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

70°F

21°C

Humidity 71%
Wind Speed SW 3 mph
Barometer 30.02 in (1015.5 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 30 Jul 8:51 pm CDT
Extended Forecast for

Winthrop Harbor ILSimilar City Names

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. South southwest wind around 5 mph.

    Low: 66 °F

    Mostly Cloudy

  • Friday

    Friday: A 40 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 77. South southwest wind 5 to 10 mph becoming east southeast in the afternoon. Winds could gust as high as 15 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 67. East southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 67 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 72. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    High: 72 °F

    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 63. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 63 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday

    Sunday: Partly sunny, with a high near 70. Breezy.

    High: 70 °F

    Mostly Cloudy
    then Mostly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 66. South southwest wind around 5 mph.
Friday
A 40 percent chance of showers, mainly after 3pm. Increasing clouds, with a high near 77. South southwest wind 5 to 10 mph becoming east southeast in the afternoon. Winds could gust as high as 15 mph.
Friday Night
Showers likely, then showers and possibly a thunderstorm after 11pm. Low around 67. East southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Saturday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 72. Breezy, with an east wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 63. Breezy, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Partly sunny, with a high near 70. Breezy.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 66.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor ILSimilar City Names
 42.47°N 87.84°W
Last Update:
8:11 pm CDT Jul 30, 2026
Forecast Valid:
9pm CDT Jul 30, 2026-6pm CDT Aug 6, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation