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

28°F

-2°C

Humidity 58%
Wind Speed NW 3 mph
Barometer 30.59 in (1036.9 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 28 Mar 2:51 am CDT
Extended Forecast for

Winthrop Harbor ILSimilar City Names

  • Overnight

    Overnight: Clear, with a low around 26. North northwest wind around 10 mph.

    Low: 26 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 47. North northwest wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 37. South southwest wind around 15 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 61. South southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74.

    High: 74 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Showers
    Likely

Detailed Forecast

Overnight
Clear, with a low around 26. North northwest wind around 10 mph.
Saturday
Sunny, with a high near 47. North northwest wind 5 to 10 mph becoming south southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Increasing clouds, with a low around 37. South southwest wind around 15 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 61. South southwest wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 45. South southwest wind around 10 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 67.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 74.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 36.
Wednesday
Partly sunny, with a high near 41.
Wednesday Night
Partly cloudy, with a low around 32.
Thursday
A chance of showers. Mostly sunny, with a high near 41.
Thursday Night
A chance of showers. Partly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 47.
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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:
1:20 am CDT Mar 28, 2026
Forecast Valid:
3am CDT Mar 28, 2026-6pm CDT Apr 3, 2026
 
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