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

28°F

-2°C

Humidity 58%
Wind Speed NW 3 mph
Barometer 30.59 in (1036.9 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Last update 28 Mar 2:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Clear, with a low around 27. North wind 5 to 10 mph.

    Low: 27 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 46. Northwest wind 5 to 10 mph becoming south in the afternoon.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 39. Southwest wind 10 to 15 mph.

    Low: 39 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 60. Southwest wind 10 to 15 mph.

    High: 60 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45. South wind 5 to 10 mph.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 64. South wind 5 to 10 mph.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind 10 to 15 mph.

    Low: 55 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Southwest wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 70 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 1am. Cloudy, with a low around 36. Chance of precipitation is 60%.

    Low: 36 °F

    Rain Likely

Detailed Forecast

Overnight
Clear, with a low around 27. North wind 5 to 10 mph.
Saturday
Sunny, with a high near 46. Northwest wind 5 to 10 mph becoming south in the afternoon.
Saturday Night
Increasing clouds, with a low around 39. Southwest wind 10 to 15 mph.
Sunday
Partly sunny, with a high near 60. Southwest wind 10 to 15 mph.
Sunday Night
Partly cloudy, with a low around 45. South wind 5 to 10 mph.
Monday
Mostly sunny, with a high near 64. South wind 5 to 10 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 55. South wind 10 to 15 mph.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Southwest wind around 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain likely, mainly before 1am. Cloudy, with a low around 36. Chance of precipitation is 60%.
Wednesday
Mostly cloudy, with a high near 43.
Wednesday Night
A 20 percent chance of snow. Partly cloudy, with a low around 32.
Thursday
A chance of rain and snow. Mostly sunny, with a high near 45. Chance of precipitation is 30%.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 37.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
3:32 am CDT Mar 28, 2026
Forecast Valid:
3am CDT Mar 28, 2026-6pm CDT Apr 3, 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