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.

Fair

44°F

7°C

Humidity 45%
Wind Speed W 3 mph
Barometer 29.70 in (1006.9 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 27 Feb 6:51 pm CST
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: Mostly clear, with a low around 27. West southwest wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of snow, mainly between noon and 3pm. Mostly cloudy, with a high near 34. North northwest wind 5 to 10 mph becoming east northeast in the morning. Winds could gust as high as 15 mph.

    High: 34 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before 9pm. Mostly cloudy, with a low around 21. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 30. North northeast wind 5 to 10 mph.

    High: 30 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 20. East northeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 20 °F

    Slight Chance
    Snow

  • Monday

    Monday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain. Cloudy, with a high near 41.

    High: 41 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before midnight. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 27. West southwest wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.
Saturday
A 30 percent chance of snow, mainly between noon and 3pm. Mostly cloudy, with a high near 34. North northwest wind 5 to 10 mph becoming east northeast in the morning. Winds could gust as high as 15 mph.
Saturday Night
A 20 percent chance of snow before 9pm. Mostly cloudy, with a low around 21. North wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, with a high near 30. North northeast wind 5 to 10 mph.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 20. East northeast wind around 5 mph, with gusts as high as 10 mph.
Monday
Partly sunny, with a high near 38.
Monday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 30.
Tuesday
A chance of rain. Cloudy, with a high near 41.
Tuesday Night
A chance of rain before midnight. Mostly cloudy, with a low around 31.
Wednesday
A chance of rain after noon. Partly sunny, with a high near 46.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 36.
Thursday
Rain likely. Cloudy, with a high near 50.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 38.
Friday
A chance of rain. Cloudy, with a high near 54.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
6:06 pm CST Feb 27, 2026
Forecast Valid:
6pm CST Feb 27, 2026-6pm CST Mar 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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