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

75°F

24°C

Humidity 100%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Last update 4 Sep 5:15 am EDT
Extended Forecast for

4 Miles SSW Summerville SC

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 103. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 91 °F

    Sunny 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. Heat index values as high as 107. Light southwest wind.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind around 6 mph becoming calm after midnight.

    Low: 75 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 92 °F

    Mostly Sunny
    then T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 70%.

    Low: 73 °F

    T-storms
    Likely

  • Labor Day

    Labor Day: A 50 percent chance of showers and thunderstorms, mainly after 8am. Partly sunny, with a high near 85.

    High: 85 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 76. Calm wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 91. Heat index values as high as 103. Calm wind becoming south 5 to 7 mph in the afternoon.
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. Heat index values as high as 107. Light southwest wind.
Saturday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. South wind around 6 mph becoming calm after midnight.
Sunday
Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and thunderstorms likely, mainly before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 70%.
Labor Day
A 50 percent chance of showers and thunderstorms, mainly after 8am. Partly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Summerville SC
 32.95°N 80.2°W (Elev. 30 ft)
Last Update:
2:30 am EDT Sep 4, 2026
Forecast Valid:
5am EDT Sep 4, 2026-6pm EDT Sep 10, 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