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.

Overcast

32°F

0°C

Humidity 75%
Wind Speed NE 7 mph
Barometer 30.25 in (1026.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 12 Feb 2:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Partly cloudy, with a low around 27. East wind around 5 mph becoming south after midnight.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 47. Southwest wind 5 to 15 mph.

    High: 47 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 31. West wind around 5 mph.

    Low: 31 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.

    High: 45 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34. South wind around 5 mph becoming west after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 47. West wind around 5 mph becoming north in the afternoon.

    High: 47 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 33. North wind around 5 mph becoming south after midnight.

    Low: 33 °F

    Mostly Cloudy

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 50. South wind 5 to 10 mph.

    High: 50 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 27. East wind around 5 mph becoming south after midnight.
Friday
Sunny, with a high near 47. Southwest wind 5 to 15 mph.
Friday Night
Mostly clear, with a low around 31. West wind around 5 mph.
Saturday
Partly sunny, with a high near 45. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 34. South wind around 5 mph becoming west after midnight.
Sunday
Sunny, with a high near 47. West wind around 5 mph becoming north in the afternoon.
Sunday Night
Mostly cloudy, with a low around 33. North wind around 5 mph becoming south after midnight.
Washington's Birthday
Partly sunny, with a high near 50. South wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 38.
Tuesday
Mostly cloudy, with a high near 49.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A 40 percent chance of rain. Mostly sunny, with a high near 53.
Wednesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 33.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
1:31 pm CST Feb 12, 2026
Forecast Valid:
3pm CST Feb 12, 2026-6pm CST Feb 19, 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