Charleston Area NWS Forecast
Forecast for Charleston updated at 8:42 PM on September 11, 2026
- Tonight Mostly cloudy this evening, then becoming partly cloudy. A slight chance of thunderstorms. A slight chance of showers. Lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.
- Saturday Mostly 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. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
- Saturday Night Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.
- Sunday Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
- Sunday Night Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
- Monday Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 105.
- Monday Night Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent.
- Tuesday Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 20 percent.
- Tuesday Night Mostly clear. Lows in the upper 60s.
- Wednesday Sunny with a 20 percent chance of showers. Highs in the mid 80s.
- Wednesday Night Mostly clear. Lows around 70.
- Thursday Sunny. Highs in the mid 80s.
- Thursday Night Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent.
- Friday Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent.