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 and Breezy

69°F

21°C

Humidity 35%
Wind Speed SW 24 G 37 mph
Barometer 30.00 in (1016.0 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 8 Apr 3:51 pm CDT
Extended Forecast for

Grayslake IL

  • Tonight

    Tonight: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 49. Breezy, with a south wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Breezy.
    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 63. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 63 °F

    Chance
    Showers then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers, mainly after 7pm. Low around 41. North northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 41 °F

    Showers

  • Friday

    Friday: Showers likely, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 52. North wind 5 to 10 mph. Chance of precipitation is 60%.

    High: 52 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 33. East northeast wind around 5 mph.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.

    Low: 46 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers after 1pm. Mostly cloudy, with a high near 75.

    High: 75 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Tonight
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 49. Breezy, with a south wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 63. West wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Showers, mainly after 7pm. Low around 41. North northwest wind around 5 mph becoming east northeast after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Showers likely, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 52. North wind 5 to 10 mph. Chance of precipitation is 60%.
Friday Night
Mostly clear, with a low around 33. East northeast wind around 5 mph.
Saturday
Mostly sunny, with a high near 54.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. Chance of precipitation is 40%.
Sunday
A chance of showers after 1pm. Mostly cloudy, with a high near 75.
Sunday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 63.
Monday
A chance of showers. Mostly cloudy, with a high near 77.
Monday Night
Showers likely. Mostly cloudy, with a low around 57.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 39.
Wednesday
A chance of showers. Mostly cloudy, with a high near 51.
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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:
2:41 pm CDT Apr 8, 2026
Forecast Valid:
4pm CDT Apr 8, 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