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

59°F

15°C

Humidity 35%
Wind Speed Vrbl 7 mph
Barometer 30.20 in (1022.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 9 May 3:51 pm CDT
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: Mostly clear, with a low around 49. East southeast wind 5 to 10 mph becoming west southwest after midnight.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68. West wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 30 mph.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68. East wind 5 to 10 mph.

    High: 68 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. East wind around 5 mph, with gusts as high as 10 mph.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Isolated showers and thunderstorms before 1am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Isolated
    T-storms

  • Tuesday

    Tuesday: Scattered showers and thunderstorms after 1pm. Partly sunny, with a high near 74.

    High: 74 °F

    Mostly Cloudy
    then
    Scattered
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 49. East southeast wind 5 to 10 mph becoming west southwest after midnight.
Saturday
Sunny, with a high near 68. West wind 5 to 15 mph becoming northeast in the afternoon. Winds could gust as high as 30 mph.
Saturday Night
Clear, with a low around 39. North northeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 68. East wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 50. East wind around 5 mph, with gusts as high as 10 mph.
Monday
Mostly sunny, with a high near 74.
Monday Night
Isolated showers and thunderstorms before 1am. Mostly cloudy, with a low around 57. Chance of precipitation is 20%.
Tuesday
Scattered showers and thunderstorms after 1pm. Partly sunny, with a high near 74.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Scattered showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
Sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.33°N 88.03°W
Last Update:
3:26 pm CDT May 9, 2025
Forecast Valid:
4pm CDT May 9, 2025-6pm CDT May 16, 2025
 
Forecast Discussion
 
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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