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.

Overcast

34°F

1°C

Humidity 85%
Wind Speed N 17 G 31 mph
Barometer 30.18 in (1022.8 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 1 Apr 5:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: A slight chance of showers between 9am and 10am. Mostly cloudy, with a high near 41. Breezy, with a northeast wind 5 to 10 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 41 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Cloudy

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 4am. Low around 37. Breezy, with an east wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Breezy.
    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 64. East wind around 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 64 °F

    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm, mainly before 1am. Low around 45. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 57. West wind 5 to 10 mph becoming east in the afternoon.

    High: 57 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 44. Northeast wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 59. South wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 34. West wind around 15 mph.

    Low: 34 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

Detailed Forecast

Today
A slight chance of showers between 9am and 10am. Mostly cloudy, with a high near 41. Breezy, with a northeast wind 5 to 10 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Tonight
Showers, with thunderstorms also possible after 4am. Low around 37. Breezy, with an east wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 64. East wind around 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Thursday Night
Showers and possibly a thunderstorm, mainly before 1am. Low around 45. West wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 57. West wind 5 to 10 mph becoming east in the afternoon.
Friday Night
Showers and possibly a thunderstorm. Low around 44. Northeast wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 59. South wind 10 to 15 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 34. West wind around 15 mph.
Sunday
Mostly cloudy, with a high near 47.
Sunday Night
Mostly clear, with a low around 33.
Monday
A chance of rain and snow showers. Partly sunny, with a high near 50. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 33.
Tuesday
Mostly cloudy, with a high near 42.
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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:
6:41 am CDT Apr 1, 2026
Forecast Valid:
6am CDT Apr 1, 2026-6pm CDT Apr 7, 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