What is the weather like in Charleston vs Washington in September?

In September, Charleston averages 29°C high / 23°C low with about 142 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.

Charleston vs Washington in September

Washington is the better pick in September — 80 vs 69 on SeasonMap's comfort score. Washington is hot, rainy, clean air, while Charleston is hot, rainy, clean air.

Charleston vs Washington — September climate, side by side

	Charleston	Washington
Comfort score	69/100 (C)	80/100 (A)
Feels-like high	32°C	30°C
Avg high / low	29° / 23°	28° / 17°
Rainfall	142 mm	108 mm
Rainy days	6	8
Humidity	80%	74%
Air quality (AQI)	46	47

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Charleston vs Washington in September — FAQ

Is September better in Charleston or Washington?: Washington is the better pick in September — 80 vs 69 on SeasonMap's comfort score. Washington is hot, rainy, clean air, while Charleston is hot, rainy, clean air.
What is the weather like in Charleston vs Washington in September?: In September, Charleston averages 29°C high / 23°C low with about 142 mm of rain; Washington averages 28°C high / 17°C low with about 108 mm.