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

73°F

23°C

Humidity 100%
Wind Speed Calm
Barometer 30.01 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 3 Sep 4:35 am EDT
Extended Forecast for

Summerville SC

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 103. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 90 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. South wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94. Light west wind.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%.

    High: 89 °F

    Chance
    Showers then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 72. Chance of precipitation is 80%.

    Low: 72 °F

    T-storms then
    Chance
    T-storms

  • Labor Day

    Labor Day: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    T-storms

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Heat index values as high as 103. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.
Friday
A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 75. South wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 94. Light west wind.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 74.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 89. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Low around 72. Chance of precipitation is 80%.
Labor Day
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 71.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
Summerville SC
 32.99°N 80.17°W (Elev. 75 ft)
Last Update:
2:35 am EDT Sep 3, 2026
Forecast Valid:
4am EDT Sep 3, 2026-6pm EDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation