Weather in Saint Charles: September
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Average day temperature: | 81.7°F |
| Average night temperature: | 65.6°F | |
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Number of sunny days: | 19 days |
| Day length: | 11.8 - 13.0 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.5 in. | |
| more information | ||
14 days
forecast
forecast
| Saint Charles |
weather in
October
October
| Saint Charles |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 98°F. At the same time the lowest night temperature was 55°F. Daily and nightly averages during September were 84.6°F and 66.0°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in Saint Charles in September is 0.5 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 6.6 mph It makes September one of the least windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 9.0.
Best time for vacation in Saint Charles
Saint Charles on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Saint Charles
Local time: 22:44
December 05, friday
0000
5°F
NW
2 mph
2 mph
0300
5°F
N
2 mph
2 mph
0600
7°F
N
4 mph
4 mph
0900
21°F
N
4 mph
4 mph
1200
30°F
N
7 mph
7 mph
1500
41°F
N
6 mph
6 mph
1800
41°F
N
5 mph
5 mph
2100
37°F
NE
6 mph
6 mph
