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.

Mostly Cloudy

66°F

19°C

Humidity 70%
Wind Speed E 8 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 14 Jun 12:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 69. Northeast wind around 10 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. North wind 5 to 10 mph.

    Low: 57 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 69. Northeast wind around 5 mph.

    High: 69 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers. Partly sunny, with a high near 76. Southeast wind 5 to 10 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 40%.

    High: 83 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 66. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 69. Northeast wind around 10 mph.
Tonight
Mostly clear, with a low around 57. North wind 5 to 10 mph.
Sunday
Mostly sunny, with a high near 69. Northeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 60. Northeast wind around 5 mph becoming southeast after midnight.
Monday
A 20 percent chance of showers. Partly sunny, with a high near 76. Southeast wind 5 to 10 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Southeast wind around 5 mph becoming southwest after midnight. Chance of precipitation is 30%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Partly sunny, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 66. Southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 79. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Juneteenth
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 78.
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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:
1:38 pm CDT Jun 14, 2025
Forecast Valid:
1pm CDT Jun 14, 2025-6pm CDT Jun 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