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.

Light Rain

41°F

5°C

Humidity 93%
Wind Speed NE 6 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 39°F (4°C)
Visibility 9.00 mi
Wind Chill37°F (3°C)
Last update 10 Apr 12:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Showers. Low around 41. North wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 41 °F

    Showers

  • Friday

    Friday: Showers likely, mainly before 7am. Mostly cloudy, with a high near 48. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 48 °F

    Showers
    Likely then
    Partly Sunny

  • Friday Night

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

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 51. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 51 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Cloudy, with a low around 43. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 43 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 69. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.

    High: 69 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Southwest wind 10 to 15 mph.

    High: 72 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Overnight
Showers. Low around 41. North wind around 10 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers likely, mainly before 7am. Mostly cloudy, with a high near 48. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Partly cloudy, with a low around 35. Northeast wind around 5 mph becoming calm in the evening.
Saturday
Increasing clouds, with a high near 51. Light east wind becoming southeast 5 to 10 mph in the morning.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Cloudy, with a low around 43. Southeast wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 69. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Southwest wind 10 to 15 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 72. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 55. Chance of precipitation is 80%.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 67.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 67.
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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:
1:21 am CDT Apr 10, 2026
Forecast Valid:
1am CDT Apr 10, 2026-6pm CDT Apr 16, 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