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 and Windy

70°F

21°C

Humidity 34%
Wind Speed S 30 G 45 mph
Barometer 29.95 in (1014.3 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 8 Apr 5:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Showers likely, mainly after 4am. Increasing clouds, with a low around 48. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Partly Cloudy
    then Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 59. West wind 5 to 10 mph.

    High: 59 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 8pm. Low around 39. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 39 °F

    Showers

  • Friday

    Friday: Showers likely, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 47. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 35. Northeast wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 51. East wind 5 to 10 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 44. South wind 5 to 10 mph.

    Low: 44 °F

    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Cloudy, with a high near 69. South wind 10 to 15 mph. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers likely, mainly after 4am. Increasing clouds, with a low around 48. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 59. West wind 5 to 10 mph.
Thursday Night
Showers, mainly after 8pm. Low around 39. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Showers likely, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 47. Northeast wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Mostly clear, with a low around 35. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 51. East wind 5 to 10 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 44. South wind 5 to 10 mph.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Cloudy, with a high near 69. South wind 10 to 15 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 38. Chance of precipitation is 70%.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 48.
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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:
5:32 pm CDT Apr 8, 2026
Forecast Valid:
5pm CDT Apr 8, 2026-6pm CDT Apr 15, 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