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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Light Rain

41°F

5°C

Humidity 82%
Wind Speed E 8 mph
Barometer 29.98 in (1016.2 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 30 Apr 3:51 pm CDT
Extended Forecast for

Grayslake IL

  • This Afternoon

    This Afternoon: Scattered showers. Mostly cloudy, with a steady temperature around 45. East wind around 10 mph. Chance of precipitation is 50%.

    High: 45 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers, mainly before midnight. Mostly cloudy, with a low around 37. East wind around 5 mph becoming north northwest after midnight. Chance of precipitation is 40%.

    Low: 37 °F

    Scattered
    Showers

  • Friday

    Friday: Isolated showers after 4pm. Partly sunny, with a high near 48. North northwest wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 20%.

    High: 48 °F

    Partly Sunny
    then Isolated
    Showers

  • Friday Night

    Friday Night: Isolated showers before 10pm. Widespread frost, mainly after 2am. Otherwise, partly cloudy, with a low around 33. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 33 °F

    Isolated
    Showers then
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 52. North wind 5 to 10 mph.

    High: 52 °F

    Areas Frost
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers before 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Scattered showers. Mostly cloudy, with a steady temperature around 45. East wind around 10 mph. Chance of precipitation is 50%.
Tonight
Scattered showers, mainly before midnight. Mostly cloudy, with a low around 37. East wind around 5 mph becoming north northwest after midnight. Chance of precipitation is 40%.
Friday
Isolated showers after 4pm. Partly sunny, with a high near 48. North northwest wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 20%.
Friday Night
Isolated showers before 10pm. Widespread frost, mainly after 2am. Otherwise, partly cloudy, with a low around 33. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 52. North wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 63.
Sunday Night
A chance of showers before 1am. Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 72.
Monday Night
A chance of showers. Partly cloudy, with a low around 47.
Tuesday
A chance of showers. Partly sunny, with a high near 62.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 41.
Wednesday
A chance of showers. Partly sunny, with a high near 57.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grayslake IL
 42.35°N 88.02°W
Last Update:
3:41 pm CDT Apr 30, 2026
Forecast Valid:
4pm CDT Apr 30, 2026-6pm CDT May 7, 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