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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

28°F

-2°C

Humidity 69%
Wind Speed Calm
Barometer 29.96 in (1016.1 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 6 Dec 7:51 pm CST
Extended Forecast for

Winthrop Harbor IL

Winter Weather Advisory December 7, 12:00am until December 7, 09:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Snow, mainly after midnight. Low around 26. Southwest wind 5 to 10 mph becoming east northeast in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 inches possible.

    Low: 26 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: A 50 percent chance of snow before noon. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 20 by 5pm. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 27 °F⇓

    Chance Snow
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 17. North northwest wind 5 to 10 mph becoming east after midnight. Winds could gust as high as 20 mph.

    Low: 17 °F

    Slight Chance
    Snow

  • Monday

    Monday: Partly sunny, with a high near 26. East southeast wind 5 to 10 mph becoming south southwest in the morning. Winds could gust as high as 15 mph.

    High: 26 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 20. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 25 mph.

    Low: 20 °F

    Chance Snow
    and Breezy

  • Tuesday

    Tuesday: A slight chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.

    High: 39 °F

    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow. Low around 34. Breezy. Chance of precipitation is 90%.

    Low: 34 °F

    Rain/Snow and
    Breezy

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 38. Breezy.

    High: 38 °F

    Breezy.
    Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday Night

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

Detailed Forecast

Tonight
Snow, mainly after midnight. Low around 26. Southwest wind 5 to 10 mph becoming east northeast in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 2 to 4 inches possible.
Sunday
A 50 percent chance of snow before noon. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 20 by 5pm. North wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 17. North northwest wind 5 to 10 mph becoming east after midnight. Winds could gust as high as 20 mph.
Monday
Partly sunny, with a high near 26. East southeast wind 5 to 10 mph becoming south southwest in the morning. Winds could gust as high as 15 mph.
Monday Night
A 40 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 20. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 25 mph.
Tuesday
A slight chance of rain and snow. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.
Tuesday Night
Rain, possibly mixed with snow. Low around 34. Breezy. Chance of precipitation is 90%.
Wednesday
A chance of rain and snow before noon, then a chance of snow. Mostly cloudy, with a high near 38. Breezy.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 19.
Thursday
A chance of snow. Mostly cloudy, with a high near 28.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 13.
Friday
Partly sunny, with a high near 20.
Friday Night
A chance of snow. Mostly cloudy, with a low around 6.
Saturday
Partly sunny, with a high near 15.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
Last Update:
8:30 pm CST Dec 6, 2025
Forecast Valid:
8pm CST Dec 6, 2025-6pm CST Dec 13, 2025
 
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