London Weather Records

London, Ontario weather averages and records from 1883–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in London, Ontario was 41.1 °C which occurred on August 6, 1918.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in London, Ontario was -32.8 °C which occurred on February 9, 1934.
Lowest Temperatures: All-Time By Year
London Weather by Month
Averages based on the years 1991–2020
Month Average (°C) Record (°C) Average (cm)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧
January -1.6 -9.1 16.7 -32.2 7.8
February -0.6 -9.0 17.8 -32.8 6.2
March 4.6 -4.4 27.2 -28.3 6.7
April 12.2 1.4 30.6 -17.8 8.7
May 19.3 7.6 34.4 -5.0 8.9
June 24.4 13.2 38.2 -1.1 8.7
July 26.6 15.3 38.9 2.2 8.0
August 25.7 14.4 41.1 1.1 7.1
September 22.0 10.5 35.6 -3.3 8.8
October 14.7 5.0 30.3 -11.1 8.3
November 7.5 -0.3 24.4 -22.2 8.3
December 1.3 -5.2 18.5 -30.0 7.5
Entire year 13.1 3.4 41.1 -32.8 94.7
More London Weather Records
1883–2024
Highest daily low 25.6 °C August 1, 2006
Lowest daily high -23.3 °C February 8, 1934
Greatest daily range
(Difference of high and low)		 28.3 °C December 22, 1958
Greatest difference in daily high
over two conscutive days		 23.3 °C Jan 20–21, 1907
Most daily precipitation 13.0 cm May 17, 1894
Most monthly precipitation 31.4 cm September 1996
Most yearly precipitation 130.3 cm 1990
Most yearly days with precipitation 197 2004
Earliest freeze September 10 1883
Earliest day ≥ 25 °C March 21 2012
Earliest day ≥ 30 °C April 23 1925
Earliest day ≥ 35 °C June 2 1919
Latest freeze June 11 1972
Latest day ≥ 25 °C October 26 1963
Latest day ≥ 30 °C October 8 2007
Latest day ≥ 35 °C September 12 1931
Most days in a year < 0 °C 170 1978
Most days in a year ≥ 20 °C 160 1921
Most days in a year ≥ 25 °C 111 1908
Most days in a year ≥ 30 °C 46 1921
Most days in a year ≥ 35 °C 9 1916
Most days in a year ≥ 40 °C 1 1918
London Weather Streaks
Most consecutive days...
With precipitation 23 days Jan 19 – Feb 10, 1947
Without precipitation 34 days Oct 8 – Nov 10, 1924
Freezing temperatures
High temperature ≤ 0 °C
 51 days Dec 21, 1976 – Feb 9, 1977
High temperature ≥ 20 °C 106 days Jun 6 – Sep 19, 1921
High temperature ≥ 25 °C 42 days Jun 27 – Aug 7, 1955
High temperature ≥ 30 °C 12 days Jul 17–28, 1964
High temperature ≥ 35 °C 7 days Jul 8–14, 1936
Plant Hardiness Zone
6A
London is in plant hardiness zone 6A
based on average yearly minimum temperature from 1991–2020
London Weather by Year
2024 2023 2022 2021 2020 2019 2018 2017 2016 2015
2014 2013 2012 2011 2010 2009 2008 2007 2006 2005
2004 2003 2002 2001 2000 1999 1998 1997 1996 1995
1994 1993 1992 1991 1990 1989 1988 1987 1986 1985
1984 1983 1982 1981 1980 1979 1978 1977 1976 1975
1974 1973 1972 1971 1970 1969 1968 1967 1966 1965
1964 1963 1962 1961 1960 1959 1958 1957 1956 1955
1954 1953 1952 1951 1950 1949 1948 1947 1946 1945
1944 1943 1942 1941 1940 1939 1938 1937 1936 1935
1934 1933 1932 1931 1930 1929 1928 1927 1926 1925
1924 1923 1922 1921 1920 1919 1918 1917 1916 1915
1914 1913 1912 1911 1910 1909 1908 1907 1906 1905
1904 1903 1902 1901 1900 1899 1898 1897 1896 1895
1894 1893 1892 1891 1890 1889 1888 1887 1886 1885
1884 1883
More London Weather
Average Weather by Day
Record High by Day
Record Low by Day
Average Temperature by Year
Average Temperature by Month
Average Rainfall By Month
Recent Weather Records
Compare London to:
Weather Station Details
Years Station Coordinates
2002–2024 London CS location
1941–2002 London International Airport location
1932–1940 London Lambeth A location
1883–1931 London South location
© H Brothers Inc, 2021–2024
Contact us | Privacy policy