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.

Overcast

31°F

-1°C

Humidity 72%
Wind Speed N 10 mph
Barometer 30.38 in (1029.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 6 Apr 11:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: A 20 percent chance of snow showers. Mostly cloudy, with a low around 29. North northeast wind around 15 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Slight Chance
    Snow Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. North northeast wind around 10 mph becoming east in the afternoon.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers between 1am and 4am, then a chance of rain showers, snow showers, and sleet. Increasing clouds, with a temperature rising to around 36 by 3am. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 32 °F⇑

    Mostly Cloudy
    then Chance
    Wintry Mix

  • Wednesday

    Wednesday: A chance of rain showers and sleet before 7am. Mostly cloudy, with a high near 60. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 60 °F

    Breezy.
    Chance
    Rain/Sleet
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 48. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Showers
    Likely and
    Breezy

  • Thursday

    Thursday: A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers before 1pm. Mostly cloudy, with a high near 50.

    High: 50 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow showers. Mostly cloudy, with a low around 29. North northeast wind around 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 34. North northeast wind around 10 mph becoming east in the afternoon.
Tuesday Night
A slight chance of snow showers between 1am and 4am, then a chance of rain showers, snow showers, and sleet. Increasing clouds, with a temperature rising to around 36 by 3am. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday
A chance of rain showers and sleet before 7am. Mostly cloudy, with a high near 60. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 48. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
Thursday
A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 62.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Friday
A chance of showers before 1pm. Mostly cloudy, with a high near 50.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 44.
Sunday
A chance of showers. Mostly cloudy, with a high near 71.
Sunday Night
Showers likely. Mostly cloudy, with a low around 56.
Monday
Showers likely. Mostly cloudy, with a high near 73.
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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:
11:56 pm CDT Apr 6, 2026
Forecast Valid:
12am CDT Apr 7, 2026-6pm CDT Apr 13, 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