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

Hazardous Weather Conditions

Current conditions at

Jacksonville Municipal Airport (KIJX)

Lat: 39.77°NLon: 90.24°WElev: 614ft.

Fair

82°F

28°C

Humidity 73%
Wind Speed E 3 mph
Barometer 29.96 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 21 Jul 6:50 pm CDT
Extended Forecast for

Jacksonville IL

Extreme Heat Watch July 22, 12:00pm until July 24, 07:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 1am and 4am. Mostly cloudy, with a low around 72. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 90. Heat index values as high as 105. South southeast wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 90 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 75. Southeast wind around 7 mph.

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 105. South southwest wind around 7 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South wind around 6 mph.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 93. South southwest wind around 7 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 1am and 4am. Mostly cloudy, with a low around 72. Southeast wind 3 to 5 mph. Chance of precipitation is 20%.
Tuesday
Isolated showers and thunderstorms after 4pm. Mostly sunny, with a high near 90. Heat index values as high as 105. South southeast wind 6 to 8 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 75. Southeast wind around 7 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 105. South southwest wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 75. South wind around 6 mph.
Thursday
Sunny, with a high near 93. South southwest wind around 7 mph.
Thursday Night
Partly cloudy, with a low around 72. South wind around 6 mph.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Friday Night
Partly cloudy, with a low around 72.
Saturday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 73.
Monday
Sunny, with a high near 91.
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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:
6:41 pm CDT Jul 21, 2025
Forecast Valid:
7pm CDT Jul 21, 2025-6pm CDT Jul 28, 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