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Cornwall January Weather

Averages and records for weather in Cornwall, Ontario in the month of January.

Typical Cornwall January Weather 1991–2020
Average daily high	-3.7 °C
Average daily low	-12.0 °C
Average monthly precipitation	7.8 cm
Average monthly snow	48.9 cm
Daily chance of precipitation	44.9%
Daily chance of snow	36.6%

Cornwall January Weather Records 1867–2024
Highest temperature	18.0 °C	January 19, 1996
Lowest temperature	-43.3 °C	January 15, 1957
Highest daily low	9.0 °C	January 8, 2008
Lowest daily high	-29.0 °C	January 3, 1981
Hottest average high temperature	1.9 °C	1880
Coldest average high temperature	-10.3 °C	2004
Most daily precipitation	5.3 cm	January 30, 1966
Most monthly precipitation	18.8 cm	1978
Most daily snow	53.3 cm	January 30, 1966
Most monthly snow	136.0 cm	1977

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
January 1	-2.3	-9.6	11.0	-29.4
January 2	-2.4	-9.7	12.0	-30.0
January 3	-2.5	-9.9	9.4	-32.0
January 4	-2.6	-10.0	16.7	-35.0
January 5	-2.7	-10.2	16.7	-27.8
January 6	-2.9	-10.3	12.0	-31.7
January 7	-3.1	-10.6	12.5	-31.7
January 8	-3.3	-10.9	14.0	-34.4
January 9	-3.3	-11.0	13.0	-34.4
January 10	-3.3	-11.1	9.0	-29.4
January 11	-3.5	-11.2	15.6	-31.1
January 12	-3.6	-11.4	14.0	-31.1
January 13	-3.7	-11.6	16.0	-28.3
January 14	-3.7	-11.6	6.1	-29.4
January 15	-3.7	-11.7	17.5	-43.3
January 16	-3.8	-11.8	11.7	-32.0
January 17	-3.8	-11.9	11.7	-34.4
January 18	-3.8	-11.9	15.5	-31.0
January 19	-3.9	-11.9	18.0	-30.0
January 20	-3.9	-12.0	8.0	-27.2
January 21	-3.9	-12.0	13.9	-28.0
January 22	-3.9	-12.1	11.7	-30.0
January 23	-3.9	-12.1	12.5	-31.7
January 24	-3.9	-12.1	11.0	-33.9
January 25	-4.0	-12.2	13.3	-28.3
January 26	-4.0	-12.2	9.4	-32.8
January 27	-4.0	-12.3	12.0	-30.0
January 28	-4.1	-12.3	10.0	-27.8
January 29	-4.1	-12.4	7.2	-32.8
January 30	-4.0	-12.4	17.0	-32.2
January 31	-4.0	-12.4	14.0	-29.4

Weather Station Details

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