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.

Fair

18°C

65°F

Humidity 84%
Wind Speed SW 6 km/h
Barometer 1016.1 mb (30.04 in)
Dewpoint 16°C (60°F)
Visibility 11 km
Last update 13 Jul 11:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Widespread haze. Mostly clear, with a low around 18. West wind around 10 km/h.

    Low: 18 °C

    Haze

  • Monday

    Monday: Sunny, with a high near 28. West southwest wind 10 to 15 km/h becoming south southeast in the afternoon.

    High: 28 °C

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. South southeast wind around 10 km/h.

    Low: 20 °C

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 27. Southeast wind 5 to 15 km/h.

    High: 27 °C

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 22. South southwest wind around 10 km/h.

    Low: 22 °C

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 29. Chance of precipitation is 30%.

    High: 29 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 21.

    Low: 21 °C

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 26.

    High: 26 °C

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 18.

    Low: 18 °C

    Chance
    Showers

Detailed Forecast

Overnight
Widespread haze. Mostly clear, with a low around 18. West wind around 10 km/h.
Monday
Sunny, with a high near 28. West southwest wind 10 to 15 km/h becoming south southeast in the afternoon.
Monday Night
Mostly clear, with a low around 20. South southeast wind around 10 km/h.
Tuesday
Sunny, with a high near 27. Southeast wind 5 to 15 km/h.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 22. South southwest wind around 10 km/h.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 29. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 21.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 26.
Thursday Night
A chance of showers before 1am. Mostly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 23.
Friday Night
Partly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 25.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 20.
Sunday
A chance of showers. Mostly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
Last Update:
12:27 am CDT Jul 14, 2025
Forecast Valid:
12am CDT Jul 14, 2025-6pm CDT Jul 20, 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