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 79%
Wind Speed E 10 G 23 mph
Barometer 30.02 in (1017.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 14 Mar 9:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

Winter Storm Watch March 15, 04:00pm until March 16, 07:00pm
Click here for hazard details and duration
Winter Storm Watch

  • Tonight

    Tonight: A 40 percent chance of rain, mainly between 11pm and 4am. Cloudy, with a low around 32. Breezy, with an east wind 15 to 20 mph, with gusts as high as 35 mph.

    Low: 32 °F

    Chance Rain
    and Breezy

  • Sunday

    Sunday: A slight chance of rain, then rain and possibly a thunderstorm after 10am. High near 54. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 54 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain, snow, and sleet before 1am, then snow, possibly mixed with sleet between 1am and 4am, then snow after 4am. Patchy blowing snow after 2am. Low around 21. Windy, with a southwest wind 15 to 25 mph becoming north in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 2 inches possible.

    Low: 21 °F

    Wintry Mix
    and Patchy
    Blowing Snow

  • Monday

    Monday: Snow, mainly before 1pm. Areas of blowing snow. High near 26. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.

    High: 26 °F

    Snow and
    Areas Blowing
    Snow

  • Monday Night

    Monday Night: Cloudy, then gradually becoming partly cloudy, with a low around 11. Windy, with a northwest wind 15 to 25 mph, with gusts as high as 35 mph.

    Low: 11 °F

    Decreasing
    Clouds and
    Windy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 26. West wind around 10 mph.

    High: 26 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 1am. Increasing clouds, with a low around 21. South wind 5 to 10 mph. Chance of precipitation is 70%.

    Low: 21 °F

    Chance Snow
    then Snow
    Likely

  • Wednesday

    Wednesday: A 20 percent chance of snow before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 41. South wind 10 to 15 mph.

    High: 41 °F

    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly between 11pm and 4am. Cloudy, with a low around 32. Breezy, with an east wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday
A slight chance of rain, then rain and possibly a thunderstorm after 10am. High near 54. Breezy, with a south wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Rain, snow, and sleet before 1am, then snow, possibly mixed with sleet between 1am and 4am, then snow after 4am. Patchy blowing snow after 2am. Low around 21. Windy, with a southwest wind 15 to 25 mph becoming north in the evening. Winds could gust as high as 45 mph. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 2 inches possible.
Monday
Snow, mainly before 1pm. Areas of blowing snow. High near 26. Windy, with a northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Monday Night
Cloudy, then gradually becoming partly cloudy, with a low around 11. Windy, with a northwest wind 15 to 25 mph, with gusts as high as 35 mph.
Tuesday
Mostly sunny, with a high near 26. West wind around 10 mph.
Tuesday Night
Snow likely, mainly after 1am. Increasing clouds, with a low around 21. South wind 5 to 10 mph. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of snow before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 41. South wind 10 to 15 mph.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 49.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Mostly sunny, with a high near 50.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Partly 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:
10:35 pm CDT Mar 14, 2026
Forecast Valid:
10pm CDT Mar 14, 2026-6pm CDT Mar 21, 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