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.

Light Snow Fog/Mist

27°F

-3°C

Humidity 85%
Wind Speed NE 10 mph
Barometer 30.18 in (1023.0 mb)
Dewpoint 23°F (-5°C)
Visibility 1.00 mi
Wind Chill18°F (-8°C)
Last update 28 Feb 1:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: A 40 percent chance of snow. Mostly cloudy, with a steady temperature around 29. Northeast wind around 15 mph.

    High: 29 °F

    Chance Snow

  • Tonight

    Tonight: Isolated snow showers after midnight. Mostly cloudy, with a low around 25. North northeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Cloudy then
    Isolated Snow
    Showers

  • Sunday

    Sunday: Isolated snow showers before noon. Partly sunny, with a high near 29. Northeast wind 5 to 15 mph. Chance of precipitation is 20%.

    High: 29 °F

    Isolated Snow
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25. East northeast wind 5 to 10 mph becoming southeast after midnight.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 37. Southeast wind 5 to 15 mph.

    High: 37 °F

    Sunny

  • Monday Night

    Monday Night: Rain likely, possibly mixed with snow, mainly after midnight. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.

    Low: 34 °F

    Mostly Cloudy
    then
    Rain/Snow
    Likely

  • Tuesday

    Tuesday: Rain likely, mainly before noon. Cloudy, with a high near 40. Chance of precipitation is 70%.

    High: 40 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A chance of rain before midnight. Partly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain
    then Partly
    Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 42.

    High: 42 °F

    Chance Rain

Detailed Forecast

This Afternoon
A 40 percent chance of snow. Mostly cloudy, with a steady temperature around 29. Northeast wind around 15 mph.
Tonight
Isolated snow showers after midnight. Mostly cloudy, with a low around 25. North northeast wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
Isolated snow showers before noon. Partly sunny, with a high near 29. Northeast wind 5 to 15 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 25. East northeast wind 5 to 10 mph becoming southeast after midnight.
Monday
Sunny, with a high near 37. Southeast wind 5 to 15 mph.
Monday Night
Rain likely, possibly mixed with snow, mainly after midnight. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.
Tuesday
Rain likely, mainly before noon. Cloudy, with a high near 40. Chance of precipitation is 70%.
Tuesday Night
A chance of rain before midnight. Partly cloudy, with a low around 34.
Wednesday
A chance of rain. Mostly cloudy, with a high near 42.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Thursday
A chance of rain. Mostly cloudy, with a high near 46.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 41.
Friday
Rain likely. Mostly cloudy, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
Last Update:
1:46 pm CST Feb 28, 2026
Forecast Valid:
2pm CST Feb 28, 2026-6pm CST Mar 6, 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