National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Fair

77°F

25°C

Humidity 83%
Wind Speed Calm
Barometer 29.96 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 12 Aug 8:35 am EDT
Extended Forecast for

Summerville SC

  • Today

    Today: Mostly sunny, with a high near 96. Heat index values as high as 107. West wind 5 to 7 mph.

    High: 96 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 77. Light west wind.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 98. Heat index values as high as 109. West wind 3 to 5 mph.

    High: 98 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 78. Southwest wind 3 to 5 mph.

    Low: 78 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 100. West wind 3 to 6 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.

    High: 98 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77.

    Low: 77 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 96. Heat index values as high as 107. West wind 5 to 7 mph.
Tonight
Partly cloudy, with a low around 77. Light west wind.
Thursday
Sunny, with a high near 98. Heat index values as high as 109. West wind 3 to 5 mph.
Thursday Night
Partly cloudy, with a low around 78. Southwest wind 3 to 5 mph.
Friday
Mostly sunny and hot, with a high near 100. West wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 79.
Saturday
A 50 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.
Saturday Night
A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 78.
Tuesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 97.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Summerville SC
 32.99°N 80.2°W (Elev. 30 ft)
Last Update:
8:32 am EDT Aug 12, 2026
Forecast Valid:
8am EDT Aug 12, 2026-6pm EDT Aug 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation