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

Hazardous Weather Conditions

Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Thunderstorm in Vicinity Rain Fog/Mist

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 75°F (24°C)
Visibility 1.50 mi
Last update 13 Aug 7:35 pm EDT
Extended Forecast for

Summerville SC

Extreme Heat Warning August 13, 07:41pm until August 14, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 13, 07:41pm until August 14, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 77 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 97. Heat index values as high as 112. Calm wind becoming west around 5 mph in the afternoon.

    High: 97 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Southwest wind 3 to 5 mph.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98. Heat index values as high as 114. Southwest wind 3 to 5 mph.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Light south wind.

    Low: 77 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 97.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 78.

    Low: 78 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 100.

    High: 100 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 77. Southeast wind around 6 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 97. Heat index values as high as 112. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 77. Southwest wind 3 to 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98. Heat index values as high as 114. Southwest wind 3 to 5 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Light south wind.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 97.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 78.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 100.
Monday Night
Mostly clear, with a low around 79.
Tuesday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 78.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Summerville SC
 33.01°N 80.17°W (Elev. 49 ft)
Last Update:
2:45 pm EDT Aug 13, 2026
Forecast Valid:
7pm EDT Aug 13, 2026-6pm EDT Aug 20, 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