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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Cornwall, ON
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August
Average Temperature
High
26°
Feels 27
Low
14°
Feels 14
Average Precipitation
12 Days
Rain amount
94mm
Snow amount
0cm
Content continues below
Daily Historical Averages
August 2026
S
M
T
W
T
F
S
1
2
3
4
28°
5
29°
6
29°
7
28°
8
27°
9
27°
10
27°
11
26°
12
23°
13
23°
14
23°
15
23°
16
23°
17
24°
18
24°
19
20
21
22
23
24
25
26
27
28
29
30
31
Forecast
Tuesday, August 4, 2026
Day
28°
Feels 32
Wind
22 km/h SW
Gust
32 km/h
Humidity
42%
P.O.P
0%
Night
16°
Feels 16
Wind
20 km/h SW
Gust
26 km/h
Humidity
88%
P.O.P
0%
Historical Averages
Aug 4
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.