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

75°F

24°C

Humidity 89%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 22 Jun 12:35 am EDT
Extended Forecast for

Johns Island SC

  • Overnight

    Overnight: Partly cloudy, with a low around 74. Southwest wind 3 to 5 mph.

    Low: 74 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Heat index values as high as 104. West wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 79. Southwest wind 8 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 105. West wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Southwest wind 5 to 9 mph.

    Low: 76 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

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

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 75. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 89. Chance of precipitation is 30%.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.

    Low: 75 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 74. Southwest wind 3 to 5 mph.
Monday
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Heat index values as high as 104. West wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 79. Southwest wind 8 to 10 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 105. West wind 10 to 13 mph, with gusts as high as 21 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Southwest wind 5 to 9 mph.
Wednesday
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 75. Chance of precipitation is 30%.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Friday
A slight chance of thunderstorms before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 30%.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 77.
Sunday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95.
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ABOUT THIS FORECAST

 
Point Forecast:
Johns Island SC
 32.71°N 80.1°W (Elev. 3 ft)
Last Update:
8:32 pm EDT Jun 21, 2026
Forecast Valid:
12am EDT Jun 22, 2026-6pm EDT Jun 28, 2026
 
Forecast Discussion
 
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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