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

29°F

-2°C

Humidity 75%
Wind Speed W 10 mph
Barometer 29.52 in (1000.7 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 25 Feb 3:51 am CST
Extended Forecast for

Winthrop Harbor IL

  • Today

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

    High: 32 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Northwest wind around 5 mph becoming calm after midnight.

    Low: 20 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 41. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 41 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Southwest wind 5 to 10 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 54. Southwest wind 10 to 15 mph.

    High: 54 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29. Southwest wind around 10 mph becoming northwest after midnight.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Mostly cloudy, with a high near 35. North wind around 10 mph.

    High: 35 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 22. North wind around 10 mph.

    Low: 22 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny
    then Slight
    Chance Snow

Detailed Forecast

Today
Sunny, with a high near 32. West wind 10 to 15 mph.
Tonight
Partly cloudy, with a low around 20. Northwest wind around 5 mph becoming calm after midnight.
Thursday
Mostly sunny, with a high near 41. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Thursday Night
Mostly clear, with a low around 31. Southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 54. Southwest wind 10 to 15 mph.
Friday Night
Partly cloudy, with a low around 29. Southwest wind around 10 mph becoming northwest after midnight.
Saturday
A 50 percent chance of snow after noon. Mostly cloudy, with a high near 35. North wind around 10 mph.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 22. North wind around 10 mph.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 30.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 23.
Monday
A 20 percent chance of snow. Partly 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 38.
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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:
3:36 am CST Feb 25, 2026
Forecast Valid:
4am 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