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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

78°F

26°C

Humidity 85%
Wind Speed SE 5 mph
Barometer 30.04 in (1015.8 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 27 Jul 9:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

Heat Advisory July 28, 12:00pm until July 28, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 73. South southeast wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89. Heat index values as high as 100. West southwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. East southeast wind around 5 mph becoming west after midnight.

    Low: 74 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. North northwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.

    High: 84 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. North northeast wind around 5 mph.

    Low: 70 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.

    High: 75 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 73. South southeast wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 89. Heat index values as high as 100. West southwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74. East southeast wind around 5 mph becoming west after midnight.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 84. North northwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. North northeast wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 65.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 75.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
9:41 pm CDT Jul 27, 2025
Forecast Valid:
9pm CDT Jul 27, 2025-6pm CDT Aug 3, 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