National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

62°F

17°C

Humidity 38%
Wind Speed SW 20 G 28 mph
Barometer 29.70 in (1005.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 9 Mar 10:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Today

    Today: Sunny, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. South wind around 5 mph becoming north after midnight.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog. Otherwise, partly sunny, with a high near 47. North wind 5 to 10 mph. Chance of precipitation is 30%.

    High: 47 °F

    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Areas of fog before 1am. Low around 37. North wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 37 °F

    Showers and
    Areas Fog

  • Wednesday

    Wednesday: Rain showers likely before 4pm, then a chance of snow showers. Cloudy, with a high near 42. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 42 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29. Northwest wind 10 to 15 mph.

    Low: 29 °F

    Chance Snow
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 43. Northwest wind 5 to 10 mph becoming south in the afternoon.

    High: 43 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, then gradually becoming partly cloudy, with a low around 36. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain Likely
    and Breezy

  • Friday

    Friday: A 20 percent chance of rain before 1pm. Mostly sunny, with a high near 45.

    High: 45 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tonight
Patchy fog after 4am. Otherwise, partly cloudy, with a low around 42. South wind around 5 mph becoming north after midnight.
Tuesday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Patchy fog. Otherwise, partly sunny, with a high near 47. North wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday Night
Showers and possibly a thunderstorm. Areas of fog before 1am. Low around 37. North wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Wednesday
Rain showers likely before 4pm, then a chance of snow showers. Cloudy, with a high near 42. North wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of snow showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 29. Northwest wind 10 to 15 mph.
Thursday
Increasing clouds, with a high near 43. Northwest wind 5 to 10 mph becoming south in the afternoon.
Thursday Night
Rain likely, mainly after 1am. Cloudy, then gradually becoming partly cloudy, with a low around 36. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 20 percent chance of rain before 1pm. Mostly sunny, with a high near 45.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Saturday Night
A chance of rain and snow. Cloudy, with a low around 34. Chance of precipitation is 50%.
Sunday
Rain and snow likely. Cloudy, with a high near 44. Chance of precipitation is 70%.
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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:
8:38 am CDT Mar 9, 2026
Forecast Valid:
11am CDT Mar 9, 2026-6pm CDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation