The weather in Charleston in August is very hot. The average temperatures are between 25°C and 31°C, drinking water regularly is advisable.
There’s going to be many days of rain during the month of August in Charleston.
Charleston should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Our weather forecast can give you a great sense of what weather to expect in Charleston in August 2025.
If you’re planning to visit Charleston in the near future, we highly recommend that you review the 14 day weather forecast for Charleston before you arrive.
Temperatures
31° / 25°
Rainy Days
15
Snowy Days
0
Dry Days
16
Rainfall
346
mm
Sun Hours
11.2
Hrs
