Monthly Historical AveragesSarnia, ON
Average Temperature
High
26°
Feels 27
Low
16°
Feels 16
Average Precipitation
10 Days
39.8mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, August 6, 2026
Day
26°Feels 35
Wind
12 km/h W
Gust
18 km/h
Humidity
70%
P.O.P
40%
Rain
1-3 mm
Night
21°Feels 25
Wind
9 km/h NE
Gust
20 km/h
Humidity
94%
P.O.P
40%
Rain
<1 mm
Historical AveragesAug 6
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity