Hazardous Weather Conditions
Current conditions at
Chicago/Waukegan Regional Airport (KUGN)
Lat: 42.43°NLon: 87.86°WElev: 709ft.
Fair
60°F
16°C
| Humidity | 90% |
| Wind Speed | SW 18 mph |
| Barometer | 29.68 in (1005.3 mb) |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Last update | 2 Apr 11:51 pm CDT |
Extended Forecast for
Grayslake IL
Overnight

Low: 45 °F
Mostly Cloudy
and BreezyFriday

High: 58 °F
Partly Sunny
Friday Night

Low: 39 °F
Showers
Saturday

High: 59 °F
Chance
Showers and
BreezySaturday Night
Low: 34 °F
Mostly Cloudy
and Breezy
then Mostly
CloudySunday

High: 51 °F
Partly Sunny
Sunday Night

Low: 35 °F
Partly Cloudy
Monday

High: 48 °F
Partly Sunny
Monday Night

Low: 27 °F
Partly Cloudy
Detailed Forecast
Overnight
Mostly cloudy, with a low around 45. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Partly sunny, with a high near 58. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Showers and possibly a thunderstorm. 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 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 40 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 59. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph.
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.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 48.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 29.
Wednesday
Mostly cloudy, with a high near 58. Breezy.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 46.
Thursday
A chance of showers. Partly sunny, with a high near 63.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Grayslake IL
42.35°N 88.02°W
42.35°N 88.02°W
12:01 am CDT Apr 3, 2026
12am CDT Apr 3, 2026-6pm CDT Apr 9, 2026



