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

60°F

16°C

Humidity 70%
Wind Speed S 12 G 16 mph
Barometer 29.91 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 15 May 9:15 am CDT
Extended Forecast for

Chapin IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 13 to 16 mph, with gusts as high as 26 mph.

    High: 81 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South southeast wind around 11 mph, with gusts as high as 23 mph.

    Low: 63 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 11am. Partly sunny, with a high near 82. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 62. South wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 88. Breezy, with a south wind 13 to 20 mph, with gusts as high as 28 mph.

    High: 88 °F

    Sunny then
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. South wind 15 to 17 mph, with gusts as high as 28 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Breezy, with a south wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Breezy.
    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Breezy. Chance of precipitation is 70%.

    High: 85 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 81. South wind 13 to 16 mph, with gusts as high as 26 mph.
Tonight
A 30 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 63. South southeast wind around 11 mph, with gusts as high as 23 mph.
Saturday
Showers and thunderstorms likely, mainly before 11am. Partly sunny, with a high near 82. South southwest wind 8 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 62. South wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 88. Breezy, with a south wind 13 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Mostly clear, with a low around 68. South wind 15 to 17 mph, with gusts as high as 28 mph.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. Breezy, with a south wind 16 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Breezy. Chance of precipitation is 70%.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Wednesday
Partly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
Partly sunny, with a high near 73.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chapin IL
 39.77°N 90.41°W (Elev. 627 ft)
Last Update:
9:07 am CDT May 15, 2026
Forecast Valid:
9am CDT May 15, 2026-6pm CDT May 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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