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.

Mostly Cloudy

46°F

8°C

Humidity 51%
Wind Speed NW 15 G 29 mph
Barometer 30.21 in (1023.5 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 6 Apr 12:51 pm CDT
Extended Forecast for

Grayslake IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 46. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.

    High: 46 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and 4am. Mostly cloudy, with a low around 25. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Tuesday

    Tuesday: Sunny, with a high near 36. North northeast wind around 10 mph becoming east in the afternoon.

    High: 36 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A 10 percent chance of showers before 7am. Partly sunny, with a high near 62. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 62 °F

    Breezy.
    Slight Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 67.

    High: 67 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 46. Breezy, with a northwest wind around 20 mph, with gusts as high as 30 mph.
Tonight
A slight chance of rain showers before 8pm, then a slight chance of snow showers between 8pm and 4am. Mostly cloudy, with a low around 25. North northeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
Sunny, with a high near 36. North northeast wind around 10 mph becoming east in the afternoon.
Tuesday Night
A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph. Chance of precipitation is 20%.
Wednesday
A 10 percent chance of showers before 7am. Partly sunny, with a high near 62. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A 30 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 67.
Thursday Night
Showers likely. Mostly cloudy, with a low around 43.
Friday
A chance of showers. Mostly cloudy, with a high near 56.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 45.
Sunday
A chance of showers. Mostly cloudy, with a high near 75.
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:
1:21 pm CDT Apr 6, 2026
Forecast Valid:
1pm CDT Apr 6, 2026-6pm CDT Apr 12, 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