National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Jacksonville Municipal Airport (KIJX)

Lat: 39.77°NLon: 90.24°WElev: 614ft.

Fair

76°F

24°C

Humidity 92%
Wind Speed S 7 mph
Barometer 30.04 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 8 Aug 7:30 am CDT
Extended Forecast for

South Jacksonville IL

  • Today

    Today: Sunny, with a high near 91. Heat index values as high as 100. South wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South southeast wind around 11 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91. South wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South southeast wind around 10 mph, with gusts as high as 17 mph.

    Low: 73 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. South wind around 9 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 72. South southeast wind around 6 mph.

    Low: 72 °F

    Partly Cloudy
    then Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind around 7 mph.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 50 percent chance of showers. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 91. Heat index values as high as 100. South wind 9 to 13 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 75. South southeast wind around 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 91. South wind 10 to 13 mph, with gusts as high as 22 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 73. South southeast wind around 10 mph, with gusts as high as 17 mph.
Sunday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. South wind around 9 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Sunday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 72. South southeast wind around 6 mph.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind around 7 mph.
Monday Night
A 50 percent chance of showers. Partly cloudy, with a low around 70.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87.
Tuesday Night
Partly cloudy, with a low around 70.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Jacksonville IL
 39.7°N 90.24°W (Elev. 650 ft)
Last Update:
7:40 am CDT Aug 8, 2025
Forecast Valid:
8am CDT Aug 8, 2025-6pm CDT Aug 14, 2025
 
Forecast Discussion
 
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Additional Resources

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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