Number of Days of 20 °C in Cornwall by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 20 degrees Celsius in Cornwall, Ontario, between 1867 and 2024.

Also see:

Which year had the most 20° days?

Based on NOAA records, the year 2021 holds the record for the most 20 °C days in Cornwall history. There were 145 days with a high temperature of at least 20 degrees that year.

How many so far this year (2024)?

As of April 27, there have been 6 days this year where the high temperature has reached at least 20 degrees Celsius in Cornwall, Ontario.

The last time it reached at least 20° C was April 27, 2024.

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

Year	Rank	Days >= 20 °C
2024	92	6
2023	5	141
2022	4	142
2021	1	145
2020	23	130
2019	49	120
2018	44	121
2017	7	140
2016	11	139
2015	14	138
2014	26	129
2013	20	132
2012	11	139
2011	64	118
2010	33	125
2009	56	119
2008	75	116
2007	44	121
2006	38	123
2005	16	135
2004	29	127
2003	20	132
2002	16	135
2001	7	140
2000	64	118
1999	7	140
1998	2	144
1997	56	119
1996	30	126
1995	23	130
1994	34	124
1993	64	118
1992	56	119
1991	14	138
1990	49	120
1989	38	123
1988	72	117
1987	56	119
1986	64	118
1985	56	119
1984	49	120
1983	49	120
1982	44	121
1981	56	119
1980	64	118
1979	64	118
1978	42	122
1977	64	118
1976	49	120
1975	34	124
1974	78	115
1973	82	110
1972	80	114
1971	30	126
1970	56	119
1969	82	110
1968	38	123
1967	44	121
1966	75	116
1965	75	116
1964	90	84
1963	44	121
1962	72	117
1961	38	123
1960	34	124
1959	26	129
1958	87	103
1957	20	132
1956	81	112
1955	11	139
1954	91	40
1953	42	122
1952	5	141
1951	3	143
1950	93	1
1949	94	0
1948	94	0
1947	94	0
1946	94	0
1945	94	0
1944	94	0
1943	94	0
1942	94	0
1941	94	0
1940	94	0
1939	94	0
1938	94	0
1937	94	0
1936	94	0
1935	94	0
1934	94	0
1933	94	0
1932	94	0
1931	94	0
1930	94	0
1929	94	0
1928	94	0
1927	94	0
1926	94	0
1925	94	0
1924	94	0
1923	94	0
1922	94	0
1921	94	0
1920	94	0
1919	94	0
1918	94	0
1917	94	0
1916	94	0
1915	94	0
1914	94	0
1913	94	0
1912	94	0
1911	94	0
1910	94	0
1909	94	0
1908	94	0
1907	94	0
1906	94	0
1905	94	0
1904	94	0
1903	94	0
1902	94	0
1901	94	0
1900	94	0
1899	94	0
1898	94	0
1897	94	0
1896	94	0
1895	94	0
1894	94	0
1893	94	0
1892	94	0
1891	94	0
1890	94	0
1889	94	0
1888	94	0
1887	30	126
1886	19	133
1885	49	120
1884	34	124
1883	56	119
1882	85	104
1881	16	135
1880	7	140
1879	49	120
1878	26	129
1877	23	130
1876	94	0
1875	94	0
1874	94	0
1873	78	115
1872	72	117
1871	89	95
1870	88	99
1869	64	118
1868	84	106
1867	85	104

Weather Station Details

Years	Station	Coordinates
1950–2024	Cornwall	location
1867–1887	Cornwall	location