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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 9:27 pm EDT Sep 9, 2026

Overnight Low: 76 °F Slight Chance T-storms Thursday High: 90 °F Chance Showers then Chance T-storms Thursday Night Low: 77 °F Partly Cloudy Friday High: 91 °F Chance T-storms Friday Night Low: 77 °F Partly Cloudy then Chance Showers Saturday High: 89 °F Showers Likely Saturday Night Low: 76 °F Slight Chance T-storms then Chance T-storms Sunday High: 90 °F Chance T-storms Sunday Night Low: 76 °F Chance T-storms

Overnight: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Calm wind. Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 90. Heat index values as high as 103. Calm wind becoming south 5 to 8 mph in the afternoon. Chance of precipitation is 30%. Thursday Night: Partly cloudy, with a low around 77. South wind 3 to 6 mph. Friday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. Heat index values as high as 105. Calm wind becoming south 5 to 8 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Friday Night: A 30 percent chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 77. Southwest wind 3 to 7 mph. Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Mostly sunny, with a high near 89. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 76. Sunday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 90. Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 76. Monday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 90. Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. Tuesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Tuesday Night: A chance of thunderstorms. Partly cloudy, with a low around 76. Chance of precipitation is 30%. Wednesday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 88.

Charleston SCSimilar City Names  32.79°N 80.01°W (Elev. 10 ft)

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