National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

62°F

17°C

Humidity 26%
Wind Speed SW 12 mph
Barometer 30.02 in (1016.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 4:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Mostly clear, with a low around 46. Southwest wind 5 to 10 mph.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 66. Southwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of rain between 9pm and 10pm, then a chance of rain and thunderstorms after 10pm. Increasing clouds, with a temperature rising to around 58 by 5am. Southeast wind 5 to 15 mph becoming southwest after midnight. Chance of precipitation is 50%.

    Low: 51 °F⇑

    Chance
    T-storms

  • Tuesday

    Tuesday: Rain likely and possibly a thunderstorm before 10am, then rain likely between 10am and 1pm, then rain and possibly a thunderstorm after 1pm. High near 66. Southwest wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 66 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain likely and possibly a thunderstorm. Cloudy, with a low around 36. North wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 36 °F

    Rain Likely

  • Wednesday

    Wednesday: A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 42. Northeast wind around 15 mph.

    High: 42 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain and snow likely, mainly after 1am. Cloudy, with a low around 34. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 34 °F

    Chance
    Rain/Snow
    then
    Rain/Snow
    Likely and
    Breezy

  • Thursday

    Thursday: Rain and snow likely, becoming all rain after 4pm. Cloudy, with a high near 45. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 45 °F

    Rain/Snow
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: Rain likely, mainly before 1am. Cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 46. Southwest wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 66. Southwest wind 5 to 10 mph becoming southeast in the afternoon.
Monday Night
A chance of rain between 9pm and 10pm, then a chance of rain and thunderstorms after 10pm. Increasing clouds, with a temperature rising to around 58 by 5am. Southeast wind 5 to 15 mph becoming southwest after midnight. Chance of precipitation is 50%.
Tuesday
Rain likely and possibly a thunderstorm before 10am, then rain likely between 10am and 1pm, then rain and possibly a thunderstorm after 1pm. High near 66. Southwest wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain likely and possibly a thunderstorm. Cloudy, with a low around 36. North wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 20 percent chance of rain after 1pm. Mostly cloudy, with a high near 42. Northeast wind around 15 mph.
Wednesday Night
Rain and snow likely, mainly after 1am. Cloudy, with a low around 34. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Rain and snow likely, becoming all rain after 4pm. Cloudy, with a high near 45. Breezy, with a northeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Rain likely, mainly before 1am. Cloudy, with a low around 37. Chance of precipitation is 60%.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 49.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39.
Saturday
Rain likely. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Saturday Night
Rain likely. Cloudy, with a low around 41. Chance of precipitation is 60%.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 51.
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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:
3:33 pm CDT Mar 29, 2026
Forecast Valid:
5pm CDT Mar 29, 2026-6pm CDT Apr 5, 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