Monthly Historical AveragesSt. Williams, ON
Average Temperature
High
17°
Feels 16
Low
8°
Feels 6
Average Precipitation
12 Days
64.6mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, May 22, 2026
Day
17°Feels 16
Wind
37 km/h E
Gust
55 km/h
Humidity
39%
P.O.P
30%
Night
12°Feels 8
Wind
32 km/h E
Gust
49 km/h
Humidity
94%
P.O.P
90%
Rain
1-3 mm
Historical AveragesMay 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity