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

57°F

14°C

Humidity 78%
Wind Speed SW 18 G 28 mph
Barometer 29.63 in (1002.9 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 4 Nov 1:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle before 3pm, then a slight chance of drizzle or sprinkles after 3pm. Cloudy, with a high near 63. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: A slight chance of drizzle or sprinkles before 10pm. Cloudy, with a low around 45. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Slight Chance
    Drizzle

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Mostly cloudy, with a high near 54. Southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Chance Rain
    then Rain
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of rain, mainly before 7pm. Mostly cloudy, with a low around 37. North northwest wind around 15 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Chance Rain
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 49. Breezy, with a north northwest wind 15 to 20 mph.

    High: 49 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of drizzle before 3pm, then a slight chance of drizzle or sprinkles after 3pm. Cloudy, with a high near 63. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
A slight chance of drizzle or sprinkles before 10pm. Cloudy, with a low around 45. Southwest wind around 15 mph, with gusts as high as 25 mph.
Thursday
Rain likely, mainly after 5pm. Mostly cloudy, with a high near 54. Southwest wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 50 percent chance of rain, mainly before 7pm. Mostly cloudy, with a low around 37. North northwest wind around 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 49. Breezy, with a north northwest wind 15 to 20 mph.
Friday Night
Partly cloudy, with a low around 34.
Saturday
Sunny, with a high near 51.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 37.
Monday
Sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
1:06 pm CST Nov 4, 2026
Forecast Valid:
2pm CST Nov 4, 2026-6pm CST Nov 10, 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