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.

Partly Cloudy

95°F

35°C

Humidity 53%
Wind Speed Calm
Barometer 29.92 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 19 Aug 1:15 pm EDT
Extended Forecast for

3 Miles S Summerville SC

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 99. Heat index values as high as 110. Light southwest wind.

    High: 99 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 77. Light southeast wind.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Sunny, with a high near 98. Heat index values as high as 111. Calm wind becoming south around 6 mph in the afternoon.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. South wind around 6 mph becoming calm in the evening.

    Low: 77 °F

    Mostly Clear

  • Friday

    Friday: Showers and thunderstorms likely after 2pm. Sunny, with a high near 96. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 96 °F

    Sunny then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 75 °F

    T-storms
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 70%.

    High: 94 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.

    Low: 74 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 99. Heat index values as high as 110. Light southwest wind.
Tonight
Mostly clear, with a low around 77. Light southeast wind.
Thursday
A 20 percent chance of showers and thunderstorms, mainly between 4pm and 5pm. Sunny, with a high near 98. Heat index values as high as 111. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 77. South wind around 6 mph becoming calm in the evening.
Friday
Showers and thunderstorms likely after 2pm. Sunny, with a high near 96. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 75. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and thunderstorms likely after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 70%.
Saturday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 74.
Monday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 94.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Summerville SC
 32.97°N 80.17°W (Elev. 30 ft)
Last Update:
8:32 am EDT Aug 19, 2026
Forecast Valid:
1pm EDT Aug 19, 2026-6pm EDT Aug 25, 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