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

61°F

16°C

Humidity 84%
Wind Speed N 13 mph
Barometer 30.12 in (1019.4 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 14 Oct 12:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 62. North northeast wind around 15 mph.

    High: 62 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. North northeast wind around 15 mph.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain and possibly a thunderstorm, mainly after 1pm. High near 58. East southeast wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 58 °F

    Chance Rain
    then Rain

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 50. Northeast wind 5 to 10 mph becoming northwest 10 to 15 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 55. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 40 mph.

    High: 55 °F

    Chance Rain
    and Breezy

  • Friday Night

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

    Low: 38 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Patchy frost before 7am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 62. North northeast wind around 15 mph.
Tonight
Mostly cloudy, with a low around 56. North northeast wind around 15 mph.
Thursday
Rain and possibly a thunderstorm, mainly after 1pm. High near 58. East southeast wind 10 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Rain and possibly a thunderstorm before 1am, then a slight chance of rain. Low around 50. Northeast wind 5 to 10 mph becoming northwest 10 to 15 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Friday
A 30 percent chance of rain, mainly before 1pm. Partly sunny, with a high near 55. Breezy, with a northwest wind 20 to 25 mph, with gusts as high as 40 mph.
Friday Night
Partly cloudy, with a low around 38. Breezy.
Saturday
Patchy frost before 7am. Otherwise, sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 46.
Monday
Partly sunny, with a high near 65.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
9:26 am CDT Oct 14, 2026
Forecast Valid:
1pm CDT Oct 14, 2026-6pm CDT Oct 20, 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