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CHARLESTON 7 Day Forecast

NWS Forecast for: Charleston SC Issued by: National Weather Service Charleston, SC Last Update: 2:50 am EDT Sep 11, 2026

Today High: 90 °F Chance T-storms Tonight Low: 76 °F Slight Chance T-storms Saturday High: 89 °F Slight Chance T-storms then Chance T-storms 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 Monday High: 91 °F Sunny then Chance T-storms Monday Night Low: 76 °F Chance T-storms then Mostly Clear Tuesday High: 87 °F Slight Chance Showers then Slight Chance T-storms

Today: A 30 percent chance of showers and thunderstorms, mainly between noon and 4pm. 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. Tonight: A slight chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 76. Southwest wind 3 to 6 mph. Chance of precipitation is 20%. Saturday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 89. Heat index values as high as 102. Calm wind becoming south 5 to 9 mph in the afternoon. New rainfall amounts of less than a tenth 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. South wind 3 to 7 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. Sunday: A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Southwest wind 3 to 8 mph. Chance of precipitation is 40%. Sunday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Tuesday: A slight chance of showers, with thunderstorms also possible after 2pm. Sunny, with a high near 87. Chance of precipitation is 20%. Tuesday Night: Mostly clear, with a low around 73. Wednesday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 86. Wednesday Night: Mostly clear, with a low around 73. Thursday: A 20 percent chance of showers and thunderstorms. Sunny, with a high near 86.

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

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