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

66°F

19°C

Humidity 75%
Wind Speed Calm
Barometer 29.91 in (1012.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 11 Oct 5:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Partly cloudy, with a low around 60. South southwest wind 5 to 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 83. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers, mainly after 10pm. Partly cloudy, with a low around 58. North wind around 5 mph.

    Low: 58 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 65.

    High: 65 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 64.

    High: 64 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 60. South southwest wind 5 to 10 mph.
Columbus Day
Mostly sunny, with a high near 83. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 68. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 79. West wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A 50 percent chance of showers, mainly after 10pm. Partly cloudy, with a low around 58. North wind around 5 mph.
Wednesday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 52.
Thursday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 64.
Thursday Night
A chance of showers before 1am. Mostly cloudy, with a low around 48.
Friday
Partly sunny, with a high near 58. Breezy.
Friday Night
Mostly cloudy, with a low around 37. Breezy.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
3:36 pm CDT Oct 11, 2026
Forecast Valid:
6pm CDT Oct 11, 2026-6pm CDT Oct 18, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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