -3.2 _ 2001

20 Jan __ 12.9 _ 2008 ______(12.3 _ 1898)* ___________ __ -11.5 _ 1881 ______ -4.0 _ 2001

21 Jan __ 12.4 _ 1993^______(12.3 _ 1916) _____________ __-13.4 _ 1940* _____ -3.4 _ 2011*

22 Jan __ 12.5 _ 1878 ______ 11.3 _ 2016 ______________ __-12.3 _ 1881* _____ -5.1 _ 1992^

23 Jan __ 13.0 _ 1884^______ 12.5 _ 2018 ______________ __-13.2 _ 1963 ______ -5.6 _ 1992

24 Jan __ 13.7 _ 2016 ______(12.5 _ 1918) _____________ __ -12.7 _ 1963 ______ -4.2 _ 1992

25 Jan __ 13.5 _ 2016 ______(11.7 _ 1977) _____________ __ -10.7 _ 1963 ______ -4.2 _ 2021

26 Jan __ 13.2 _ 2003 ______(11.5 _ 1944)* ____________ __ -10.6 _ 1945 ______ -5.6 _ 1986

27 Jan __ 13.4 _ 2002 ______(13.0 _ 1958)* ____________ __ -10.3 _ 1945 ______ -4.7 _ 1985*

28 Jan __ 12.6 _ 2018 ______(11.8 _ 1921) ______________ __-11.1 _ 1979 ______ -4.5 _ 1996

29 Jan __ 13.0 _ 2002 ______(12.3 _ 1961)* _____________ ___-8.9 _ 1947 ______ -4.3 _ 2011*

30 Jan __ 12.7 _ 1975 ______ 11.9 _ 2000 ______________ ___ -8.7 _ 1947 ______ -4.9 _ 1987

31 Jan __ 12.6 _ 2016 ______(11.9 _ 1923)* ____________ ___ -9.2 _ 1972 ______ -7.1 _ 1987

___________________________

^ 3 Jan 2023 and 6 Jan 2023 in v2.0 12.4. The 1999 (3rd) and 2005 (6th) values remain same in v2.0. 

^ 21 Jan 2024 record high 12.5 in v2.0. 1993 value is still 12.4 in v2.0.

^ 22 Jan recent min (-5.1) tied in v2.0 2023. The v2.0 low for 1992 was however -5.2.

^ 23 Jan 2024 record high 13.0 in v2.0. This ties the 1884 CET legacy value but that was reduced to 12.3 in v2.0.

* 1st _ 2022 replaced record 13.1 from 2015; 12.7 in 1988, not a record

* 5th _ 12.9 in 1999, not a record

* 7th _ 12.8 in 2020, not a record

* 8th _ 12.4 in 1998, record to 2007

* 9th _ 13.7 in 1998, record to 2015, 13.1 in 2005, not a record ... also 13.3 (1921) and 13.2 (1936)

*11th _ 12.1 in 2005, record to 2007 _________________________________ *12th _ -9.5 also in 1879

*12th _ 12.2 in 1984, record to 2007

*13th _ 12.1 in 1989 tied 1948, tied records broken by 2011 _______ *13th _ -9.4 in 1982, record to 1987

*20th _ 12.7 in 2002, record to 2008 __________________________________*21st _ -12.9 in 1881, record to 1940

*26th _ 11.9 in 1983, record to 2003, 12.3 in 2016 not a record _____*22nd _ -11.7 also in 1940

*27th _ 12.8 in 2003, not a record, 12.6 in 2016 not a record ________*27th _ -9.8 also in 1910

*29th _ 12.2 in 2000, not a record, 12.8 in 2013 not a record ________ *29th _ -8.5 also in 1945, and -7.8 in 1912.

*31st _ 11.9 tied in 1983 before broken 1995 (12.2), then 2016 (12.6).

_______________________________________________________________________ likely colder nights in 1776 (26-31 Jan) and some parts of 1740, 1795, 1814.

_______________________________________________________________________ also around 20th-21st of 1838 where daily mean close to the min values.

