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.

Mostly Cloudy

40°F

4°C

Humidity 36%
Wind Speed SW 9 mph
Barometer 29.85 in (1012.2 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 26 Feb 2:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 40. Southwest wind around 10 mph.

    High: 40 °F

    Mostly Sunny

  • Tonight

    Tonight: 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 59. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 59 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Northwest wind 10 to 15 mph.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon. Mostly cloudy, with a high near 32. North wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    High: 32 °F

    Snow Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 19. North wind around 10 mph.

    Low: 19 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 29. Northeast wind 5 to 10 mph.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 22. Northeast wind around 5 mph.

    Low: 22 °F

    Slight Chance
    Snow

  • Monday

    Monday: Mostly cloudy through mid morning, then becoming sunny, with a high near 34.

    High: 34 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 40. Southwest wind around 10 mph.
Tonight
Mostly clear, with a low around 32. Southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 59. Breezy, with a southwest wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Partly cloudy, with a low around 28. Northwest wind 10 to 15 mph.
Saturday
Snow likely, mainly after noon. Mostly cloudy, with a high near 32. North wind around 10 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
A 30 percent chance of snow before midnight. Cloudy, then gradually becoming partly cloudy, with a low around 19. North wind around 10 mph.
Sunday
Partly sunny, with a high near 29. Northeast wind 5 to 10 mph.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 22. Northeast wind around 5 mph.
Monday
Mostly cloudy through mid morning, then becoming sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 30.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 44.
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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:
1:37 pm CST Feb 26, 2026
Forecast Valid:
2pm CST Feb 26, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation