Hazardous Weather Conditions
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 Chill | 37°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
Tonight
Low: 32 °F
Slight Chance
Showers then
FrostSaturday

High: 51 °F
Areas Frost
then Mostly
SunnySaturday Night

Low: 40 °F
Partly Cloudy
Sunday

High: 64 °F
Slight Chance
Showers and
BreezySunday Night

Low: 45 °F
Partly Cloudy
Monday
High: 73 °F
Mostly Sunny
then Chance
ShowersMonday Night

Low: 45 °F
Chance
ShowersTuesday

High: 58 °F
Chance
ShowersTuesday Night

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.
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
2:41 pm CDT May 1, 2026
6pm CDT May 1, 2026-6pm CDT May 8, 2026



