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.

Fair

31°F

-1°C

Humidity 61%
Wind Speed E 7 mph
Barometer 30.43 in (1031.8 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 7 Apr 5:51 pm CDT
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: A chance of snow showers after 2am, mixing with rain after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Mostly Cloudy
    then Chance
    Wintry Mix

  • Wednesday

    Wednesday: A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 65. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.

    High: 65 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Increasing clouds, with a low around 48. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 62. West wind around 10 mph, with gusts as high as 20 mph.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers. Low around 40. North wind around 5 mph becoming east northeast in the evening. Chance of precipitation is 80%.

    Low: 40 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 52.

    High: 52 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 1am. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A chance of snow showers after 2am, mixing with rain after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph. Chance of precipitation is 30%.
Wednesday
A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 65. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.
Wednesday Night
Showers likely, mainly after 1am. Increasing clouds, with a low around 48. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Mostly sunny, with a high near 62. West wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Showers. Low around 40. North wind around 5 mph becoming east northeast in the evening. Chance of precipitation is 80%.
Friday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 52.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
A chance of showers after 1am. Mostly cloudy, with a low around 46.
Sunday
A chance of showers. Mostly cloudy, with a high near 76.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 61.
Monday
A chance of showers. Mostly cloudy, with a high near 77.
Monday Night
Showers likely. Mostly cloudy, with a low around 48.
Tuesday
Showers likely. Mostly cloudy, with a high near 66.
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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:
3:11 pm CDT Apr 7, 2026
Forecast Valid:
6pm CDT Apr 7, 2026-6pm CDT Apr 14, 2026
 
Forecast Discussion
 
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Additional Resources

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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