Average Temperature in Cornwall by Year

This page contains a list of the average yearly high and low temperatures in Cornwall, Ontario for each year between 1872 and 2023. It is based on NOAA data.

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What Was the Hottest Year Ever in Cornwall?

1998 was the warmest year in the history of Cornwall, Ontario. The average daily high temperature was 13.9 °C, and the average low was 4.8 °C.

What Was the Coldest Year Ever in Cornwall?

1885 was the coolest year in the history of Cornwall, Ontario. The average daily high temperature was 9.7 °C, and the average low was -0.7 °C.

* click column headers to sort

Year	Rank	High (°C)	Low (°C)
2023	7	13.4	4.4
2022	17	13.1	3.3
2021	9	13.5	4.2
2020	6	13.8	4.3
2019	27	12.1	2.9
2018	15	12.8	3.7
2017	14	12.6	4.0
2016	10	13.4	4.0
2015	19	12.7	3.0
2014	36	11.7	3.1
2013	25	12.1	3.2
2012	2	13.9	4.6
2010	3	13.2	5.0
2009	39	11.7	2.8
2008	20	12.3	3.4
2006	8	13.1	4.7
2005	16	12.6	3.8
2004	40	11.8	2.6
2003	38	11.9	2.7
2002	11	13.3	4.0
2001	5	13.9	4.2
2000	29	12.0	3.0
1999	4	14.0	4.2
1998	1	13.9	4.8
1997	48	11.8	2.1
1996	35	11.9	2.9
1995	37	12.3	2.4
1994	44	11.8	2.2
1993	53	11.3	2.2
1992	62	11.0	1.9
1991	12	13.3	3.7
1990	13	12.8	4.0
1989	55	11.4	2.1
1988	23	12.2	3.2
1987	18	12.4	3.5
1986	42	11.6	2.7
1985	49	11.2	2.6
1984	31	11.8	3.0
1983	28	11.8	3.2
1982	50	11.4	2.3
1981	33	11.6	3.2
1980	67	10.7	1.8
1979	30	11.6	3.2
1978	70	10.6	1.6
1977	45	11.4	2.6
1976	71	10.7	1.2
1975	24	12.2	3.1
1974	63	10.7	2.2
1973	22	12.0	3.5
1972	74	9.9	1.4
1971	58	11.3	2.0
1970	64	10.7	2.0
1969	56	10.9	2.6
1968	66	10.7	1.9
1967	61	11.1	1.9
1966	51	11.3	2.3
1965	60	11.3	1.8
1964	32	12.3	2.5
1963	68	11.0	1.4
1962	69	10.9	1.5
1961	46	11.3	2.6
1960	47	11.6	2.3
1959	43	11.9	2.2
1957	65	11.9	0.7
1956	76	11.2	-0.4
1955	57	12.4	1.0
1953	21	13.2	2.4
1952	34	13.7	1.1
1951	52	12.8	0.8
1887	77	10.8	-0.3
1886	75	11.0	0.1
1885	82	9.7	-0.7
1884	73	11.0	0.3
1883	80	10.4	-0.9
1882	72	11.1	0.7
1881	54	12.1	1.4
1880	59	12.2	0.9
1879	79	10.8	-0.3
1878	26	12.4	2.8
1877	41	12.3	2.0
1873	81	10.4	-1.1
1872	78	11.3	-0.7

Weather Station Details

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