National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Extreme Heat and Excessive Rainfall This Week

A significant heat wave is underway for the Intermountain West, Northern Plains, and Upper Great Lakes, peaking in intensity through midweek and lingering across parts of the Northern Plains and Midwest until this weekend. In southwest Texas, excessive rainfall may bring a risk for potentially life-threatening flash and arroyo flooding through Thursday. Read More >

Hazardous Weather Conditions

Current conditions at

Joliet Regional Airport (KJOT)

Lat: 41.52°NLon: 88.18°WElev: 572ft.

Fair

88°F

31°C

Humidity 58%
Wind Speed Calm
Barometer 30.20 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 14 Jul 10:55 am CDT
Extended Forecast for

Wilmington IL

  • Today

    Today: Sunny, with a high near 92. Heat index values as high as 99. Southwest wind around 5 mph.

    High: 92 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 71. Southwest wind around 5 mph.

    Low: 71 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 102. West wind around 5 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72. West southwest wind around 5 mph.

    Low: 72 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.

    High: 93 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 60%.

    High: 90 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 92. Heat index values as high as 99. Southwest wind around 5 mph.
Tonight
Clear, with a low around 71. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 102. West wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 72. West southwest wind around 5 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Calm wind becoming west southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 72.
Friday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 72.
Saturday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Saturday Night
A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 87.
Sunday Night
Mostly clear, with a low around 67.
Monday
Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wilmington IL
 41.31°N 88.15°W
Last Update:
11:11 am CDT Jul 14, 2026
Forecast Valid:
11am CDT Jul 14, 2026-6pm CDT Jul 20, 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