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

82°F

28°C

Humidity 58%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 14 Oct 6:15 pm EDT
Extended Forecast for

Harleyville SC

  • Tonight

    Tonight: Clear, with a low around 61. Light south wind.

    Low: 61 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Calm wind.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Light south wind.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 87 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. Southwest wind 5 to 9 mph becoming west after midnight.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers before 2pm. Mostly sunny, with a high near 70.

    High: 70 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers between 8pm and 2am. Mostly clear, with a low around 47. Chance of precipitation is 20%.

    Low: 47 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 61. Light south wind.
Thursday
Sunny, with a high near 90. Calm wind.
Thursday Night
Mostly clear, with a low around 62. Light south wind.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 87. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 61. Southwest wind 5 to 9 mph becoming west after midnight.
Saturday
A 20 percent chance of showers before 2pm. Mostly sunny, with a high near 70.
Saturday Night
A slight chance of showers between 8pm and 2am. Mostly clear, with a low around 47. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 50.
Monday
Mostly sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Harleyville SC
 33.22°N 80.44°W (Elev. 85 ft)
Last Update:
2:35 pm EDT Oct 14, 2026
Forecast Valid:
6pm EDT Oct 14, 2026-6pm EDT Oct 21, 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