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

85°F

29°C

Humidity 63%
Wind Speed S 10 mph
Barometer 30.05 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 8 Aug 11:10 am CDT
Extended Forecast for

Jacksonville IL

  • Today

    Today: Sunny, with a high near 91. Heat index values as high as 100. South wind 11 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. Heat index values as high as 100. South wind 10 to 13 mph, with gusts as high as 21 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. Partly sunny, with a high near 88. South southwest 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 11 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. Heat index values as high as 100. South wind 10 to 13 mph, with gusts as high as 21 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. Partly sunny, with a high near 88. South southwest 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 86.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Jacksonville IL
 39.73°N 90.24°W (Elev. 607 ft)
Last Update:
10:40 am CDT Aug 8, 2025
Forecast Valid:
11am CDT Aug 8, 2025-6pm CDT Aug 14, 2025
 
Forecast Discussion
 
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Additional Resources

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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