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

 

01 Feb __ 13.3 _ 2016*______(13.2 _ 1898)*____________ ___ -9.7 _ 1956 ______ -6.7 _ 1987

02 Feb __ 13.5 _ 2004 ______(12.4 _ 1914,48) _________ __ -10.0 _ 1956 ______ -4.2 _ 2012

03 Feb __ 14.2 _ 2004 ______(12.9 _ 1914) ____________ __ -10.4 _ 1956 ______ -6.5 _ 2012*

04 Feb __ 14.5 _ 2004 ______(12.0 _ 1933)*____________ ___-9.7 _ 1956 ______ -7.2 _ 2012

05 Feb __ 13.1 _ 1990 ______(12.8 _ 1966)*____________ ___-9.2 _ 1917 ______ -4.1 _ 2012

06 Feb __ 13.4 _ 1989 ______(12.0 _ 1910)*____________ __ -11.0 1917  ______ -4.0 _ 2003, 07*

07 Feb __ 12.9 _ 1990 ______(12.4 _ 1894) _____________ __ -11.7 1917 _______ -7.1 _ 1991*

08 Feb __ 12.6 _ 1903, 2000 __ (tied)___________________ ___-13.5 _ 1895 ______ -5.9 _ 1991

09 Feb __ 14.1 _ 2008 ______(13.6 _ 1899)* ___________ __ -12.9 _ 1895 ______ -6.1 _ 1991

10 Feb __ 14.6 _ 1899 ______ 12.5 _ 2008 _____________ __ -11.3 _ 1895 ______ -8.7 _ 1986

11 Feb __ 13.7 _ 1939 ______ 13.3 _ 1998 _____________ ___ -8.6 _ 1986 ______ (-6.7 _ 1978)*

12 Feb __ 14.3 _ 1998 ______(12.4 _ 1896)*____________ __ -10.1 _ 1895 ______ -7.5 _ 1985

13 Feb __ 16.4 _ 1998 ______(13.1 _ 1910) _____________ __ -11.1 _ 1895 ______ -7.3 _ 1985

14 Feb __ 15.8 _ 1998 ______(13.7 _ 1961) _____________ __ -12.5 _ 1929 ______ -7.2 _ 1991

15 Feb __ 14.2 _ 1998,2019 __(13.2 _ 1926) _____________ __ -12.1 _ 1929 ______ -5.1 _ 1985

16 Feb __ 14.8 _ 2022*______(12.2 _ 1950)*_____________ ___ -7.2 _ 1969, 1985 _ (tied)

17 Feb __ 14.2*_ 1878,1920 __13.2 _ 2019 ______________ ___ -9.2 _ 1929 ______ -5.2 _ 2008

18 Feb __ 15.0 _ 1945 ______ 12.4 _ 1989 ______________ ___ -9.8 _ 1929 ______ -5.5 _ 1985

19 Feb __ 13.5 _ 1961 ______ 12.6 _ 1990 ______________ ___ -8.7 _ 1892 ______ -7.2 _ 1985

20 Feb __ 14.1 _ 2017 ______(13.2 _ 1903)*_____________ ___ -7.5 _ 1955 ______ -5.8 _ 1986

21 Feb __ 15.0 _ 2019 ______(12.6 _ 1878)*_____________ ___ -8.2 _ 1986 ______(-5.4 _ 1955)

22 Feb __ 15.0 _ 2019 ______(13.0 _ 1912)*_____________ ___ -6.3 _ 1986 ______(-6.0 _ 1942)

23 Feb __ 16.2 _ 2019 ______(13.3 _ 1922)*_____________ ___ -7.0 _ 1947 ______ -4.8 _ 1986

24 Feb __ 15.9 _ 2019 ______(14.1 _ 1921)*_____________ __ -13.6 _ 1947 ______ -5.2 _ 1986

25 Feb __ 17.7 _ 2019 ______(14.1 _ 1922) _____________ __ -12.1 _ 1947 ______ -3.9 _ 1986*

26 Feb __ 18.4 _ 2019 ______(13.3 _ 1945) _____________ ___ -8.0 _ 1947 ______ -4.9 _ 1986

27 Feb __ 16.3 _ 2019 ______(15.4 _ 1959) _____________ ___ -6.0 _ 1955 ______ -5.0 _ 1986

28 Feb __ 16.0 _ 1959 ______ 12.6 _ 1987 _____________ ___ -7.8 _ 1955 ______ -5.9 _ 2018

29 Feb __ 15.5 _ 1960*______11.8 _ 2012 _____________ ___ -4.9 _ 1904 ______ -2.3 _ 2004

* 1st _ 13.0 in 1923 not a record.

* 4th _ 12.3 in 1999 record to 2004 _________________________________ * 3rd _ also -9.0 in 1910

* 5th _ 13.0 in 2004 not a record ____________________________________ * 6th _ also -10.0 in 1895

* 6th _ 12.1 in 1981 record to 1989 __________________________________ * 7th _ also -11.6 in 1895, -6.8 in 2007 not a record

* 9th _ 13.4 in 1982 not a record.

*12th _ 13.6 in 2008 not a record ___________________________________ *11th _ -6.4 in 1985 and -7.1 2012 not records

*17th _ 14.2 in 2023 (v2.0) tied these values, however in v2.0 they

... are now 14.9 (1878) and 13.6 (1920) so 1878 retains the record.

*16th _ 12.4 in 2019 record to 2022

*20th _ 13.4 in 1998 record to 2017, 13.3 in 2021 not a record.

*21st _ 13.2 in 2016 record to 2019

*22nd _ 13.9 in 1990 record to 2019

*23rd _ 15.9 in 1990 record to 2019, 15.2 in 2012 not a record

*24th _ 14.4 in 2021 not a record. __________________________________ *25th _ also -8.8 in 1963

*29th _ 12.6 in 1912, 1948 records to 1960. Also 12.9 in 1976, not a record.

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

 

