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

79°F

26°C

Humidity 89%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 1 Sep 10:35 pm EDT
Extended Forecast for

5 Miles WNW Harleyville SC

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 95. Heat index values as high as 103. Light and variable wind.

    High: 95 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 95. Heat index values as high as 102. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 95 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Clear, with a low around 73. South wind around 6 mph becoming calm in the evening.

    Low: 73 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 98.

    High: 98 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 73. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 95. Heat index values as high as 103. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 73. South wind around 5 mph becoming calm in the evening.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 95. Heat index values as high as 102. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 73. South wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 96.
Friday Night
Mostly clear, with a low around 74.
Saturday
A 30 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 98.
Saturday Night
A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 60%.
Sunday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 71. Chance of precipitation is 60%.
Labor Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Harleyville SC
 33.25°N 80.52°W (Elev. 85 ft)
Last Update:
8:32 pm EDT Sep 1, 2026
Forecast Valid:
10pm EDT Sep 1, 2026-6pm EDT Sep 8, 2026
 
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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