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.

Light Rain

37°F

3°C

Humidity 93%
Wind Speed W 10 mph
Barometer 29.24 in (991.1 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 10 Dec 4:51 am CST
Extended Forecast for

Grayslake IL

  • Overnight

    Overnight: Showers likely. Cloudy, with a steady temperature around 36. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Rain and snow showers, becoming all snow after 8am. Temperature falling to around 25 by 5pm. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    High: 33 °F⇓

    Breezy.
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow showers before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 9. Wind chill values as low as zero. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 9 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 22. Wind chill values as low as -1. West northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 22 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 15. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.

    Low: 15 °F

    Snow Likely

  • Friday

    Friday: A 40 percent chance of snow. Mostly cloudy, with a high near 27.

    High: 27 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 3.

    Low: 3 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow. Mostly cloudy and cold, with a high near 10.

    High: 10 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow before midnight. Partly cloudy, with a low around -4.

    Low: -4 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
Showers likely. Cloudy, with a steady temperature around 36. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain and snow showers, becoming all snow after 8am. Temperature falling to around 25 by 5pm. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday Night
A 20 percent chance of snow showers before 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 9. Wind chill values as low as zero. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 22. Wind chill values as low as -1. West northwest wind around 5 mph, with gusts as high as 15 mph.
Thursday Night
Snow likely. Mostly cloudy, with a low around 15. Southwest wind around 5 mph becoming calm. Chance of precipitation is 60%.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 27.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 3.
Saturday
A chance of snow. Mostly cloudy and cold, with a high near 10.
Saturday Night
A chance of snow before midnight. Partly cloudy, with a low around -4.
Sunday
Sunny and cold, with a high near 7.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Partly sunny, with a high near 21.
Monday Night
Mostly cloudy, with a low around 11.
Tuesday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.37°N 88.05°W
Last Update:
5:21 am CST Dec 10, 2025
Forecast Valid:
5am CST Dec 10, 2025-6pm CST Dec 16, 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