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

42°F

6°C

Humidity 32%
Wind Speed SW 7 mph
Barometer 29.62 in (1003.2 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 18 Feb 9:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Partly cloudy, with a low around 38. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 45. South wind 5 to 10 mph becoming east northeast in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 45 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then rain likely, mainly between midnight and 3am. Low around 35. Northeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 35 °F

    Showers

  • Friday

    Friday: A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 41. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.

    High: 41 °F

    Breezy.
    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
A slight chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 45. South wind 5 to 10 mph becoming east northeast in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and possibly a thunderstorm before midnight, then rain likely, mainly between midnight and 3am. Low around 35. Northeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of rain and snow before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 41. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 27. West wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 36.
Saturday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 23.
Sunday
Mostly cloudy, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 30.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 30.
Wednesday
A chance of rain. Mostly cloudy, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
8:56 pm CST Feb 18, 2026
Forecast Valid:
10pm CST Feb 18, 2026-6pm CST Feb 25, 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