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.

Overcast

26°F

-3°C

Humidity 84%
Wind Speed W 8 mph
Barometer 29.90 in (1014.1 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 31 Dec 2:51 am CST
Extended Forecast for

Grayslake IL

  • Overnight

    Overnight: Cloudy, with a steady temperature around 25. West wind around 10 mph.

    Low: 25 °F

    Cloudy

  • Wednesday

    Wednesday: Snow, mainly after 1pm. High near 33. West northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 33 °F

    Slight Chance
    Snow then
    Snow

  • Wednesday Night

    Wednesday Night: Cloudy during the early evening, then gradual clearing, with a low around 8. Wind chill values as low as -2. North northwest wind 5 to 15 mph, with gusts as high as 30 mph.

    Low: 8 °F

    Gradual
    Clearing

  • New Year's Day

    New Year's Day: Increasing clouds, with a high near 20. Wind chill values as low as -3. West northwest wind around 5 mph, with gusts as high as 10 mph.

    High: 20 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 13. West southwest wind around 5 mph.

    Low: 13 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 26.

    High: 26 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 13.

    Low: 13 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 25.

    High: 25 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a steady temperature around 25. West wind around 10 mph.
Wednesday
Snow, mainly after 1pm. High near 33. West northwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday Night
Cloudy during the early evening, then gradual clearing, with a low around 8. Wind chill values as low as -2. North northwest wind 5 to 15 mph, with gusts as high as 30 mph.
New Year's Day
Increasing clouds, with a high near 20. Wind chill values as low as -3. West northwest wind around 5 mph, with gusts as high as 10 mph.
Thursday Night
Mostly cloudy, with a low around 13. West southwest wind around 5 mph.
Friday
Sunny, with a high near 26.
Friday Night
Partly cloudy, with a low around 13.
Saturday
Mostly cloudy, with a high near 25.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Partly sunny, with a high near 31.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
Mostly cloudy, with a high near 37.
Monday Night
Mostly cloudy, with a low around 25.
Tuesday
Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.33°N 88.03°W
Last Update:
3:11 am CST Dec 31, 2025
Forecast Valid:
3am CST Dec 31, 2025-6pm CST Jan 6, 2026
 
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Additional Resources

Radar & Satellite Image

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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