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.

Thunderstorm in Vicinity

84°F

29°C

Humidity 79%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 13 Jul 5:35 pm EDT
Extended Forecast for

Johns Island SC

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Heat index values as high as 102. Southeast wind around 6 mph.

    High: 92 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. Light southeast wind.

    Low: 76 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 102. Calm wind becoming east 5 to 8 mph in the afternoon.

    High: 91 °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.

    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 70%.

    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

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 92. Heat index values as high as 102. Southeast wind around 6 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76. Light southeast wind.
Monday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91. Heat index values as high as 102. Calm wind becoming east 5 to 8 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.
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 70%.
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. Partly sunny, with a high near 91.
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 93.
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 93.
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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:
1:43 pm EDT Jul 13, 2025
Forecast Valid:
5pm EDT Jul 13, 2025-6pm EDT Jul 20, 2025
 
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Additional Resources

Radar & Satellite Image

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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