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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fog

37°F

3°C

Humidity 100%
Wind Speed N 3 mph
Barometer 29.99 in (1016.4 mb)
Dewpoint 37°F (3°C)
Visibility 0.25 mi
Last update 5 Mar 12:51 am CST
Extended Forecast for

Winthrop Harbor IL

Dense Fog Advisory March 5, 01:51am until March 5, 12:00pm
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 5, 01:51am until March 5, 12:00pm

    NOW until 12:00pm Thu

    Dense Fog Advisory

  • Overnight

    Low: 36 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 10am. Widespread fog, mainly between 8am and 9am. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph.

    High: 44 °F

    Chance Rain
    and Fog

  • Thursday Night

    Thursday Night: Areas of fog. Otherwise, cloudy, with a low around 38. Northeast wind around 5 mph becoming calm.

    Low: 38 °F

    Areas Fog

  • Friday

    Friday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after 3pm. High near 62. Southeast wind 5 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 62 °F

    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. South wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before noon. Partly sunny, with a temperature rising to near 58 by 11am, then falling to around 47 during the remainder of the day. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 58 °F⇓

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36. Northwest wind 5 to 10 mph becoming southwest after midnight.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 57. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 57 °F

    Sunny

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Patchy fog. Otherwise, cloudy, with a low around 36. Northeast wind around 5 mph.
Thursday
A 30 percent chance of rain, mainly before 10am. Widespread fog, mainly between 8am and 9am. Otherwise, cloudy, with a high near 44. Northeast wind 5 to 10 mph.
Thursday Night
Areas of fog. Otherwise, cloudy, with a low around 38. Northeast wind around 5 mph becoming calm.
Friday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after 3pm. High near 62. Southeast wind 5 to 15 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 52. 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 showers before noon. Partly sunny, with a temperature rising to near 58 by 11am, then falling to around 47 during the remainder of the day. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 36. Northwest wind 5 to 10 mph becoming southwest after midnight.
Sunday
Sunny, with a high near 57. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 64.
Monday Night
A 20 percent chance of rain. Partly cloudy, with a low around 44.
Tuesday
Rain likely. Partly sunny, with a high near 58. Chance of precipitation is 70%.
Tuesday Night
Rain. Low around 39. Chance of precipitation is 80%.
Wednesday
Rain likely. Mostly cloudy, with a high near 48. Chance of precipitation is 60%.
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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:
1:32 am CST Mar 5, 2026
Forecast Valid:
1am CST Mar 5, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation