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Cornwall April Weather

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

Typical Cornwall April Weather 1991–2020
Average daily high	11.8 °C
Average daily low	2.0 °C
Average monthly precipitation	8.7 cm
Average monthly snow	9.7 cm
Daily chance of precipitation	40.2%
Daily chance of snow	5.8%

Cornwall April Weather Records 1867–2024
Highest temperature	31.0 °C	April 27, 2009
Lowest temperature	-18.3 °C	April 1, 1887
Highest daily low	18.0 °C	April 17, 2002
Lowest daily high	-6.1 °C	April 5, 1881
Hottest average high temperature	15.6 °C	1952
Coldest average high temperature	7.1 °C	1972
Most daily precipitation	4.6 cm	April 6, 2017
Most monthly precipitation	15.9 cm	2011
Most daily snow	35.6 cm	April 3, 1975
Most monthly snow	77.3 cm	1885

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
April 1	7.7	-1.4	27.0	-18.3
April 2	8.0	-1.1	26.0	-16.1
April 3	8.3	-0.8	29.5	-15.0
April 4	8.6	-0.6	25.0	-15.0
April 5	9.0	-0.3	18.0	-14.5
April 6	9.4	0.0	23.0	-12.8
April 7	9.8	0.3	24.5	-13.5
April 8	10.1	0.6	22.0	-13.3
April 9	10.3	0.9	25.0	-11.7
April 10	10.6	1.1	26.0	-13.9
April 11	10.8	1.2	24.5	-9.4
April 12	11.0	1.4	25.0	-10.0
April 13	11.2	1.5	25.5	-8.3
April 14	11.4	1.7	30.0	-7.2
April 15	11.7	1.8	25.0	-6.7
April 16	12.0	2.0	29.0	-7.0
April 17	12.3	2.3	29.5	-7.0
April 18	12.6	2.5	28.9	-4.4
April 19	12.9	2.8	28.9	-9.4
April 20	13.3	3.1	28.0	-4.0
April 21	13.7	3.3	27.5	-7.0
April 22	14.1	3.6	26.7	-7.0
April 23	14.4	3.8	27.8	-5.6
April 24	14.7	4.1	25.6	-5.6
April 25	15.0	4.3	29.0	-6.1
April 26	15.3	4.6	29.0	-4.4
April 27	15.6	4.8	31.0	-6.7
April 28	15.8	5.0	27.8	-3.9
April 29	16.0	5.2	27.5	-8.3
April 30	16.2	5.4	27.0	-5.0

Weather Station Details

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