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.

Mostly Cloudy

88°F

31°C

Humidity 66%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 12 Aug 12:35 pm EDT
Extended Forecast for

Dorchester SC

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 97. Heat index values as high as 107. West wind 3 to 5 mph.

    High: 97 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 98. Heat index values as high as 109. Calm wind becoming west around 5 mph.

    High: 98 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 78. Calm wind.

    Low: 78 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.

    High: 99 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 97. Heat index values as high as 107. West wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 76. Calm wind.
Thursday
Sunny, with a high near 98. Heat index values as high as 109. Calm wind becoming west around 5 mph.
Thursday Night
Partly cloudy, with a low around 78. Calm wind.
Friday
Mostly sunny and hot, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 79.
Saturday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 99.
Saturday Night
A 40 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.
Sunday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95.
Sunday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 77.
Monday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 99.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 77.
Tuesday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Dorchester SC
 33.15°N 80.39°W (Elev. 98 ft)
Last Update:
9:22 am EDT Aug 12, 2026
Forecast Valid:
12pm EDT Aug 12, 2026-6pm EDT Aug 18, 2026
 
Forecast Discussion
 
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Additional Resources

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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