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

79°F

26°C

Humidity 94%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 13 Jul 11:35 pm EDT
Extended Forecast for

3 Miles SSW Johns Island SC

  • Tonight

    Tonight: Partly cloudy, with a low around 76. Calm wind.

    Low: 76 °F

    Partly Cloudy

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 90 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 77. East wind around 6 mph becoming calm in the evening.

    Low: 77 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Light east wind becoming southeast 5 to 10 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 78. South wind 6 to 8 mph.

    Low: 78 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 79.

    Low: 79 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. Calm wind.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 90. Heat index values as high as 102. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 77. East wind around 6 mph becoming calm in the evening.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89. Light east wind becoming southeast 5 to 10 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 78. South wind 6 to 8 mph.
Wednesday
A chance of showers and thunderstorms before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 79.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 79.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 79.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 92.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Johns Island SC
 32.69°N 80.1°W (Elev. 7 ft)
Last Update:
7:06 pm EDT Jul 13, 2025
Forecast Valid:
11pm EDT Jul 13, 2025-6pm EDT Jul 20, 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