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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Winthrop Harbor IL

Heat Advisory June 22, 10:32pm until June 24, 12:00am
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 22, 10:32pm until June 24, 12:00am

    NOW until 12:00am Tue

    Heat Advisory

  • Tonight

    Low: 78 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 95. Heat index values as high as 100. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 95 °F

    Hot and
    Breezy

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 9pm. Increasing clouds, with a low around 69. Breezy, with a west southwest wind 15 to 20 mph becoming west 5 to 10 mph in the evening. Winds could gust as high as 35 mph.

    Low: 69 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 10am. Partly sunny, with a high near 76. West wind 5 to 10 mph becoming east northeast in the afternoon.

    High: 76 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind 5 to 10 mph.

    Low: 65 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 78. South southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Sunny and hot, with a high near 95. Heat index values as high as 100. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 9pm. Increasing clouds, with a low around 69. Breezy, with a west southwest wind 15 to 20 mph becoming west 5 to 10 mph in the evening. Winds could gust as high as 35 mph.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 10am. Partly sunny, with a high near 76. West wind 5 to 10 mph becoming east northeast in the afternoon.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North northeast wind 5 to 10 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 72.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
Last Update:
9:41 pm CDT Jun 22, 2025
Forecast Valid:
10pm CDT Jun 22, 2025-6pm CDT Jun 29, 2025
 
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