National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

30°F

-1°C

Humidity 54%
Wind Speed W 17 G 26 mph
Barometer 30.19 in (1023.6 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 27 Nov 11:51 am CST
Extended Forecast for

Grayslake IL

Winter Storm Watch November 29, 03:00am until November 30, 06:00am
Click here for hazard details and duration
Winter Storm Watch

  • Thanksgiving Day

    Thanksgiving Day: A slight chance of flurries. Cloudy, with a temperature falling to around 28 by 5pm. West northwest wind around 15 mph, with gusts as high as 30 mph.

    High: 31 °F⇓

    Slight Chance
    Flurries

  • Tonight

    Tonight: Mostly cloudy, with a low around 21. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 31. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 31 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of snow after midnight. Increasing clouds, with a low around 19. West wind around 5 mph becoming calm.

    Low: 19 °F

    Partly Cloudy
    then Chance
    Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. High near 31. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.

    High: 31 °F

    Heavy Snow

  • Saturday Night

    Saturday Night: Snow. The snow could be heavy at times. Low around 26. Chance of precipitation is 100%.

    Low: 26 °F

    Heavy Snow

  • Sunday

    Sunday: Snow likely, mainly before noon. Mostly cloudy, with a high near 31. Chance of precipitation is 60%.

    High: 31 °F

    Snow Likely
    then Chance
    Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 5.

    Low: 5 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 20.

    High: 20 °F

    Partly Sunny

Detailed Forecast

Thanksgiving Day
A slight chance of flurries. Cloudy, with a temperature falling to around 28 by 5pm. West northwest wind around 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 21. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 31. West northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
A 40 percent chance of snow after midnight. Increasing clouds, with a low around 19. West wind around 5 mph becoming calm.
Saturday
Snow. The snow could be heavy at times. High near 31. South southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Saturday Night
Snow. The snow could be heavy at times. Low around 26. Chance of precipitation is 100%.
Sunday
Snow likely, mainly before noon. Mostly cloudy, with a high near 31. Chance of precipitation is 60%.
Sunday Night
Partly cloudy, with a low around 5.
Monday
Partly sunny, with a high near 20.
Monday Night
Mostly cloudy, with a low around 5.
Tuesday
Partly sunny, with a high near 22.
Tuesday Night
Mostly cloudy, with a low around 10.
Wednesday
Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.37°N 88.05°W
Last Update:
12:01 pm CST Nov 27, 2025
Forecast Valid:
12pm CST Nov 27, 2025-6pm CST Dec 3, 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