About Charleston, SC's Climate & Weather History

Charleston, in South Carolina, United States, is home to roughly 133,000 people in the Eastern Time Zone at 32.8°N latitude.

In 2025, Charleston recorded an average annual temperature of 66°F. The hottest temperatures reached 99°F in July; the coolest were 22°F in January. Total precipitation for the year was 47 inches, with the wettest month being August. Snowfall for the year totaled approximately 3 inches.