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.

Overcast

44°F

7°C

Humidity 52%
Wind Speed NW 8 mph
Barometer 29.63 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 24 Feb 10:55 pm CST
Extended Forecast for

Chapin IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 29. North northwest wind 6 to 9 mph, with gusts as high as 17 mph.

    Low: 29 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. Northwest wind 3 to 6 mph.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before midnight, then a chance of snow between midnight and 3am. Mostly cloudy, with a low around 28. Northeast wind 3 to 7 mph. Chance of precipitation is 50%.

    Low: 28 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 50. East northeast wind 5 to 7 mph becoming west southwest in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 32. South southwest wind 3 to 6 mph.

    Low: 32 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 66. Southwest wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 66 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 36. Southwest wind 7 to 9 mph becoming northeast after midnight. Winds could gust as high as 17 mph.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 29. North northwest wind 6 to 9 mph, with gusts as high as 17 mph.
Wednesday
Mostly sunny, with a high near 47. Northwest wind 3 to 6 mph.
Wednesday Night
A chance of rain and snow before midnight, then a chance of snow between midnight and 3am. Mostly cloudy, with a low around 28. Northeast wind 3 to 7 mph. Chance of precipitation is 50%.
Thursday
Mostly sunny, with a high near 50. East northeast wind 5 to 7 mph becoming west southwest in the afternoon.
Thursday Night
Clear, with a low around 32. South southwest wind 3 to 6 mph.
Friday
Sunny, with a high near 66. Southwest wind 7 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly clear, with a low around 36. Southwest wind 7 to 9 mph becoming northeast after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 37.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 24.
Monday
Mostly cloudy, with a high near 36.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 25.
Tuesday
A chance of rain. Mostly cloudy, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chapin IL
 39.77°N 90.41°W (Elev. 627 ft)
Last Update:
10:42 pm CST Feb 24, 2026
Forecast Valid:
11pm CST Feb 24, 2026-6pm CST Mar 3, 2026
 
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