Monthly Historical AveragesSt. Marys, ON
Average Temperature
High
20°
Feels 20
Low
8°
Feels 6
Average Precipitation
10 Days
39.8mm
0.1cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, May 3, 2026
Day
14°Feels 12
Wind
31 km/h SW
Gust
47 km/h
Humidity
47%
P.O.P
40%
Rain
<1 mm
Night
8°Feels 4
Wind
35 km/h SW
Gust
53 km/h
Humidity
81%
P.O.P
60%
Rain
~1 mm
Historical AveragesMay 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity