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 94%
Wind Speed Calm
Barometer 29.98 in
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 11 Sep 2:35 am EDT
Extended Forecast for

3 Miles WNW Johns Island SC

  • Overnight

    Overnight: Mostly cloudy, with a low around 77. Light southwest wind.

    Low: 77 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Southwest wind 3 to 7 mph.

    High: 90 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 76. South wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Calm wind becoming south 5 to 8 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 77. Light southwest wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 1pm and 4pm. Mostly sunny, with a high near 90. Heat index values as high as 103. Southwest wind 3 to 7 mph.
Friday Night
A slight chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 76. South wind 3 to 6 mph. Chance of precipitation is 20%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Calm wind becoming south 5 to 8 mph in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
Sunday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Monday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76.
Tuesday
A slight chance of showers, with thunderstorms also possible after 2pm. Sunny, with a high near 87. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 73.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Johns Island SC
 32.74°N 80.12°W (Elev. 10 ft)
Last Update:
2:50 am EDT Sep 11, 2026
Forecast Valid:
2am EDT Sep 11, 2026-6pm EDT Sep 17, 2026
 
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