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

21°F

-6°C

Humidity 47%
Wind Speed SW 12 mph
Barometer 30.16 in (1023.4 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 17 Mar 5:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Snow, mainly after midnight. Low around 20. South wind 10 to 15 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 20 °F

    Mostly Cloudy
    then Snow

  • Wednesday

    Wednesday: Patchy snow and freezing rain before 9am. Cloudy, then gradually becoming mostly sunny, with a high near 41. South wind 10 to 15 mph. Chance of precipitation is 30%.

    High: 41 °F

    Patchy Wintry
    Mix then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 35. Southwest wind around 5 mph.

    Low: 35 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 44. South wind around 5 mph becoming north in the afternoon.

    High: 44 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. North wind around 5 mph becoming south after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 51. Southwest wind 5 to 10 mph.

    High: 51 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. North wind around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 60. Southwest wind 5 to 10 mph.

    High: 60 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Snow, mainly after midnight. Low around 20. South wind 10 to 15 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of less than a half inch possible.
Wednesday
Patchy snow and freezing rain before 9am. Cloudy, then gradually becoming mostly sunny, with a high near 41. South wind 10 to 15 mph. Chance of precipitation is 30%.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 35. Southwest wind around 5 mph.
Thursday
A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 44. South wind around 5 mph becoming north in the afternoon.
Thursday Night
Mostly cloudy, with a low around 36. North wind around 5 mph becoming south after midnight.
Friday
Mostly cloudy, with a high near 51. Southwest wind 5 to 10 mph.
Friday Night
Mostly cloudy, with a low around 38. North wind around 5 mph.
Saturday
Partly sunny, with a high near 60. Southwest wind 5 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
A 20 percent chance of rain before 1pm. Partly sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 30.
Monday
Mostly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly cloudy, with a high near 45.
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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:
6:32 pm CDT Mar 17, 2026
Forecast Valid:
6pm CDT Mar 17, 2026-6pm CDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation