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

72°F

22°C

Humidity 73%
Wind Speed Calm
Barometer 29.94 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 7 Oct 6:55 pm EDT
Extended Forecast for

Harleyville SC

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. Calm wind.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 85. Calm wind.

    High: 85 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 79. Northeast wind 5 to 8 mph.

    High: 79 °F

    Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers after 2am. Cloudy, with a low around 65. Northeast wind 5 to 8 mph.

    Low: 65 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before noon, then showers likely between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 79. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 68. Chance of precipitation is 100%.

    Low: 68 °F

    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.

    High: 84 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely before 8pm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. Calm wind.
Thursday
Increasing clouds, with a high near 85. Calm wind.
Thursday Night
Mostly cloudy, with a low around 60. Calm wind.
Friday
Cloudy, with a high near 79. Northeast wind 5 to 8 mph.
Friday Night
A 20 percent chance of showers after 2am. Cloudy, with a low around 65. Northeast wind 5 to 8 mph.
Saturday
Showers likely and possibly a thunderstorm before noon, then showers likely between noon and 1pm, then showers likely and possibly a thunderstorm after 1pm. Cloudy, with a high near 79. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 68. Chance of precipitation is 100%.
Sunday
Showers and possibly a thunderstorm. High near 84. Chance of precipitation is 80%.
Sunday Night
Showers likely before 8pm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Columbus Day
Mostly sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 59.
Wednesday
Sunny, with a high near 79.
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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:
2:45 pm EDT Oct 7, 2026
Forecast Valid:
6pm EDT Oct 7, 2026-6pm EDT Oct 14, 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