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

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

36°F

2°C

Humidity 73%
Wind Speed S 9 mph
Barometer 29.84 in (1011.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 9 Feb 11:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 33. South wind 5 to 10 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. Northwest wind around 10 mph.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34. Northwest wind 5 to 10 mph.

    High: 34 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 23. Northwest wind around 5 mph.

    Low: 23 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 36. Calm wind becoming southwest around 5 mph.

    High: 36 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27. Calm wind becoming southwest around 5 mph after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 41. Southwest wind around 5 mph.

    High: 41 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 33. South wind 5 to 10 mph.
Tuesday
Partly sunny, with a high near 40. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Partly cloudy, with a low around 25. Northwest wind around 10 mph.
Wednesday
Mostly sunny, with a high near 34. Northwest wind 5 to 10 mph.
Wednesday Night
Increasing clouds, with a low around 23. Northwest wind around 5 mph.
Thursday
Mostly cloudy, with a high near 36. Calm wind becoming southwest around 5 mph.
Thursday Night
Mostly cloudy, with a low around 27. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 41. Southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 29.
Saturday
Sunny, with a high near 40.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 31.
Sunday
A 30 percent chance of rain. Mostly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 29.
Washington's Birthday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
12:21 am CST Feb 10, 2026
Forecast Valid:
12am CST Feb 10, 2026-6pm CST Feb 16, 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