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.

Overcast

56°F

13°C

Humidity 87%
Wind Speed W 12 G 24 mph
Barometer 29.79 in (1008.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 16 Oct 12:51 am CDT
Extended Forecast for

Winthrop Harbor IL

  • Overnight

    Overnight: Cloudy, with a low around 50. West northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 50 °F

    Cloudy

  • Friday

    Friday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 53. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: A 30 percent chance of showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

    Low: 36 °F

    Chance
    Showers and
    Breezy then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 55. North northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. Southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 50. West northwest wind around 15 mph, with gusts as high as 25 mph.
Friday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 53. Breezy, with a west northwest wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 30 percent chance of showers before 7pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 36. Breezy, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.
Saturday
Sunny, with a high near 55. North northwest wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Clear, with a low around 39. Southwest wind around 10 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 43.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winthrop Harbor IL
 42.47°N 87.84°W
Last Update:
12:21 am CDT Oct 16, 2026
Forecast Valid:
1am CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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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