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Hourly
7 Days
14 Days
Weekend
Monthly
°C
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°Celsius
°Fahrenheit
Monthly Historical Averages
Sarnia, ON
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March
Average Temperature
High
5°
Feels 3
Low
-3°
Feels -7
Average Precipitation
4 Days
Rain amount
8mm
Snow amount
3.5cm
Daily Historical Averages
March 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
16°
8
11°
9
16°
10
14°
11
13°
12
0°
13
7°
14
2°
15
3°
16
-2°
17
-3°
18
-1°
19
2°
20
3°
21
4°
22
23
24
25
26
27
28
29
30
31
Forecast
Saturday, March 7, 2026
Day
16°
Feels 14
Wind
35 km/h SW
Gust
56 km/h
Humidity
88%
P.O.P
90%
Rain
1-3 mm
Night
3°
Feels -2
Wind
33 km/h W
Gust
50 km/h
Humidity
94%
P.O.P
60%
Rain
<1 mm
Historical Averages
Mar 7
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.