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.

Light Rain Fog/Mist

37°F

3°C

Humidity 100%
Wind Speed NE 3 mph
Barometer 30.03 in (1018.1 mb)
Dewpoint 37°F (3°C)
Visibility 1.25 mi
Last update 4 Mar 7:51 pm CST
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: A 40 percent chance of rain, mainly after 4am. Patchy fog after midnight. Otherwise, cloudy, with a low around 38. Northeast wind around 5 mph.

    Low: 38 °F

    Cloudy then
    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: Rain likely, mainly before 3pm. Areas of fog before 3pm. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Rain Likely
    and Areas Fog

  • Thursday Night

    Thursday Night: Cloudy, with a low around 39. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 39 °F

    Cloudy

  • Friday

    Friday: Rain and possibly a thunderstorm. High near 62. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Rain

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 49. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Rain Likely
    then Rain

  • Saturday

    Saturday: A 30 percent chance of rain before noon. Partly sunny, with a high near 56. Southwest wind 5 to 15 mph becoming northwest in the afternoon.

    High: 56 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37. Northwest wind 5 to 10 mph becoming southwest after midnight.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 56. Southwest wind 10 to 15 mph.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly after 4am. Patchy fog after midnight. Otherwise, cloudy, with a low around 38. Northeast wind around 5 mph.
Thursday
Rain likely, mainly before 3pm. Areas of fog before 3pm. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Cloudy, with a low around 39. Northeast wind around 5 mph becoming southeast after midnight.
Friday
Rain and possibly a thunderstorm. High near 62. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Rain and possibly a thunderstorm. Low around 49. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 30 percent chance of rain before noon. Partly sunny, with a high near 56. Southwest wind 5 to 15 mph becoming northwest in the afternoon.
Saturday Night
Partly cloudy, with a low around 37. Northwest wind 5 to 10 mph becoming southwest after midnight.
Sunday
Mostly sunny, with a high near 56. Southwest wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 63.
Monday Night
A 30 percent chance of rain. Partly cloudy, with a low around 45.
Tuesday
Rain likely. Mostly cloudy, with a high near 56. Chance of precipitation is 70%.
Tuesday Night
Rain. Low around 34. Chance of precipitation is 80%.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 44. Chance of precipitation is 50%.
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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:
7:33 pm CST Mar 4, 2026
Forecast Valid:
8pm CST Mar 4, 2026-6pm CDT Mar 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation