| NWS Forecast for: Charleston County Issued by: National Weather Service Charleston, SC Last Update: 537 PM EDT Wed Jul 22 2026 |  |
| Tonight: Mostly cloudy this evening, then becoming partly cloudy. Lows around 80. South winds 10 to 15 mph with gusts up to 25 mph. Thursday: Partly sunny. Highs in the lower 90s. Heat index values up to 109. Southwest winds 10 to 15 mph. Thursday Night: Mostly cloudy. Lows in the upper 70s. Heat index values up to 105 early in the evening. South winds 10 to 15 mph. Friday: Partly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 90s. South winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 109. Friday Night: Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the upper 70s. South winds 5 to 10 mph. Chance of rain 50 percent. Saturday: Showers and thunderstorms likely. Highs around 90. Chance of rain 70 percent. Heat index values up to 105. Saturday Night: Showers likely with a chance of thunderstorms. Lows in the mid 70s. Chance of rain 70 percent. Sunday: Showers and thunderstorms likely. Highs around 90. Chance of rain 70 percent. Heat index values up to 105. Sunday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Monday: Mostly sunny. Highs in the lower 90s. Heat index values up to 105. Monday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 20 percent. Tuesday: 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. Tuesday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the upper 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. Wednesday: Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up to 110. | |
| Zone Forecast: Charleston County | |
Visit your local NWS office at: https://www.weather.gov/chs |