Monthly Historical AveragesSarnia, ON
Average Temperature
High
-1°
Feels -5
Low
-8°
Feels -14
Average Precipitation
3 Days
3.5mm
4.8cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, January 31, 2026
Day
-9°Feels -16
Wind
24 km/h N
Gust
34 km/h
Humidity
72%
P.O.P
40%
Snow
<1 cm
Night
-13°Feels -21
Wind
24 km/h N
Gust
35 km/h
Humidity
85%
P.O.P
30%
Historical AveragesJan 31
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity