Charleston
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Charleston Weather in September

During September, Charleston experiences high daytime temperatures of 28°C (82°F) and cooler nights around 15°C (59°F). Expect quite a bit of rainfall. Around 99 mm (3.9 in) is typical.

Rainfall in Charleston in September

Looking at the last 30 years, the data shows about 8 days with rain, averaging 99 mm (3.9 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Charleston in September

Weather in Charleston is at its excellent in September. Highs reach 28°C (82°F), while nights settle around 15°C (59°F). Overall, the month follows a fairly predictable daily temperature pattern. At 15°C (59°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Charleston.

Charleston Temperature in September

Min Temperature
15°C (59°F)
Max Temperature
28°C (82°F)
Chance of Rain
27%
Precipitation
99 mm (3.9 in)
Rainy days
8 days

Charleston Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Charleston - and find the best time to visit.

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Charleston in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.

What To Do in Charleston in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    8/10
  • Outdoor sports
    7/10

Charleston 3-Day Forecast

More climate data for Charleston

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.