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.

Partly Cloudy

58°F

14°C

Humidity 99%
Wind Speed SW 8 mph
Barometer 29.80 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 7 Mar 7:55 am CST
Extended Forecast for

Chapin IL

  • Today

    Today: A 20 percent chance of showers before 10am. Cloudy, with a temperature falling to around 47 by 5pm. West northwest wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 61 °F⇓

    Slight Chance
    Showers then
    Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 17 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 64. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 45. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 75. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 77. South wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Chance
    T-storms then
    Showers

  • Tuesday Night

    Tuesday Night: Showers, with thunderstorms also possible after midnight. Low around 46. Breezy. Chance of precipitation is 90%.

    Low: 46 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Cloudy, with a high near 56. Breezy. Chance of precipitation is 70%.

    High: 56 °F

    Breezy.
    Showers
    Likely then
    Chance
    Showers

Detailed Forecast

Today
A 20 percent chance of showers before 10am. Cloudy, with a temperature falling to around 47 by 5pm. West northwest wind 11 to 18 mph, with gusts as high as 28 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West northwest wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 17 mph.
Sunday
Sunny, with a high near 64. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 45. South southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 75. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 56. South southwest wind 8 to 10 mph, with gusts as high as 17 mph.
Tuesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. High near 77. South wind 9 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers, with thunderstorms also possible after midnight. Low around 46. Breezy. Chance of precipitation is 90%.
Wednesday
Showers likely, mainly before noon. Cloudy, with a high near 56. Breezy. Chance of precipitation is 70%.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly cloudy, with a low around 39.
Friday
Mostly cloudy, with a high near 62. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chapin IL
 39.78°N 90.44°W (Elev. 630 ft)
Last Update:
7:57 am CST Mar 7, 2026
Forecast Valid:
8am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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