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

63°F

17°C

Humidity 81%
Wind Speed N 8 mph
Barometer 29.97 in (1014.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 27 Jun 9:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 60. Northeast wind around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 77. East wind 5 to 10 mph.

    High: 77 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67. Southeast wind around 10 mph.

    Low: 67 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 88. South wind 10 to 15 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 74. South wind around 10 mph.

    Low: 74 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Southwest wind 10 to 15 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72. Southwest wind around 10 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 90. South wind around 10 mph.

    High: 90 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 60. Northeast wind around 5 mph.
Sunday
Mostly sunny, with a high near 77. East wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 67. Southeast wind around 10 mph.
Monday
Mostly sunny, with a high near 88. South wind 10 to 15 mph.
Monday Night
Mostly clear, with a low around 74. South wind around 10 mph.
Tuesday
Sunny and hot, with a high near 97. Southwest wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 72. Southwest wind around 10 mph.
Wednesday
Sunny and hot, with a high near 90. South wind around 10 mph.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 89.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Independence Day
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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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:
9:57 pm CDT Jun 27, 2026
Forecast Valid:
10pm CDT Jun 27, 2026-6pm CDT Jul 4, 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