Weather in Charleston in September
Charleston, United States averages a high of 27.6°C (81.7°F) and low of 22°C (71.6°F) in September, with 13 rain days and 9.8 hours of daily sunshine. Travel score: 76.3/100 (Good). The best time to visit Charleston is April.
High
28°C82°F
Low
22°C72°F
🌧️
13
rain days
☀️
9.8
hrs/day sunshine
💧
79%
humidity
76— Good
September in Charleston is warm and occasionally wet — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Charleston?
How much does it rain in Charleston in September?
Charleston receives an average of 126.9mm of rainfall across 13 rainy days in September. The annual total is 1156.3mm.
What should I pack for Charleston in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 28°C
🧴
Sunscreen SPF 30+
10 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Recommended
🧥
Light rain jacket
Some rainy days expected (13 days)
☔
Umbrella
Be prepared for occasional showers
Traveling to United States in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31