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.

Thunderstorm in Vicinity

86°F

30°C

Humidity 66%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 21 Aug 7:35 pm EDT
Extended Forecast for

4 Miles S Summerville Airport SC

  • Tonight

    Tonight: A chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 74. South wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 93. Heat index values as high as 103. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 93 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 73. Calm wind. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 95. Calm wind becoming west around 6 mph in the afternoon.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 72. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 50%.

    High: 94 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 4am, then a slight chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 74. South wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 93. Heat index values as high as 103. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 73. Calm wind. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 95. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 71. Calm wind.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95.
Monday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Tuesday
A slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 50%.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 72.
Wednesday
A 50 percent chance of showers and thunderstorms, mainly after 8am. Mostly sunny, with a high near 93.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Thursday
Showers and thunderstorms likely. Mostly sunny, with a high near 93. Chance of precipitation is 70%.
Thursday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 73. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Summerville Airport SC
 33°N 80.28°W (Elev. 26 ft)
Last Update:
7:32 pm EDT Aug 21, 2026
Forecast Valid:
7pm EDT Aug 21, 2026-6pm EDT Aug 28, 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