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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

-11°C

13°F

Humidity 64%
Wind Speed SW 24 km/h
Barometer 1015.0 mb (29.90 in)
Dewpoint -16°C (3°F)
Visibility 16 km
Wind Chill-19°C (-3°F)
Last update 18 Jan 1:51 pm CST
Extended Forecast for

Grayslake IL

Cold Weather Advisory January 19, 03:00am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: A chance of flurries before 4pm, then snow, mainly after 5pm. High near -9. Wind chill values as low as -17. Southwest wind 15 to 20 km/h, with gusts as high as 35 km/h. Chance of precipitation is 80%. Total daytime snow accumulation of less than one centimeter possible.

    High: -9 °C

    Snow

  • Tonight

    Tonight: Snow before midnight, then scattered snow showers, mainly between midnight and 2am. Low around -18. Wind chill values as low as -30. Blustery, with a southwest wind 15 to 25 km/h becoming west northwest 30 to 40 km/h after midnight. Winds could gust as high as 60 km/h. Chance of precipitation is 100%. New snow accumulation of 1 to 3 centimeters possible.

    Low: -18 °C

    Snow then
    Scattered
    Snow Showers
    and Blustery

  • M.L.King Day

    M.L.King Day: Isolated snow showers before 7am. Mostly sunny and cold, with a high near -15. Wind chill values as low as -31. Blustery, with a west northwest wind 35 to 40 km/h decreasing to 25 to 30 km/h in the afternoon. Winds could gust as high as 60 km/h. Chance of precipitation is 20%.

    High: -15 °C

    Blustery.
    Isolated Snow
    Showers then
    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around -18. Wind chill values as low as -26. West wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 35 km/h.

    Low: -18 °C

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near -8. West wind 10 to 15 km/h, with gusts as high as 25 km/h.

    High: -8 °C

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around -12. Chance of precipitation is 60%.

    Low: -12 °C

    Slight Chance
    Snow then
    Snow Likely

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near -3.

    High: -3 °C

    Chance Snow

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around -14.

    Low: -14 °C

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near -9.

    High: -9 °C

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of flurries before 4pm, then snow, mainly after 5pm. High near -9. Wind chill values as low as -17. Southwest wind 15 to 20 km/h, with gusts as high as 35 km/h. Chance of precipitation is 80%. Total daytime snow accumulation of less than one centimeter possible.
Tonight
Snow before midnight, then scattered snow showers, mainly between midnight and 2am. Low around -18. Wind chill values as low as -30. Blustery, with a southwest wind 15 to 25 km/h becoming west northwest 30 to 40 km/h after midnight. Winds could gust as high as 60 km/h. Chance of precipitation is 100%. New snow accumulation of 1 to 3 centimeters possible.
M.L.King Day
Isolated snow showers before 7am. Mostly sunny and cold, with a high near -15. Wind chill values as low as -31. Blustery, with a west northwest wind 35 to 40 km/h decreasing to 25 to 30 km/h in the afternoon. Winds could gust as high as 60 km/h. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around -18. Wind chill values as low as -26. West wind 20 to 25 km/h decreasing to 10 to 15 km/h after midnight. Winds could gust as high as 35 km/h.
Tuesday
Mostly sunny, with a high near -8. West wind 10 to 15 km/h, with gusts as high as 25 km/h.
Tuesday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around -12. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near -3.
Wednesday Night
Mostly cloudy, with a low around -14.
Thursday
Mostly sunny, with a high near -9.
Thursday Night
Mostly cloudy, with a low around -16.
Friday
A chance of snow. Partly sunny, with a high near -9.
Friday Night
A chance of snow. Mostly cloudy, with a low around -19.
Saturday
A chance of snow. Partly sunny and cold, with a high near -13.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.37°N 88.05°W
Last Update:
2:21 pm CST Jan 18, 2026
Forecast Valid:
2pm CST Jan 18, 2026-6pm CST Jan 24, 2026
 
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