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

60°F

16°C

Humidity 42%
Wind Speed W 15 G 23 mph
Barometer 30.14 in (1020.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 9 Apr 10:51 am CDT
Extended Forecast for

Grayslake IL

  • Today

    Today: Increasing clouds, with a high near 66. West northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 66 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers, mainly after 9pm. Low around 42. Southwest wind 5 to 10 mph becoming northeast in the evening. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 42 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind around 10 mph.

    High: 54 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 34. East northeast wind 5 to 10 mph becoming light east in the evening.

    Low: 34 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 54. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 73. Breezy.

    High: 73 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 62. Breezy.

    Low: 62 °F

    Showers
    Likely and
    Breezy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Increasing clouds, with a high near 66. West northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Tonight
Showers, mainly after 9pm. Low around 42. Southwest wind 5 to 10 mph becoming northeast in the evening. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
A 30 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 54. North wind around 10 mph.
Friday Night
Mostly clear, with a low around 34. East northeast wind 5 to 10 mph becoming light east in the evening.
Saturday
Mostly sunny, with a high near 54. East southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Chance of precipitation is 50%.
Sunday
A 40 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 73. Breezy.
Sunday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 62. Breezy.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 74.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 46.
Wednesday
A chance of showers. Mostly cloudy, with a high near 62.
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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:
5:17 am CDT Apr 9, 2026
Forecast Valid:
10am CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
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