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.

Partly Cloudy

32°F

0°C

Humidity 47%
Wind Speed W 9 mph
Barometer 29.67 in (1006.0 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 25 Feb 11:51 am CST
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 32. West wind 10 to 15 mph.

    High: 32 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 21. Northwest wind around 5 mph becoming calm after midnight.

    Low: 21 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 40. Light west wind becoming southwest 5 to 10 mph in the morning.

    High: 40 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 32. Southwest wind 5 to 10 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 29. Southwest wind 10 to 15 mph becoming northwest after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North wind around 10 mph.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 21. North wind around 10 mph.

    Low: 21 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: A 20 percent chance of snow. Mostly cloudy, with a high near 29.

    High: 29 °F

    Slight Chance
    Snow

Detailed Forecast

This Afternoon
Sunny, with a high near 32. West wind 10 to 15 mph.
Tonight
Mostly clear, with a low around 21. Northwest wind around 5 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 40. Light west wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 32. Southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 57. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Friday Night
Increasing clouds, with a low around 29. Southwest wind 10 to 15 mph becoming northwest after midnight.
Saturday
A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North wind around 10 mph.
Saturday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 21. North wind around 10 mph.
Sunday
A 20 percent chance of snow. Mostly cloudy, with a high near 29.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 22.
Monday
Mostly sunny, with a high near 33.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 25.
Tuesday
A 30 percent chance of snow. Partly sunny, with a high near 39.
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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:
12:22 pm CST Feb 25, 2026
Forecast Valid:
12pm CST Feb 25, 2026-6pm CST Mar 3, 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