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Hazardous Weather Conditions

Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Partly Cloudy

86°F

30°C

Humidity 66%
Wind Speed Vrbl 5 mph
Barometer 30.09 in
Dewpoint 73°F (23°C)
Visibility 9.00 mi
Heat Index93°F (34°C)
Last update 24 Jul 9:35 am EDT
Extended Forecast for

4 Miles SSW Harleyville SC

Flood Watch July 24, 12:00pm until July 25, 12:00am
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Showers and thunderstorms, mainly after 3pm. Some of the storms could produce heavy rainfall. High near 93. Heat index values as high as 105. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 93 °F

    Partly Sunny
    then Heavy
    Rain

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 73 °F

    Heavy Rain
    then Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming west around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 5am, then a chance of showers. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    T-storms
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly sunny, with a high near 91. Light north wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly clear, with a low around 72. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    T-storms
    Likely then
    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

  • Monday Night

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

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 97.

    High: 97 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms, mainly after 3pm. Some of the storms could produce heavy rainfall. High near 93. Heat index values as high as 105. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms likely, mainly before midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Calm wind becoming west around 5 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely before 5am, then a chance of showers. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. Mostly sunny, with a high near 91. Light north wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly clear, with a low around 72. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Mostly sunny, with a high near 97.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 2am. Mostly clear, with a low around 76.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Harleyville SC
 33.16°N 80.47°W (Elev. 85 ft)
Last Update:
8:32 am EDT Jul 24, 2026
Forecast Valid:
9am EDT Jul 24, 2026-6pm EDT Jul 30, 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