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.

Partly Cloudy

74°F

23°C

Humidity 56%
Wind Speed Vrbl 7 mph
Barometer 29.93 in (1012.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Jun 12:51 pm CDT
Extended Forecast for

Winthrop Harbor IL

  • This Afternoon

    This Afternoon: A slight chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 71. East wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 71 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming west after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers between 1pm and 4pm. Partly sunny, with a high near 65. Northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    High: 65 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. North northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. Northeast wind around 10 mph.

    High: 70 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 71. East wind 5 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 56. Northeast wind around 5 mph becoming west after midnight.
Friday
A slight chance of showers between 1pm and 4pm. Partly sunny, with a high near 65. Northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 58. North northeast wind around 10 mph, with gusts as high as 15 mph.
Saturday
Mostly sunny, with a high near 70. Northeast wind around 10 mph.
Saturday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 86.
Monday Night
Partly cloudy, with a low around 74.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.81°W
Last Update:
1:21 pm CDT Jun 25, 2026
Forecast Valid:
1pm CDT Jun 25, 2026-6pm CDT Jul 1, 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