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

43°F

6°C

Humidity 86%
Wind Speed NW 7 G 20 mph
Barometer 29.70 in (1006.3 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 26 Dec 12:51 pm CST
Extended Forecast for

Grayslake IL

  • This Afternoon

    This Afternoon: Cloudy, with a high near 44. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 44 °F

    Cloudy

  • Tonight

    Tonight: Patchy fog after 10pm. Otherwise, cloudy, with a low around 36. Northwest wind around 5 mph becoming calm in the evening.

    Low: 36 °F

    Patchy Fog

  • Saturday

    Saturday: Areas of fog before 11am. Otherwise, cloudy, with a high near 44. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 44 °F

    Areas Fog
    then Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Cloudy, with a low around 40. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after noon. Cloudy, with a high near 54. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    High: 54 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers likely before 9pm, then rain and snow showers likely between 9pm and 3am, then a chance of snow showers after 3am. Cloudy, with a low around 20. Blustery. Chance of precipitation is 60%.

    Low: 20 °F

    Rain/Snow
    Likely and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow showers before noon. Mostly cloudy, with a high near 26. Blustery.

    High: 26 °F

    Blustery.
    Chance Snow
    Showers then
    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. Blustery.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Cloudy, with a high near 44. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
Patchy fog after 10pm. Otherwise, cloudy, with a low around 36. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Areas of fog before 11am. Otherwise, cloudy, with a high near 44. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A 40 percent chance of showers. Cloudy, with a low around 40. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Showers likely, mainly after noon. Cloudy, with a high near 54. South wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Sunday Night
Rain showers likely before 9pm, then rain and snow showers likely between 9pm and 3am, then a chance of snow showers after 3am. Cloudy, with a low around 20. Blustery. Chance of precipitation is 60%.
Monday
A 30 percent chance of snow showers before noon. Mostly cloudy, with a high near 26. Blustery.
Monday Night
Partly cloudy, with a low around 13. Blustery.
Tuesday
Partly sunny, with a high near 29.
Tuesday Night
Mostly cloudy, with a low around 19.
Wednesday
Mostly cloudy, with a high near 26.
Wednesday Night
Mostly cloudy, with a low around 9.
New Year's Day
Mostly sunny, with a high near 20.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.33°N 88.03°W
Last Update:
12:20 pm CST Dec 26, 2025
Forecast Valid:
1pm CST Dec 26, 2025-6pm CST Jan 1, 2026
 
Forecast Discussion
 
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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