Number of Days of 30 °C in London by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 30 degrees Celsius in London, Ontario, between 1883 and 2024.

Also see:

Which year had the most 30° days?

Based on NOAA records, the year 1921 holds the record for the most 30 °C days in London history. There were 46 days with a high temperature of at least 30 degrees that year.

How many so far this year (2024)?

It has not reached 30 degrees Celsius in London so far in 2024. As of April 27, the highest temperature this year is 73 °F.

The last time it reached at least 30° C was September 5, 2023.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days >= 30 °C
2024	141	0
2023	107	6
2022	90	9
2021	90	9
2020	45	20
2019	101	7
2018	49	18
2017	86	10
2016	40	21
2015	96	8
2014	133	2
2013	96	8
2012	24	27
2011	60	15
2010	60	15
2009	123	4
2008	107	6
2007	40	21
2006	83	11
2005	24	27
2004	137	1
2003	107	6
2002	24	27
2001	49	18
2000	133	2
1999	40	21
1998	76	12
1997	123	4
1996	133	2
1995	74	13
1994	101	7
1993	107	6
1992	141	0
1991	54	16
1990	137	1
1989	101	7
1988	12	30
1987	36	24
1986	116	5
1985	128	3
1984	128	3
1983	76	12
1982	128	3
1981	107	6
1980	116	5
1979	128	3
1978	86	10
1977	90	9
1976	107	6
1975	86	10
1974	90	9
1973	52	17
1972	116	5
1971	54	16
1970	83	11
1969	46	19
1968	74	13
1967	128	3
1966	65	14
1965	96	8
1964	28	26
1963	46	19
1962	65	14
1961	96	8
1960	116	5
1959	39	22
1958	123	4
1957	76	12
1956	107	6
1955	5	39
1954	60	15
1953	49	18
1952	24	27
1951	116	5
1950	123	4
1949	22	28
1948	65	14
1947	52	17
1946	83	11
1945	107	6
1944	31	25
1943	65	14
1942	90	9
1941	15	29
1940	76	12
1939	46	19
1938	60	15
1937	65	14
1936	15	29
1935	90	9
1934	31	25
1933	31	25
1932	96	8
1931	8	36
1930	15	29
1929	22	28
1928	54	16
1927	76	12
1926	76	12
1925	31	25
1924	65	14
1923	6	37
1922	28	26
1921	1	46
1920	54	16
1919	2	43
1918	15	29
1917	54	16
1916	4	42
1915	76	12
1914	9	32
1913	15	29
1912	38	23
1911	2	43
1910	31	25
1909	12	30
1908	6	37
1907	101	7
1906	65	14
1905	123	4
1904	107	6
1903	101	7
1902	86	10
1901	9	32
1900	28	26
1899	12	30
1898	11	31
1897	54	16
1896	40	21
1895	15	29
1894	15	29
1893	40	21
1892	65	14
1891	60	15
1890	137	1
1889	116	5
1888	101	7
1887	36	24
1886	116	5
1885	137	1
1884	65	14
1883	133	2

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