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7 Days
14 Days
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Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Saint Louis, MO
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September
Average Temperature
High
27°
Feels 29
Low
17°
Feels 17
Average Precipitation
9 Days
Rain amount
66.9mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
30°
14
31°
15
37°
16
35°
17
36°
18
34°
19
36°
20
23°
21
20°
22
20°
23
24°
24
26°
25
25°
26
25°
27
33°
28
29
30
Forecast
Sunday, September 13, 2026
Day
30°
Feels 33
Wind
13 km/h N
Gust
19 km/h
Humidity
55%
P.O.P
40%
Rain
<1 mm
Night
19°
Feels 19
Wind
13 km/h NE
Gust
19 km/h
Humidity
72%
P.O.P
40%
Rain
<1 mm
Historical Averages
Sep 13
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.