Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

42°F

6°C

Humidity 53%
Wind Speed NE 8 mph
Barometer 30.06 in (1018.8 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 1 May 5:51 pm CDT
Extended Forecast for

Grayslake IL

Frost Advisory May 2, 01:00am until May 2, 08:00am
Click here for hazard details and duration
Frost Advisory
  • Tonight

    Tonight: A 20 percent chance of showers before 7pm.  Widespread frost, mainly after 2am.  Otherwise, partly cloudy, with a low around 32. East northeast wind around 5 mph becoming calm  in the evening.

    Low: 32 °F

    Slight Chance
    Showers then
    Frost

  • Saturday

    Saturday: Areas of frost before 9am.  Otherwise, mostly sunny, with a high near 51. North northwest wind 5 to 10 mph becoming northeast in the afternoon.

    High: 51 °F

    Areas Frost
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 40. South southeast wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers.  Mostly cloudy, with a high near 64. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 64 °F

    Slight Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45. West wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 45. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers.  Mostly cloudy, with a high near 58.

    High: 58 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers before 1am.  Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers before 7pm. Widespread frost, mainly after 2am. Otherwise, partly cloudy, with a low around 32. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Areas of frost before 9am. Otherwise, mostly sunny, with a high near 51. North northwest wind 5 to 10 mph becoming northeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 40. South southeast wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Sunday
A 20 percent chance of showers. Mostly cloudy, with a high near 64. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 45. West wind 5 to 10 mph, with gusts as high as 15 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 58.
Tuesday Night
A chance of showers before 1am. Mostly cloudy, with a low around 40.
Wednesday
Partly sunny, with a high near 56.
Wednesday Night
Mostly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 57.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Mostly sunny, with a high near 63.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
2:41 pm CDT May 1, 2026
6pm CDT May 1, 2026-6pm CDT May 8, 2026
 
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Additional Resources

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