National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat Wave Continues; Areas of Severe Thunderstorms Today

Dangerous, record-breaking heat will continue across most of the central and eastern U.S through Friday then focusing on the eastern U.S. through the Independence Day weekend. Peak heat indices of up to 115 degrees are possible. Strong to severe thunderstorms will be possible from the northern Plains into the Midwest and Great Lakes regions, as well as across the southern Appalachians today. Read More >

Current conditions at

Summerville Airport (KDYB)

Lat: 33.06°NLon: 80.28°WElev: 56ft.

Partly Cloudy

95°F

35°C

Humidity 44%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index101°F (38°C)
Last update 2 Jul 4:35 pm EDT
Extended Forecast for

5 Miles WNW Harleyville SC

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, clear, with a low around 70. Southeast wind 5 to 9 mph becoming calm in the evening.

    Low: 70 °F

    Clear then
    Patchy Fog

  • Friday

    Friday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 99. Calm wind becoming east around 5 mph in the afternoon.

    High: 99 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. Southeast wind around 6 mph becoming calm in the evening.

    Low: 72 °F

    Mostly Clear

  • Independence Day

    Independence Day: Sunny and hot, with a high near 100. Light and variable wind.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. South wind 5 to 8 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 100.

    High: 100 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 5am. Otherwise, clear, with a low around 70. Southeast wind 5 to 9 mph becoming calm in the evening.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 99. Calm wind becoming east around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 72. Southeast wind around 6 mph becoming calm in the evening.
Independence Day
Sunny and hot, with a high near 100. Light and variable wind.
Saturday Night
Mostly clear, with a low around 74. South wind 5 to 8 mph becoming calm in the evening.
Sunday
Sunny and hot, with a high near 100.
Sunday Night
Mostly clear, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.
Monday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.
Tuesday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 98.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Wednesday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Harleyville SC
 33.25°N 80.52°W (Elev. 85 ft)
Last Update:
2:30 pm EDT Jul 2, 2026
Forecast Valid:
4pm EDT Jul 2, 2026-6pm EDT Jul 9, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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