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

31°F

-1°C

Humidity 69%
Wind Speed S 7 mph
Barometer 30.36 in (1029.3 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 24 Mar 4:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: Partly sunny, with a high near 49. South wind 5 to 10 mph.

    High: 49 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Southeast wind around 5 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 60. South wind 5 to 10 mph.

    High: 60 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48. Southwest wind around 5 mph.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of rain after 1pm. Partly sunny, with a high near 63. Southwest wind 5 to 10 mph becoming north in the afternoon.

    High: 63 °F

    Mostly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 31. North wind around 15 mph, with gusts as high as 25 mph.

    Low: 31 °F

    Slight Chance
    Rain

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 38. North wind 10 to 15 mph.

    High: 38 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 29. Northeast wind around 5 mph becoming southwest in the evening.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 49. South wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 37. Southeast wind around 5 mph.
Wednesday
Partly sunny, with a high near 60. South wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 48. Southwest wind around 5 mph.
Thursday
A 40 percent chance of rain after 1pm. Partly sunny, with a high near 63. Southwest wind 5 to 10 mph becoming north in the afternoon.
Thursday Night
A 20 percent chance of rain before 1am. Mostly cloudy, with a low around 31. North wind around 15 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 38. North wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 29. Northeast wind around 5 mph becoming southwest in the evening.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 58.
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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:
4:33 am CDT Mar 24, 2026
Forecast Valid:
5am CDT Mar 24, 2026-6pm CDT Mar 30, 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