< Previous Month Next Month >

Cornwall March Weather

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

Typical Cornwall March Weather 1991–2020
Average daily high	3.6 °C
Average daily low	-5.2 °C
Average monthly precipitation	6.3 cm
Average monthly snow	32.8 cm
Daily chance of precipitation	34.4%
Daily chance of snow	21.2%

Cornwall March Weather Records 1867–2024
Highest temperature	26.0 °C	March 21, 2012
Lowest temperature	-32.2 °C	March 13, 1885
Highest daily low	12.0 °C	March 31, 2021
Lowest daily high	-17.2 °C	March 5, 1887
Hottest average high temperature	9.5 °C	2012
Coldest average high temperature	-4.7 °C	1885
Most daily precipitation	4.2 cm	March 17, 1973
Most monthly precipitation	13.2 cm	1955
Most daily snow	38.1 cm	March 4, 1971
Most monthly snow	91.4 cm	1870

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
March 1	0.2	-8.1	10.0	-27.8
March 2	0.4	-8.0	15.0	-28.3
March 3	0.6	-7.8	14.0	-27.0
March 4	0.8	-7.6	13.0	-22.2
March 5	0.9	-7.4	17.2	-30.6
March 6	1.1	-7.3	16.5	-25.0
March 7	1.2	-7.2	15.5	-25.0
March 8	1.3	-7.1	16.0	-23.9
March 9	1.5	-7.0	21.0	-22.2
March 10	1.6	-6.8	13.5	-25.6
March 11	1.9	-6.7	17.0	-23.9
March 12	2.1	-6.5	18.9	-28.3
March 13	2.4	-6.2	17.0	-32.2
March 14	2.8	-5.9	19.0	-21.1
March 15	3.1	-5.6	14.0	-21.5
March 16	3.4	-5.3	16.0	-18.9
March 17	3.7	-5.0	20.0	-21.7
March 18	3.9	-4.7	24.0	-24.4
March 19	4.2	-4.4	24.0	-23.3
March 20	4.6	-4.2	25.0	-22.2
March 21	4.8	-3.9	26.0	-24.4
March 22	5.0	-3.7	25.0	-21.7
March 23	5.2	-3.5	21.5	-25.0
March 24	5.4	-3.3	18.0	-22.2
March 25	5.6	-3.1	21.0	-18.9
March 26	5.9	-2.9	22.0	-19.4
March 27	6.2	-2.6	21.7	-16.7
March 28	6.4	-2.4	21.0	-17.2
March 29	6.7	-2.2	20.0	-17.2
March 30	7.0	-2.0	25.6	-16.1
March 31	7.3	-1.7	26.0	-14.4

Weather Station Details

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