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

Charleston Executive Airport (KJZI)

Lat: 32.7°NLon: 80°WElev: 16ft.

Fair

28°C

82°F

Humidity 89%
Wind Speed SW 6 km/h
Barometer 30.15 in
Dewpoint 26°C (79°F)
Visibility 16 km
Heat Index33°C (91°F)
Last update 18 Jul 9:55 pm EDT
Extended Forecast for

Johns Island SC

  • Tonight

    Tonight: Mostly clear, with a low around 26. Southwest wind around 11 km/h.

    Low: 26 °C

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 36. Heat index values as high as 43. Southwest wind 10 to 16 km/h.

    High: 36 °C

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27. Southwest wind 13 to 16 km/h.

    Low: 27 °C

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 36. Heat index values as high as 43. West wind 11 to 18 km/h, with gusts as high as 32 km/h.

    High: 36 °C

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 27. Southwest wind 10 to 14 km/h.

    Low: 27 °C

    Slight Chance
    T-storms

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 36.

    High: 36 °C

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 25.

    Low: 25 °C

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 32. Chance of precipitation is 70%.

    High: 32 °C

    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.

    Low: 25 °C

    T-storms
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 26. Southwest wind around 11 km/h.
Saturday
Sunny, with a high near 36. Heat index values as high as 43. Southwest wind 10 to 16 km/h.
Saturday Night
Mostly clear, with a low around 27. Southwest wind 13 to 16 km/h.
Sunday
Sunny, with a high near 36. Heat index values as high as 43. West wind 11 to 18 km/h, with gusts as high as 32 km/h.
Sunday Night
A 20 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 27. Southwest wind 10 to 14 km/h.
Monday
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 36.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 25.
Tuesday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 32. Chance of precipitation is 70%.
Tuesday Night
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 25. Chance of precipitation is 60%.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 31.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 25.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 32.
Thursday Night
Partly cloudy, with a low around 25.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 33.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Johns Island SC
 32.73°N 80.07°W (Elev. 23 m)
Last Update:
8:32 pm EDT Jul 18, 2025
Forecast Valid:
10pm EDT Jul 18, 2025-6pm EDT Jul 25, 2025
 
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