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

77°F

25°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in
Dewpoint 77°F (25°C)
Visibility 9.00 mi
Heat Index78°F (26°C)
Last update 19 Aug 5:35 am EDT
Extended Forecast for

4 Miles W Summerville SC

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 99. Heat index values as high as 110. Light and variable wind.

    High: 99 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly clear, with a low around 76. Light southeast wind.

    Low: 76 °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 108. 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 76. South wind around 6 mph becoming calm in the evening.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Showers and thunderstorms likely after 2pm. Sunny, with a high near 97. 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: 97 °F

    Sunny then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 8pm. Partly cloudy, with a low around 74. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 74 °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 73. Chance of precipitation is 60%.

    Low: 73 °F

    T-storms
    Likely

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 2pm. Sunny, with a high near 99. Heat index values as high as 110. Light and variable wind.
Tonight
Mostly clear, with a low around 76. 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 108. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 76. South wind around 6 mph becoming calm in the evening.
Friday
Showers and thunderstorms likely after 2pm. Sunny, with a high near 97. 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 74. 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 73. Chance of precipitation is 60%.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94.
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. Mostly clear, with a low around 74.
Tuesday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 94.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Summerville SC
 33°N 80.25°W (Elev. 52 ft)
Last Update:
5:02 am EDT Aug 19, 2026
Forecast Valid:
5am EDT Aug 19, 2026-6pm EDT Aug 25, 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