Monthly Historical AveragesSt. Charles, ON
Average Temperature
High
19°
Feels 19
Low
7°
Feels 4
Average Precipitation
10 Days
73.8mm
0.9cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastMonday, May 18, 2026
Day
24°Feels 30
Wind
20 km/h SW
Gust
44 km/h
Humidity
65%
P.O.P
40%
Rain
~1 mm
Night
14°Feels 13
Wind
19 km/h S
Gust
34 km/h
Humidity
100%
P.O.P
70%
Rain
~5 mm
Historical AveragesMay 18
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity