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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 8:32 pm EDT Sep 4, 2026

Tonight Low: 77 °F Mostly Clear Saturday High: 93 °F Sunny Saturday Night Low: 78 °F Mostly Clear then Chance T-storms Sunday High: 92 °F Sunny then Heavy Rain Sunday Night Low: 74 °F Heavy Rain then Showers Labor Day High: 85 °F Showers Likely then T-storms Likely Monday Night Low: 73 °F T-storms Likely then Chance T-storms Tuesday High: 85 °F Chance Showers then Chance T-storms Tuesday Night Low: 74 °F Chance T-storms then Slight Chance Showers

Heat Advisory Tonight: Mostly clear, with a low around 77. South wind around 5 mph becoming calm in the evening. Saturday: Sunny, with a high near 93. Heat index values as high as 109. Calm wind becoming southwest 5 to 9 mph in the afternoon. Saturday Night: A chance of showers and thunderstorms between 1am and 2am. Mostly clear, with a low around 78. Southwest wind 5 to 8 mph. Chance of precipitation is 30%. Sunday: Showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Some of the storms could produce heavy rainfall. Mostly sunny, with a high near 92. Heat index values as high as 106. Southwest wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible. Sunday Night: Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could produce heavy rainfall. Low around 74. South wind around 6 mph becoming northeast in the evening. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible. Labor Day: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible. Monday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 73. Chance of precipitation is 60%. Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 85. Tuesday Night: A chance of thunderstorms before 8pm, then a slight chance of showers after 2am. Partly cloudy, with a low around 74. Chance of precipitation is 30%. Wednesday: A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 20%. Wednesday Night: Mostly clear, with a low around 73. Thursday: Sunny, with a high near 89. Thursday Night: Mostly clear, with a low around 75. Friday: Sunny, with a high near 92.

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

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