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

87°F

31°C

Humidity 58%
Wind Speed S 8 mph
Barometer 29.94 in
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 31 Aug 7:35 pm CDT
Extended Forecast for

4 Miles ESE Chapin IL

Heat Advisory until September 3, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until September 3, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Tonight

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Heat index values as high as 104. West southwest wind 6 to 8 mph, with gusts as high as 16 mph.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 77. South wind 3 to 7 mph. Winds could gust as high as 15 mph.

    Low: 77 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 9 mph, with gusts as high as 15 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 78. South wind 3 to 7 mph. Winds could gust as high as 15 mph.

    Low: 78 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 98. Southwest wind 6 to 8 mph.

    High: 98 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. South wind 3 to 6 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 95.

    High: 95 °F

    Hot

Detailed Forecast

Tonight
Mostly clear, with a low around 75. South wind 6 to 8 mph, with gusts as high as 15 mph.
Tuesday
Sunny and hot, with a high near 100. Heat index values as high as 104. West southwest wind 6 to 8 mph, with gusts as high as 16 mph.
Tuesday Night
Clear, with a low around 77. South wind 3 to 7 mph. Winds could gust as high as 15 mph.
Wednesday
Sunny and hot, with a high near 99. Heat index values as high as 104. Southwest wind 6 to 9 mph, with gusts as high as 15 mph.
Wednesday Night
Clear, with a low around 78. South wind 3 to 7 mph. Winds could gust as high as 15 mph.
Thursday
Sunny and hot, with a high near 98. Southwest wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 76. South wind 3 to 6 mph.
Friday
Sunny and hot, with a high near 95.
Friday Night
Mostly clear, with a low around 74.
Saturday
Mostly sunny, with a high near 94.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 67.
Labor Day
Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ESE Chapin IL
 39.75°N 90.32°W (Elev. 607 ft)
Last Update:
7:36 pm CDT Aug 31, 2026
Forecast Valid:
7pm CDT Aug 31, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation