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

81°F

27°C

Humidity 79%
Wind Speed SW 13 G 21 mph
Barometer 30.09 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 19 Jun 3:35 am EDT
Extended Forecast for

Johns Island SC

  • Overnight

    Overnight: Mostly clear, with a low around 78. Southwest wind around 8 mph.

    Low: 78 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 90. Heat index values as high as 102. Southwest wind 9 to 13 mph.

    High: 90 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 76. Southwest wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 76 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. West wind 5 to 9 mph.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. South wind 3 to 7 mph.

    Low: 75 °F

    Chance
    T-storms then
    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 11am. Sunny, with a high near 89. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 76.

    Low: 76 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 78. Southwest wind around 8 mph.
Juneteenth
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 90. Heat index values as high as 102. Southwest wind 9 to 13 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 76. Southwest wind 8 to 13 mph, with gusts as high as 21 mph.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. West wind 5 to 9 mph.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 75. South wind 3 to 7 mph.
Saturday
A slight chance of showers, with thunderstorms also possible after 11am. Sunny, with a high near 89. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny, with a high near 90.
Sunday Night
Clear, with a low around 76.
Monday
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 91.
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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 ft)
Last Update:
3:05 am EDT Jun 19, 2025
Forecast Valid:
3am EDT Jun 19, 2025-6pm EDT Jun 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