Monthly Historical AveragesSt. Clair, ON
Average Temperature
High
21°
Feels 21
Low
8°
Feels 7
Average Precipitation
10 Days
38.8mm
0.1cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, May 9, 2026
Day
20°Feels 20
Wind
38 km/h S
Gust
57 km/h
Humidity
49%
P.O.P
70%
Rain
2-4 mm
Night
4°Feels 1
Wind
28 km/h NW
Gust
42 km/h
Humidity
81%
P.O.P
40%
Rain
<1 mm
Historical AveragesMay 9
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity