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.

Overcast

39°F

4°C

Humidity 60%
Wind Speed W 8 mph
Barometer 29.97 in (1016.2 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 18 Mar 3:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 2am. Increasing clouds, with a low around 33. West wind around 5 mph.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 8am. Partly sunny, with a high near 42. North wind around 5 mph becoming southeast in the morning.

    High: 42 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 35. Northeast wind around 5 mph becoming southwest after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 54. Southwest wind 5 to 10 mph becoming northwest in the afternoon.

    High: 54 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. Northwest wind around 5 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 60. Northwest wind 5 to 10 mph becoming south in the afternoon.

    High: 60 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40. Southwest wind around 10 mph becoming north after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 48. North wind around 15 mph.

    High: 48 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of rain, mainly after 2am. Increasing clouds, with a low around 33. West wind around 5 mph.
Thursday
A 30 percent chance of rain, mainly before 8am. Partly sunny, with a high near 42. North wind around 5 mph becoming southeast in the morning.
Thursday Night
Mostly cloudy, with a low around 35. Northeast wind around 5 mph becoming southwest after midnight.
Friday
Mostly cloudy, with a high near 54. Southwest wind 5 to 10 mph becoming northwest in the afternoon.
Friday Night
Mostly cloudy, with a low around 38. Northwest wind around 5 mph.
Saturday
Partly sunny, with a high near 60. Northwest wind 5 to 10 mph becoming south in the afternoon.
Saturday Night
Mostly cloudy, with a low around 40. Southwest wind around 10 mph becoming north after midnight.
Sunday
Mostly cloudy, with a high near 48. North wind around 15 mph.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Partly sunny, with a high near 39.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.49°N 87.81°W (Elev. 600 ft)
Last Update:
2:57 pm CDT Mar 18, 2026
Forecast Valid:
4pm CDT Mar 18, 2026-6pm CDT Mar 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