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

45°F

7°C

Humidity 74%
Wind Speed W 12 G 23 mph
Barometer 29.72 in (1006.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 18 Apr 6:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: Cloudy, then gradually becoming mostly sunny, with a high near 52. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 52 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 35. West wind 5 to 15 mph.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 50. West wind 10 to 15 mph.

    High: 50 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. North wind 5 to 10 mph becoming northeast after midnight.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 50. Southeast wind 5 to 10 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. South wind around 10 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68. Southwest wind around 10 mph.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. North wind around 5 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Cloudy, then gradually becoming mostly sunny, with a high near 52. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 35. West wind 5 to 15 mph.
Sunday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 50. West wind 10 to 15 mph.
Sunday Night
Partly cloudy, with a low around 34. North wind 5 to 10 mph becoming northeast after midnight.
Monday
Sunny, with a high near 50. Southeast wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 41. South wind around 10 mph.
Tuesday
Mostly sunny, with a high near 68. Southwest wind around 10 mph.
Tuesday Night
Partly cloudy, with a low around 46. North wind around 5 mph.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Showers likely. Mostly cloudy, with a low around 55. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 68.
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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:
6:31 am CDT Apr 18, 2026
Forecast Valid:
6am CDT Apr 18, 2026-6pm CDT Apr 24, 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