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Cornwall July Weather

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

Typical Cornwall July Weather 1991–2020
Average daily high	27.3 °C
Average daily low	16.9 °C
Average monthly precipitation	9.7 cm
Average monthly snow	none
Daily chance of precipitation	37.9%
Daily chance of snow	0%

Cornwall July Weather Records 1867–2024
Highest temperature	37.8 °C	July 14, 1868
Lowest temperature	3.3 °C	July 30, 1952
Highest daily low	26.0 °C	July 1, 2014
Lowest daily high	15.5 °C	July 24, 2017
Hottest average high temperature	31.3 °C	1955
Coldest average high temperature	23.7 °C	1884
Most daily precipitation	7.3 cm	July 17, 1977
Most monthly precipitation	18.7 cm	1996
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
July 1	26.6	16.2	35.0	5.6
July 2	26.7	16.3	35.0	6.5
July 3	26.8	16.4	34.4	4.0
July 4	26.9	16.4	35.0	5.6
July 5	26.9	16.5	35.0	5.6
July 6	27.0	16.6	34.0	6.7
July 7	27.1	16.7	35.0	8.3
July 8	27.1	16.7	34.5	7.2
July 9	27.1	16.8	36.0	8.3
July 10	27.1	16.9	37.5	5.6
July 11	27.1	16.8	34.5	5.6
July 12	27.1	16.9	35.0	6.7
July 13	27.2	16.9	35.6	5.0
July 14	27.2	16.9	37.8	8.3
July 15	27.3	17.0	36.7	7.8
July 16	27.3	17.0	35.5	7.2
July 17	27.3	17.0	34.0	7.2
July 18	27.4	17.1	33.9	7.2
July 19	27.4	17.1	34.0	7.2
July 20	27.4	17.1	34.5	7.2
July 21	27.4	17.2	35.0	8.3
July 22	27.3	17.1	35.6	9.0
July 23	27.3	17.1	35.6	9.4
July 24	27.3	17.1	33.0	10.5
July 25	27.4	17.0	36.1	4.4
July 26	27.3	17.1	34.0	7.2
July 27	27.3	17.1	33.3	6.7
July 28	27.3	17.1	32.8	9.4
July 29	27.3	17.1	33.5	5.6
July 30	27.2	17.0	32.8	3.3
July 31	27.2	17.0	33.3	4.4

Weather Station Details

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