Number of Days of 30 °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 30 degrees Celsius in Cornwall, Ontario, between 1867 and 2024.

Also see:

Which year had the most 30° days?

Based on NOAA records, the year 1955 holds the record for the most 30 °C days in Cornwall history. There were 43 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 Cornwall so far in 2024. As of April 27, the highest temperature this year is 75 °F.

The last time it reached at least 30° C was October 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	91	0
2023	26	20
2022	26	20
2021	15	26
2020	2	40
2019	21	22
2018	3	39
2017	49	12
2016	5	33
2015	29	18
2014	64	9
2013	49	12
2012	4	36
2011	21	22
2010	20	23
2009	63	10
2008	64	9
2007	38	15
2006	31	17
2005	9	30
2004	77	5
2003	31	17
2002	11	28
2001	8	32
2000	86	3
1999	5	33
1998	49	12
1997	49	12
1996	77	5
1995	16	25
1994	58	11
1993	49	12
1992	77	5
1991	9	30
1990	58	11
1989	36	16
1988	11	28
1987	36	16
1986	74	6
1985	64	9
1984	44	14
1983	21	22
1982	69	8
1981	77	5
1980	71	7
1979	49	12
1978	38	15
1977	38	15
1976	69	8
1975	17	24
1974	89	2
1973	38	15
1972	77	5
1971	45	13
1970	45	13
1969	58	11
1968	71	7
1967	84	4
1966	45	13
1965	64	9
1964	71	7
1963	29	18
1962	74	6
1961	64	9
1960	58	11
1959	21	22
1958	86	3
1957	74	6
1956	77	5
1955	1	43
1954	91	0
1953	31	17
1952	21	22
1951	84	4
1950	91	0
1949	91	0
1948	91	0
1947	91	0
1946	91	0
1945	91	0
1944	91	0
1943	91	0
1942	91	0
1941	91	0
1940	91	0
1939	91	0
1938	91	0
1937	91	0
1936	91	0
1935	91	0
1934	91	0
1933	91	0
1932	91	0
1931	91	0
1930	91	0
1929	91	0
1928	91	0
1927	91	0
1926	91	0
1925	91	0
1924	91	0
1923	91	0
1922	91	0
1921	91	0
1920	91	0
1919	91	0
1918	91	0
1917	91	0
1916	91	0
1915	91	0
1914	91	0
1913	91	0
1912	91	0
1911	91	0
1910	91	0
1909	91	0
1908	91	0
1907	91	0
1906	91	0
1905	91	0
1904	91	0
1903	91	0
1902	91	0
1901	91	0
1900	91	0
1899	91	0
1898	91	0
1897	91	0
1896	91	0
1895	91	0
1894	91	0
1893	91	0
1892	91	0
1891	91	0
1890	91	0
1889	91	0
1888	91	0
1887	11	28
1886	49	12
1885	77	5
1884	17	24
1883	89	2
1882	58	11
1881	31	17
1880	17	24
1879	49	12
1878	38	15
1877	31	17
1876	91	0
1875	91	0
1874	91	0
1873	86	3
1872	26	20
1871	45	13
1870	5	33
1869	49	12
1868	11	28
1867	38	15

Weather Station Details

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