Number of Days of 25 °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 25 degrees Celsius in London, Ontario, between 1883 and 2024.

Also see:

Which year had the most 25° days?

Based on NOAA records, the year 1908 holds the record for the most 25 °C days in London history. There were 111 days with a high temperature of at least 25 degrees that year.

How many so far this year (2024)?

It has not reached 25 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 25° C was October 4, 2023.

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

Year	Rank	Days >= 25 °C
2024	142	0
2023	116	55
2022	40	81
2021	53	75
2020	40	81
2019	71	70
2018	24	86
2017	66	72
2016	13	91
2015	75	69
2014	102	59
2013	110	56
2012	16	89
2011	43	80
2010	45	78
2009	139	40
2008	82	68
2007	29	85
2006	86	66
2005	12	93
2004	137	46
2003	93	64
2002	10	94
2001	86	66
2000	126	53
1999	45	78
1998	16	89
1997	135	47
1996	103	58
1995	59	74
1994	121	54
1993	108	57
1992	140	32
1991	16	89
1990	130	52
1989	86	66
1988	75	69
1987	51	76
1986	121	54
1985	108	57
1984	110	56
1983	40	81
1982	134	48
1981	126	53
1980	101	60
1979	121	54
1978	62	73
1977	66	72
1976	93	64
1975	93	64
1974	110	56
1973	51	76
1972	126	53
1971	50	77
1970	53	75
1969	62	73
1968	116	55
1967	121	54
1966	93	64
1965	130	52
1964	103	58
1963	71	70
1962	38	82
1961	45	78
1960	86	66
1959	16	89
1958	110	56
1957	103	58
1956	103	58
1955	24	86
1954	69	71
1953	62	73
1952	53	75
1951	86	66
1950	132	51
1949	20	87
1948	97	62
1947	53	75
1946	82	68
1945	116	55
1944	53	75
1943	59	74
1942	69	71
1941	32	84
1940	103	58
1939	36	83
1938	75	69
1937	82	68
1936	38	82
1935	121	54
1934	36	83
1933	32	84
1932	97	62
1931	10	94
1930	3	103
1929	53	75
1928	75	69
1927	82	68
1926	86	66
1925	29	85
1924	110	56
1923	20	87
1922	2	105
1921	3	103
1920	14	90
1919	7	98
1918	45	78
1917	100	61
1916	29	85
1915	75	69
1914	24	86
1913	14	90
1912	59	74
1911	6	100
1910	43	80
1909	24	86
1908	1	111
1907	110	56
1906	32	84
1905	71	70
1904	116	55
1903	75	69
1902	116	55
1901	24	86
1900	5	102
1899	8	96
1898	20	87
1897	75	69
1896	45	78
1895	9	95
1894	20	87
1893	32	84
1892	66	72
1891	62	73
1890	141	6
1889	86	66
1888	126	53
1887	71	70
1886	135	47
1885	133	49
1884	97	62
1883	137	46

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