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.

Mostly Cloudy

86°F

30°C

Humidity 84%
Wind Speed Calm
Barometer 30.06 in
Dewpoint 81°F (27°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 15 Jul 12:35 pm EDT
Extended Forecast for

Harleyville SC

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 91. Heat index values as high as 103. Southeast wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming south 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. South wind 3 to 7 mph.

    High: 94 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.

    High: 96 °F

    Sunny then
    Chance
    T-storms

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 91. Heat index values as high as 103. Southeast wind around 6 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 102. Calm wind becoming south 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly clear, with a low around 75. South wind around 6 mph becoming calm in the evening.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94. South wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 75.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75.
Saturday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Monday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Harleyville SC
 33.22°N 80.44°W (Elev. 85 ft)
Last Update:
7:08 am EDT Jul 15, 2025
Forecast Valid:
12pm EDT Jul 15, 2025-6pm EDT Jul 21, 2025
 
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