Current conditions at

Jacksonville Municipal Airport (KIJX)

Lat: 39.77°NLon: 90.24°WElev: 614ft.

Mostly Cloudy

92°F

33°C

Humidity 77%
Wind Speed W 5 mph
Barometer 29.91 in
Dewpoint 83°F (28°C)
Visibility 10.00 mi
Heat Index118°F (48°C)
Last update 26 Jul 12:55 pm CDT
Extended Forecast for

Chapin IL

Extreme Heat Warning until July 27, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 27, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • This Afternoon

    High: 93 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 76. Calm wind becoming south around 5 mph after midnight.

    Low: 76 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny and hot, with a high near 96. Heat index values as high as 110. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 96 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. Southwest wind around 8 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90. Northwest wind 6 to 9 mph becoming north northeast in the afternoon. Winds could gust as high as 15 mph.

    High: 90 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 68. Northeast wind 3 to 6 mph.

    Low: 68 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. Heat index values as high as 109. West southwest wind around 7 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Calm wind becoming south around 5 mph after midnight.
Monday
Sunny and hot, with a high near 96. Heat index values as high as 110. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 75. Southwest wind around 8 mph becoming west northwest after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly sunny, with a high near 90. Northwest wind 6 to 9 mph becoming north northeast in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Mostly clear, with a low around 68. Northeast wind 3 to 6 mph.
Wednesday
Sunny, with a high near 87. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Wednesday Night
Clear, with a low around 64.
Thursday
Sunny, with a high near 87.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Partly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Chapin IL
 39.78°N 90.44°W (Elev. 630 ft)
12:36 pm CDT Jul 26, 2026
1pm CDT Jul 26, 2026-6pm CDT Aug 1, 2026
 
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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