01 Mar __ 14.9 _ 1959 ______ 13.1 _ 2012 _____________ ___ -7.1 _ 1929 ______ -6.4 _ 2018

02 Mar __ 16.5 _ 1977 ______ 12.7 _ 2019 _____________ ___ -6.7 _ 1965 ______ -5.6 _ 2004

03 Mar __ 14.3 _ 1957 ______ 13.3 _ 1998 _____________ ___ -9.3 _ 1965 ______ -6.4 _ 1986*

04 Mar __ 16.0 _ 1928 ______ 13.0 _ 2003 _____________ ___ -7.2 _ 1890, 1909 __-6.1 _ 2006

05 Mar __ 16.0 _ 1961 ______ 13.8 _ 1989, 2013 ________ ___ -9.4 _ 1909 ______ -5.0 _ 2001

06 Mar __ 15.3 _ 1961*______ 14.6 _ 1989*_____________ ___-6.2 _ 1962 ______ -1.9 _ 2005

07 Mar __ 14.9 _ 1906*______ 14.7 _ 2015*____________ ___ -9.3 _ 1947 ______ -4.9 _ 2010*

08 Mar __ 15.1 _ 1961*______ 14.4 _ 2000*____________ ___ -6.6 _ 1947 ______ -5.3 _ 2010*

09 Mar __ 19.9 _ 1948*______16.9 _ 2014*____________ ___ -7.5 _ 1917 ______ -1.6 _ 1987

10 Mar __ 17.4 _ 1929 ______ 14.4 _ 2012 _____________ ___ -6.3 _ 1883 ______ -2.1 _ 1987

11 Mar __ 18.4 _ 1957 ______ 16.6 _ 1997 _____________ ___ -5.0 _ 1958 ______ -2.7 _ 1987

12 Mar __ 18.4 _ 1957 ______ 13.5 _ 1997 _____________ ___ -6.4 _ 1891 ______ -4.0 _ 2013

13 Mar __ 17.2 _ 1991 ______(17.1 _ 1957)*____________ ___ -6.3 _ 1887 ______ -3.2 _ 1987

14 Mar __ 17.9 _ 1948 ______ 14.4 _ 1993, 2017_________ ___ -6.7 _ 1887 ______ -4.2 _ 2013 

15 Mar __ 17.9 _ 1961 ______ 17.2 _ 1993 _____________ ___ -5.4 _ 1962 ______ -0.8 _ 1996

16 Mar __ 20.0 _ 1961 ______ 16.5 _ 2004 _____________ ___ -4.6 _ 1909^______ -1.2 _ 1985

17 Mar __ 19.3 _ 1990 ______(18.1 _ 1884) _____________ ___-5.1 _ 1887 ______ -2.5 _ 1985

18 Mar __ 19.6 _ 1990 ______(16.4 _ 1972) _____________ ___-4.6 _ 1900 ______ -3.4 _ 1985

19 Mar __ 17.6 _ 1972 ______ 16.2 _ 2005 _____________ ___ -4.5 _ 1887 ______ -2.8 _ 1985

20 Mar __ 17.5 _ 1929 ______ 13.9 _ 1992, 2012_________ ___ -7.7 _ 1930 ______ -4.3 _ 1985

21 Mar __ 17.8 _ 1927 ______ 14.5 _ 2002 _____________ ___ -6.0 _ 1899 ______ -2.2 _ 2007

