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.

Fair

79°F

26°C

Humidity 100%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 23 Jul 10:35 pm EDT
Extended Forecast for

4 Miles WNW Harleyville SC

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 74. Light east wind.

    Low: 74 °F

    Mostly Clear
    then Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly between 2pm and 4pm. Partly sunny, with a high near 90. Heat index values as high as 102. Light and variable wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95. Heat index values as high as 109. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Light south wind.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

  • Sunday

    Sunday: 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

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Partly cloudy, with a low around 74. Light east wind.
Thursday
Showers and thunderstorms likely, mainly between 2pm and 4pm. Partly sunny, with a high near 90. Heat index values as high as 102. Light and variable wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 74. Calm wind.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 95. Heat index values as high as 109. Calm wind becoming southwest around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 75. Light south wind.
Saturday
Sunny, with a high near 98.
Saturday Night
Mostly clear, with a low around 78.
Sunday
A 20 percent chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 100.
Sunday Night
Mostly clear, with a low around 78.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 98.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 75.
Wednesday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Harleyville SC
 33.23°N 80.52°W (Elev. 89 ft)
Last Update:
9:40 pm EDT Jul 23, 2025
Forecast Valid:
10pm EDT Jul 23, 2025-6pm EDT Jul 30, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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