Charleston Area NWS Forecast
Forecast for Charleston updated at 5:37 PM on September 13, 2026
- Tonight Partly cloudy this evening, then becoming mostly clear. Lows in the mid 70s. Southwest winds 5 to 10 mph.
- Monday Sunny. Highs in the mid 90s. Heat index values up to 106. Northwest winds around 5 mph, becoming east in the afternoon.
- Monday Night Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. South winds around 5 mph, increasing to northeast 10 to 15 mph with gusts up to 25 mph after midnight.
- Tuesday Mostly sunny. Highs in the mid 80s. Northeast winds 15 to 20 mph with gusts up to 30 mph.
- Tuesday Night Mostly clear. Lows in the upper 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
- Wednesday Sunny. Highs in the mid 80s.
- Wednesday Night Mostly clear. Lows in the upper 60s.
- Thursday Sunny. Highs in the mid 80s.
- Thursday Night Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent.
- Friday Sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 30 percent.
- Friday Night Mostly clear. Lows in the lower 70s.
- Saturday Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 40 percent.
- Saturday Night Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent.
- Sunday Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 30 percent.