Monthly Historical AveragesSarnia, ON
Average Temperature
High
26°
Feels 27
Low
16°
Feels 16
Average Precipitation
11 Days
45.1mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastTuesday, August 4, 2026
Day
28°Feels 33
Wind
14 km/h S
Gust
24 km/h
Humidity
37%
P.O.P
0%
Night
15°Feels 14
Wind
18 km/h S
Gust
27 km/h
Humidity
94%
P.O.P
0%
Historical AveragesAug 4
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity