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Cornwall June Weather

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

Typical Cornwall June Weather 1991–2020
Average daily high	24.7 °C
Average daily low	14.1 °C
Average monthly precipitation	9.1 cm
Average monthly snow	none
Daily chance of precipitation	41.8%
Daily chance of snow	0%

Cornwall June Weather Records 1867–2024
Highest temperature	35.6 °C	June 18, 1870
Lowest temperature	0.6 °C	June 4, 1953
Highest daily low	24.0 °C	June 18, 2018
Lowest daily high	9.4 °C	June 15, 1959
Hottest average high temperature	27.3 °C	1884
Coldest average high temperature	20.8 °C	1985
Most daily precipitation	6.7 cm	June 13, 2003
Most monthly precipitation	18.3 cm	1998
Most daily snow	none	-
Most monthly snow	none	-

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
June 1	22.3	11.6	34.5	1.0
June 2	22.5	11.8	33.0	2.8
June 3	22.7	12.0	33.3	3.0
June 4	22.9	12.2	34.4	0.6
June 5	23.1	12.4	30.0	1.7
June 6	23.2	12.6	32.8	1.1
June 7	23.4	12.8	33.0	1.7
June 8	23.5	12.9	31.5	1.7
June 9	23.6	13.0	31.0	2.0
June 10	23.8	13.2	31.0	2.5
June 11	24.0	13.4	32.5	2.8
June 12	24.2	13.6	32.0	5.0
June 13	24.3	13.7	32.0	5.6
June 14	24.5	13.9	33.5	5.6
June 15	24.6	14.0	34.0	2.8
June 16	24.7	14.2	33.5	3.3
June 17	24.9	14.3	34.5	3.9
June 18	25.1	14.5	35.6	3.3
June 19	25.3	14.7	32.5	1.7
June 20	25.5	14.9	33.5	5.6
June 21	25.7	15.0	34.0	2.5
June 22	25.8	15.2	35.0	4.4
June 23	25.9	15.3	34.0	4.4
June 24	26.0	15.4	33.9	5.6
June 25	26.1	15.6	33.9	6.5
June 26	26.1	15.6	33.5	6.1
June 27	26.2	15.7	35.0	7.2
June 28	26.4	15.8	33.5	7.8
June 29	26.5	15.9	33.3	5.0
June 30	26.6	16.1	35.0	6.1

Weather Station Details

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