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.

A Few Clouds

27°F

-3°C

Humidity 61%
Wind Speed E 8 mph
Barometer 30.49 in (1034.0 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 1 Mar 2:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Mostly clear, with a low around 26. East wind around 5 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 39. Southeast wind 5 to 15 mph.

    High: 39 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 34. Southeast wind around 5 mph.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly before noon. Cloudy, with a high near 41. Southeast wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 36. Northeast wind around 5 mph.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, with thunderstorms also possible after noon. Partly sunny, with a high near 45. East wind around 5 mph. Chance of precipitation is 50%.

    High: 45 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain and thunderstorms, then rain likely after midnight. Cloudy, with a low around 38. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before noon. Mostly cloudy, with a high near 49. Northeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 49 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 26. East wind around 5 mph.
Monday
Increasing clouds, with a high near 39. Southeast wind 5 to 15 mph.
Monday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 34. Southeast wind around 5 mph.
Tuesday
Rain likely, mainly before noon. Cloudy, with a high near 41. Southeast wind around 5 mph becoming northeast in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 36. Northeast wind around 5 mph.
Wednesday
A chance of rain, with thunderstorms also possible after noon. Partly sunny, with a high near 45. East wind around 5 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of rain and thunderstorms, then rain likely after midnight. Cloudy, with a low around 38. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain likely, mainly before noon. Mostly cloudy, with a high near 49. Northeast wind 5 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39.
Friday
Rain. High near 62. Chance of precipitation is 80%.
Friday Night
Rain likely. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Saturday
A 30 percent chance of rain. Mostly cloudy, with a high near 53.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 38.
Sunday
A 20 percent chance of rain. Sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
1:32 pm CST Mar 1, 2026
Forecast Valid:
3pm CST Mar 1, 2026-6pm CDT Mar 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation