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Monthly
Precipitation
Temperature
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Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
St. Clair County International, MI
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September
Average Temperature
High
23°
Feels 23
Low
11°
Feels 11
Average Precipitation
7 Days
Rain amount
20.3mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
29°
4
25°
5
24°
6
25°
7
26°
8
26°
9
30°
10
26°
11
24°
12
24°
13
24°
14
25°
15
24°
16
22°
17
23°
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Thursday, September 3, 2026
Day
29°
Feels 32
Wind
19 km/h NW
Gust
40 km/h
Humidity
66%
P.O.P
60%
Rain
5-10 mm
Night
20°
Feels 20
Wind
16 km/h W
Gust
24 km/h
Humidity
100%
P.O.P
70%
Rain
~10 mm
Historical Averages
Sep 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.