Charleston Weather in September
United States · 30-year monthly averages
🤔 Fair time to visit
September in Charleston is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 20°C (68°F). Expect roughly 153mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
Avg high
30°C
85°F
Avg low
20°C
68°F
Rainfall
153mm
rainy
Rainy days
8
days with ≥1mm
🎒 What to pack
- light summer clothing
- sunscreen and sunglasses
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Charleston in September?
- September in Charleston is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 20°C (68°F). Expect roughly 153mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
- Does it rain a lot in Charleston in September?
- Charleston sees around 153mm of precipitation in September on average — rainy by global standards.
- Is September a good time to visit Charleston?
- September is a workable month to visit Charleston, but expect some weather trade-offs.