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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

62°F

17°C

Humidity 96%
Wind Speed NE 6 mph
Barometer 29.93 in (1012.7 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 14 Oct 12:51 am CDT
Extended Forecast for

Grayslake IL

  • Overnight

    Overnight: A 40 percent chance of showers and thunderstorms, mainly before 4am. Mostly cloudy, with a low around 58. Calm wind becoming north northeast around 5 mph.

    Low: 58 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 65. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 65 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 54. North northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 7am. High near 61. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.

    High: 61 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely before 1am. Cloudy, with a low around 44. Breezy, with an east southeast wind 5 to 10 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.

    Low: 44 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 56. Breezy.

    High: 56 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Patchy frost after 3am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 59.

    High: 59 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers and thunderstorms, mainly before 4am. Mostly cloudy, with a low around 58. Calm wind becoming north northeast around 5 mph.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 65. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly cloudy, with a low around 54. North northeast wind around 10 mph, with gusts as high as 15 mph.
Thursday
Showers, mainly after 7am. High near 61. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely before 1am. Cloudy, with a low around 44. Breezy, with an east southeast wind 5 to 10 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 56. Breezy.
Friday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 35.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Partly sunny, with a high near 67.
Monday Night
Mostly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
9:46 pm CDT Oct 13, 2026
Forecast Valid:
1am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation