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

82°F

28°C

Humidity 100%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 82°F (28°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 30 Jul 10:35 pm EDT
Extended Forecast for

3 Miles SSW Summerville SC

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 78. Calm wind.

    Low: 78 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 97. Heat index values as high as 110. Calm wind becoming west around 6 mph in the morning.

    High: 97 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 78. Southwest wind 3 to 6 mph.

    Low: 78 °F

    Heavy Rain

  • Friday

    Friday: Showers and thunderstorms likely after 2pm. Increasing clouds, with a high near 96. Heat index values as high as 109. West wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 96 °F

    Sunny then
    T-storms
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 75 °F

    T-storms
    Likely then
    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 85. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 85 °F

    Chance
    T-storms then
    T-storms

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 83. Chance of precipitation is 80%.

    High: 83 °F

    Showers
    Likely then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.

    Low: 71 °F

    T-storms then
    Showers
    Likely

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 78. Calm wind.
Thursday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 97. Heat index values as high as 110. Calm wind becoming west around 6 mph in the morning.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 78. Southwest wind 3 to 6 mph.
Friday
Showers and thunderstorms likely after 2pm. Increasing clouds, with a high near 96. Heat index values as high as 109. West wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 75. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 85. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.
Sunday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 83. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm, mainly before 2am, then a chance of showers and thunderstorms after 2am. Low around 71. Chance of precipitation is 80%.
Monday
Showers and thunderstorms likely, mainly after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 89. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 74. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Partly sunny, with a high near 90. Chance of precipitation is 60%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Summerville SC
 32.97°N 80.2°W (Elev. 39 ft)
Last Update:
9:48 pm EDT Jul 30, 2025
Forecast Valid:
10pm EDT Jul 30, 2025-6pm EDT Aug 6, 2025
 
Forecast Discussion
 
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Additional Resources

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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