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.

A Few Clouds

86°F

30°C

Humidity 70%
Wind Speed Vrbl 6 mph
Barometer 30.10 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 27 Jun 11:35 am EDT
Extended Forecast for

4 Miles WSW Harleyville SC

  • Today

    Today: Sunny, with a high near 95. Heat index values as high as 102. Southwest wind around 6 mph.

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. Light south wind.

    Low: 75 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of thunderstorms, mainly after 5pm. Sunny, with a high near 96. Heat index values as high as 105. West wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 75. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 96. Light and variable wind.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74.

    Low: 74 °F

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 95. Heat index values as high as 102. Southwest wind around 6 mph.
Tonight
Partly cloudy, with a low around 75. Light south wind.
Sunday
A chance of thunderstorms, mainly after 5pm. Sunny, with a high near 96. Heat index values as high as 105. West wind 3 to 7 mph. Chance of precipitation is 30%.
Sunday Night
A 50 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 75. Calm wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A 40 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 96. Light and variable wind.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74.
Tuesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 94.
Thursday Night
Mostly clear, with a low around 74.
Friday
Sunny, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Harleyville SC
 33.2°N 80.5°W (Elev. 79 ft)
Last Update:
8:32 am EDT Jun 27, 2026
Forecast Valid:
11am EDT Jun 27, 2026-6pm EDT Jul 3, 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