Weather in Charleston: September
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Average day temperature: | 77.3°F |
| Average night temperature: | 60.8°F | |
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Number of sunny days: | 15 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
| Charleston |
weather in
October
October
| Charleston |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 90°F. At the same time the lowest night temperature was 47°F. Daily and nightly averages during September were 77.7°F and 60.8°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 Charleston 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 4.2 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: 7.9.
Best time for vacation in Charleston
Charleston on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Charleston
Local time: 05:24
May 17, sunday
0600
59°F
N
4 mph
4 mph
0900
72°F
N
2 mph
2 mph
1200
88°F
NE
4 mph
4 mph
1500
91°F
NE
5 mph
5 mph
1800
86°F
NE
5 mph
5 mph
2100
73°F
N
2 mph
2 mph
May 18, monday
0000
66°F
N
3 mph
3 mph
0300
64°F
N
4 mph
4 mph
