Monthly Historical AveragesPetrolia, ON
Average Temperature
High
21°
Feels 21
Low
8°
Feels 6
Average Precipitation
10 Days
36.8mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, May 7, 2026
Day
12°Feels 10
Wind
21 km/h W
Gust
38 km/h
Humidity
41%
P.O.P
40%
Rain
<1 mm
Night
4°Feels 1
Wind
20 km/h W
Gust
34 km/h
Humidity
93%
P.O.P
40%
Rain
<1 mm
Historical AveragesMay 7
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity