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.

Mostly Cloudy

78°F

26°C

Humidity 81%
Wind Speed N 3 mph
Barometer 29.90 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 27 Jun 3:15 pm CDT
Extended Forecast for

Chapin IL

Heat Advisory June 28, 01:00pm until June 28, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 81. Light northeast wind.

    High: 81 °F

    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 71. Northeast wind around 5 mph becoming light and variable.

    Low: 71 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 103. South southeast wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 91 °F

    Slight Chance
    T-storms then
    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 74. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 74 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 92. South wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 92 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind 9 to 11 mph, with gusts as high as 18 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 93. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 93 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 81. Light northeast wind.
Tonight
A 40 percent chance of showers and thunderstorms, mainly after midnight. Mostly cloudy, with a low around 71. Northeast wind around 5 mph becoming light and variable.
Sunday
A 20 percent chance of showers and thunderstorms before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 103. South southeast wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday Night
Increasing clouds, with a low around 74. South wind 8 to 11 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 92. South wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 75. South wind 9 to 11 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 93. South southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Tuesday Night
Clear, with a low around 75.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
Sunny, with a high near 92.
Thursday Night
Mostly clear, with a low around 74.
Friday
Sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chapin IL
 39.78°N 90.44°W (Elev. 630 ft)
Last Update:
1:26 pm CDT Jun 27, 2026
Forecast Valid:
3pm CDT Jun 27, 2026-6pm CDT Jul 3, 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