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

40°F

4°C

Humidity 60%
Wind Speed W 8 mph
Barometer 30.09 in (1019.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 13 Nov 1:51 am CST
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Clear, with a low around 36. West wind around 10 mph.

    Low: 36 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 54. West wind 5 to 10 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 40. South wind around 5 mph.

    Low: 40 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 58. South wind 5 to 10 mph.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 50. South wind 5 to 10 mph.

    Low: 50 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Mostly cloudy, with a high near 63. Southwest wind 10 to 15 mph becoming northwest in the afternoon.

    High: 63 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36. Northwest wind around 15 mph.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 48. West wind 10 to 15 mph.

    High: 48 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 36. West wind around 10 mph.
Thursday
Sunny, with a high near 54. West wind 5 to 10 mph.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 40. South wind around 5 mph.
Friday
Sunny, with a high near 58. South wind 5 to 10 mph.
Friday Night
Partly cloudy, with a low around 50. South wind 5 to 10 mph.
Saturday
A 20 percent chance of showers after noon. Mostly cloudy, with a high near 63. Southwest wind 10 to 15 mph becoming northwest in the afternoon.
Saturday Night
Partly cloudy, with a low around 36. Northwest wind around 15 mph.
Sunday
Sunny, with a high near 48. West wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 32.
Monday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 45.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Tuesday
A 30 percent chance of rain. Partly sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 47.
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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:
1:31 am CST Nov 13, 2025
Forecast Valid:
2am CST Nov 13, 2025-6pm CST Nov 19, 2025
 
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