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.

Mostly Cloudy

60°F

16°C

Humidity 93%
Wind Speed SW 13 mph
Barometer 29.73 in (1005.9 mb)
Dewpoint 58°F (14°C)
Visibility 8.00 mi
Last update 10 Mar 1:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 41. Southwest wind around 5 mph becoming northwest.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 44. North wind 5 to 10 mph.

    High: 44 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms, mainly before 3am, then a chance of rain after 4am. Patchy fog between 8pm and 3am. Low around 36. North wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 36 °F

    T-storms and
    Patchy Fog
    then Showers
    Likely and
    Patchy Fog

  • Wednesday

    Wednesday: Rain before 1pm, then a chance of rain and snow between 1pm and 4pm, then a chance of snow after 4pm. Patchy fog between 8am and 10am. High near 39. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 39 °F

    Rain and
    Patchy Fog
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 28. Northwest wind 5 to 15 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 45. West wind 5 to 10 mph becoming south in the afternoon.

    High: 45 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 37. Breezy, with a south wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain Likely
    and Breezy

  • Friday

    Friday: Partly sunny, with a high near 47. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 47 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 41. Southwest wind around 5 mph becoming northwest.
Tuesday
A 30 percent chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 44. North wind 5 to 10 mph.
Tuesday Night
Showers and thunderstorms, mainly before 3am, then a chance of rain after 4am. Patchy fog between 8pm and 3am. Low around 36. North wind 5 to 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Rain before 1pm, then a chance of rain and snow between 1pm and 4pm, then a chance of snow after 4pm. Patchy fog between 8am and 10am. High near 39. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 28. Northwest wind 5 to 15 mph.
Thursday
Mostly sunny, with a high near 45. West wind 5 to 10 mph becoming south in the afternoon.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 37. Breezy, with a south wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Partly sunny, with a high near 47. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
A slight chance of snow before 1pm, then a chance of rain and snow. Cloudy, with a high near 44. Chance of precipitation is 30%.
Saturday Night
Rain likely. Cloudy, with a low around 34. Chance of precipitation is 60%.
Sunday
Rain and snow. High near 41. Chance of precipitation is 80%.
Sunday Night
A chance of rain and snow. Cloudy, with a low around 19. Chance of precipitation is 50%.
Monday
A 20 percent chance of snow. Mostly cloudy, with a high near 27.
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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:
1:22 am CDT Mar 10, 2026
Forecast Valid:
2am CDT Mar 10, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation