Charleston Area NWS Forecast
Forecast for Charleston updated at 7:30 PM on August 29, 2026
- Tonight Mostly cloudy. A slight chance of showers and thunderstorms this evening, then a chance of showers and thunderstorms after midnight. Lows in the mid 70s. East winds around 5 mph. Chance of rain 50 percent.
- Sunday Partly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the upper 80s. Northeast winds around 5 mph, becoming east in the afternoon. Chance of rain 50 percent.
- Sunday Night A slight chance of thunderstorms in the evening. Mostly cloudy with a slight chance of showers. Lows in the mid 70s. Southeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent.
- Monday Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s, except in the upper 80s near the coast. North winds around 5 mph, becoming east in the afternoon. Chance of rain 20 percent.
- Monday Night Partly cloudy. A slight chance of showers and thunderstorms in the evening. Lows in the mid 70s. Southeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent.
- Tuesday Mostly sunny. Highs around 90.
- Tuesday Night Mostly clear. Lows in the mid 70s.
- Wednesday Sunny. Highs in the lower 90s. Heat index values up to 105.
- Wednesday Night Mostly clear. Lows in the mid 70s.
- Thursday Sunny. Highs in the lower 90s. Heat index values up to 105.
- Thursday Night Mostly clear. Lows in the mid 70s.
- Friday Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 110.
- Friday Night Mostly clear. Lows in the mid 70s.
- Saturday Sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 110.