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.

Light Snow

17°F

-8°C

Humidity 74%
Wind Speed W 13 G 26 mph
Barometer 29.74 in (1008.4 mb)
Dewpoint 10°F (-12°C)
Visibility 7.00 mi
Wind Chill3°F (-16°C)
Last update 17 Jan 2:51 am CST
Extended Forecast for

Grayslake IL

  • Overnight

    Overnight: A chance of flurries. Mostly cloudy, with a low around 14. Wind chill values as low as -1. West wind around 15 mph, with gusts as high as 25 mph.

    Low: 14 °F

    Chance
    Flurries

  • Saturday

    Saturday: A slight chance of flurries before 7am, then snow, mainly after 1pm. High near 19. Wind chill values as low as -1. West southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 19 °F

    Chance Snow
    then Snow

  • Saturday Night

    Saturday Night: Snow, mainly before 9pm, then a slight chance of flurries after midnight. Low around 8. Wind chill values as low as -6. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 8 °F

    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Snow likely after noon. Mostly cloudy, with a high near 18. Wind chill values as low as -8. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 18 °F

    Partly Sunny
    then Snow
    Likely

  • Sunday Night

    Sunday Night: Snow likely before midnight. Mostly cloudy, with a low around 2. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

    Low: 2 °F

    Snow Likely
    then Mostly
    Cloudy and
    Blustery

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 8. Blustery.

    High: 8 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -1.

    Low: -1 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow

Detailed Forecast

Overnight
A chance of flurries. Mostly cloudy, with a low around 14. Wind chill values as low as -1. West wind around 15 mph, with gusts as high as 25 mph.
Saturday
A slight chance of flurries before 7am, then snow, mainly after 1pm. High near 19. Wind chill values as low as -1. West southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday Night
Snow, mainly before 9pm, then a slight chance of flurries after midnight. Low around 8. Wind chill values as low as -6. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday
Snow likely after noon. Mostly cloudy, with a high near 18. Wind chill values as low as -8. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow likely before midnight. Mostly cloudy, with a low around 2. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.
M.L.King Day
Partly sunny and cold, with a high near 8. Blustery.
Monday Night
Partly cloudy, with a low around -1.
Tuesday
Mostly sunny, with a high near 22.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 14.
Wednesday
Mostly cloudy, with a high near 28.
Wednesday Night
Mostly cloudy, with a low around 9.
Thursday
Partly sunny, with a high near 18.
Thursday Night
Mostly cloudy, with a low around 5.
Friday
Partly sunny, with a high near 20.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
3:06 am CST Jan 17, 2026
Forecast Valid:
3am CST Jan 17, 2026-6pm CST Jan 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation