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

41°F

5°C

Humidity 76%
Wind Speed N 12 G 22 mph
Barometer 29.86 in (1011.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 12 Nov 5:51 am CST
Extended Forecast for

Great Lakes IL

  • Today

    Today: Showers likely, mainly between 1pm and 5pm. Mostly cloudy, with a high near 42. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Showers
    Likely and
    Breezy

  • Tonight

    Tonight: A chance of rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Mostly cloudy, with a low around 33. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.

    Low: 33 °F

    Breezy.
    Chance
    Showers then
    Chance
    Rain/Snow

  • Friday

    Friday: Snow showers likely before 8am, then rain and snow showers likely between 8am and 9am, then rain showers likely after 9am. Mostly cloudy, with a high near 42. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow
    Likely and
    Breezy then
    Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of rain and snow showers before midnight. Partly cloudy, with a low around 29. North northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 46. Northwest wind 5 to 10 mph.

    High: 46 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

Detailed Forecast

Today
Showers likely, mainly between 1pm and 5pm. Mostly cloudy, with a high near 42. Breezy, with a north wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of rain showers before 1am, then a chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Mostly cloudy, with a low around 33. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%.
Friday
Snow showers likely before 8am, then rain and snow showers likely between 8am and 9am, then rain showers likely after 9am. Mostly cloudy, with a high near 42. Breezy, with a north wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
A slight chance of rain and snow showers before midnight. Partly cloudy, with a low around 29. North northwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 46. Northwest wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Sunny, with a high near 48.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 48.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly clear, with a low around 34.
Wednesday
Sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Lakes IL
 42.3°N 87.85°W
Last Update:
4:41 am CST Nov 12, 2026
Forecast Valid:
6am CST Nov 12, 2026-6pm CST Nov 18, 2026
 
Forecast Discussion
 
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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