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

18°F

-8°C

Humidity 84%
Wind Speed SW 6 mph
Barometer 30.19 in (1024.3 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 24 Feb 12:51 am CST
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 15. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 15 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain and snow showers after 3pm. Mostly cloudy, with a high near 40. Breezy, with a south southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 40%.

    High: 40 °F

    Breezy.
    Partly Sunny
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. West northwest wind around 15 mph, with gusts as high as 30 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 32. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 32 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 23. West northwest wind around 5 mph becoming north northeast after midnight. Winds could gust as high as 15 mph.

    Low: 23 °F

    Chance Snow

  • Thursday

    Thursday: A 20 percent chance of snow before noon. Mostly sunny, with a high near 37.

    High: 37 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 15. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
A chance of rain and snow showers after 3pm. Mostly cloudy, with a high near 40. Breezy, with a south southwest wind 10 to 15 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 22. West northwest wind around 15 mph, with gusts as high as 30 mph.
Wednesday
Sunny, with a high near 32. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 23. West northwest wind around 5 mph becoming north northeast after midnight. Winds could gust as high as 15 mph.
Thursday
A 20 percent chance of snow before noon. Mostly sunny, with a high near 37.
Thursday Night
Mostly clear, with a low around 28.
Friday
Mostly sunny, with a high near 54.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Partly sunny, with a high near 38.
Saturday Night
Mostly cloudy, with a low around 21.
Sunday
A chance of snow. Partly sunny, with a high near 29.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 22.
Monday
A chance of snow. Mostly cloudy, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
12:16 am CST Feb 24, 2026
Forecast Valid:
1am CST Feb 24, 2026-6pm CST Mar 2, 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