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.

Overcast

50°F

10°C

Humidity 86%
Wind Speed W 10 G 26 mph
Barometer 29.84 in (1010.6 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 3 Apr 3:51 am CDT
Extended Forecast for

Grayslake IL

  • Today

    Today: Mostly cloudy, with a high near 58. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.

    High: 58 °F

    Mostly Cloudy

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after midnight. Low around 39. East northeast wind 10 to 15 mph becoming south southeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 39 °F

    T-storms
    Likely then
    T-storms

  • Saturday

    Saturday: A chance of showers before 1pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 59. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    High: 59 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 34 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 51. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 51 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Sunny

  • Sunday Night

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

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 58. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after midnight. Low around 39. East northeast wind 10 to 15 mph becoming south southeast after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A chance of showers before 1pm, then a slight chance of showers after 4pm. Mostly cloudy, with a high near 59. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 34. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Partly sunny, with a high near 51. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 25.
Tuesday
Mostly sunny, with a high near 42.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly cloudy, with a high near 62.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 47.
Thursday
A chance of showers. Mostly cloudy, with a high near 63.
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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:
3:51 am CDT Apr 3, 2026
Forecast Valid:
6am CDT Apr 3, 2026-6pm CDT Apr 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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