Charleston Weather in August

The climate in Charleston during August can be summarized as hot, humid and reasonably dry.

August is in the summer in Charleston and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 17°C (63°F) is normal.

On average August is the 5th driest month of the year in Charleston with around 79mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.1 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Charleston in August 2024.