22 Mar __ 18.0 _ 2022*_______(16.3 _ 1918)____________ ___ -5.3 _ 1899 ______ -1.5 _ 2006

23 Mar __ 19.4 _ 1945 ______ 18.5 _ 2022*_____________ ___ -4.8 _ 1899 ______ -3.4 _ 2006

24 Mar __ 18.9 _ 2012 ______(18.3 _ 1945)_____________ ___ -6.3 _ 1883 ______ -2.4 _ 2014

25 Mar __ 19.1^_ 1953 ______ 17.6 _ 2022* ____________ ___ -4.4 _ 1883 ______ -1.2 _ 2015

26 Mar __ 18.8^_ 2012 ______(18.2 _ 1948)____________ ___ -4.2 _ 1901 ______ -2.7 _ 1993

27 Mar __ 19.5^_ 2012 ______(18.8 _ 1923)* __________ ___ -4.4 _ 1881 ______ -1.9 _ 1993

28 Mar __ 20.3 _ 1929 ______ 19.8 _ 2012 ____________ ___ -3.9 _ 1901 ______ -1.8 _ 2013

29 Mar __ 22.1 _ 1965 ______ 17.0 _ 2012 ____________ ___ -4.9 _ 1901 ______ -2.8 _ 2013

30 Mar __ 21.2 _ 2021______(19.0 _ 1929)*____________ ___ -3.7 _ 1915 ______ -2.8 _ 2013

31 Mar __ 20.2 _ 2021 ______(18.7 _ 1907) ____________ ___ -3.8 _ 1955, 2013 __ (tied)

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

* 6th _ 15.2 in 1906 (record broken in 1961) ____________________* 3rd _ -7.5 in 1947, not a record

* 7th _ 14.6 in 2001, not a record ________________________________ * 7th _ -7.9 in 1886, not a record

* 8th _ 14.5 in 1938 (not a record).

* 9th _ 17.5 in 1929 (record broken in 1948)

*13th _ 16.8 in 1993, not a record.

*22nd _ 18.0 in 2022 broke post-1981 record of 15.7 in 2012 as well as previous all-time record 16.3 from 1918. 

*23rd _ 18.5 in 2022 replaces 17.5 (2003) as warmest since 1981. 

*25th _ 17.6 in 2022 replaces 16.8 (2012) as warmest since 1981.

*27th _ 17.3 in 1929, 17.2 in 1989, not records.

*30th _ 19.2 in 2017, record to 2021, also 17.6 in 2014, not a record.

*31st _ 17.6 in 2004, not a record.

^ note: 25th to 27th had high daily means (>14 C) in 1777 and may have had warmer days than these record values. 

also a cold spell in mid-month 1845 likely had lower minimum values. 

 

Edited January 24 by Roger J Smith