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.

Partly Cloudy

29°C

84°F

Humidity 79%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 25°C (77°F)
Visibility 16 km
Heat Index34°C (94°F)
Last update 3 Jul 9:55 am EDT
Extended Forecast for

Johns Island SC

  • Today

    Today: Showers and thunderstorms likely, mainly between 2pm and 3pm. Partly sunny, with a high near 32. Heat index values as high as 38. Calm wind becoming south 5 to 10 km/h in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 32 °C

    Chance
    T-storms then
    T-storms
    Likely

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 24. South wind 5 to 8 km/h becoming calm in the evening.

    Low: 24 °C

    Slight Chance
    T-storms then
    Mostly Clear

  • Independence Day

    Independence Day: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. East wind 10 to 15 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 32 km/h.

    High: 32 °C

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 24. East wind 13 to 16 km/h.

    Low: 24 °C

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Partly sunny, with a high near 30. East wind 21 to 26 km/h, with gusts as high as 39 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 cm possible.

    High: 30 °C

    Showers
    Likely then
    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23.

    Low: 23 °C

    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.

    High: 31 °C

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 24.

    Low: 24 °C

    Chance
    T-storms

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32.

    High: 32 °C

    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly between 2pm and 3pm. Partly sunny, with a high near 32. Heat index values as high as 38. Calm wind becoming south 5 to 10 km/h in the afternoon. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 24. South wind 5 to 8 km/h becoming calm in the evening.
Independence Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32. East wind 10 to 15 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 32 km/h.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 24. East wind 13 to 16 km/h.
Saturday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then showers and thunderstorms likely after 2pm. Partly sunny, with a high near 30. East wind 21 to 26 km/h, with gusts as high as 39 km/h. Chance of precipitation is 60%. New rainfall amounts between 1 and 2 cm possible.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 23.
Sunday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 31. Chance of precipitation is 60%.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 24.
Monday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 32.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 25.
Tuesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 33.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 26.
Wednesday
A 40 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:
9:25 am EDT Jul 3, 2025
Forecast Valid:
10am EDT Jul 3, 2025-6pm EDT Jul 9, 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