Hazardous Weather Conditions
Current conditions at
Chicago/Waukegan Regional Airport (KUGN)
Lat: 42.43°NLon: 87.86°WElev: 709ft.
Fair
52°F
11°C
| Humidity | 21% |
| Wind Speed | SW 10 mph |
| Barometer | 29.56 in (1000.9 mb) |
| Dewpoint | 13°F (-11°C) |
| Visibility | 10.00 mi |
| Wind Chill | 49°F (9°C) |
| Last update | 18 Feb 5:51 pm CST |
Extended Forecast for
Grayslake IL
Red Flag Warning February 18, 06:02pm until February 18, 08:00pm
NOW until 8:00pm Wed
Red Flag Warning
Tonight
Low: 36 °F
Increasing
CloudsThursday
High: 52 °F
Mostly Sunny
then Chance
ShowersThursday Night
Low: 34 °F
Showers
Friday
High: 41 °F
Breezy.
Chance
Rain/Snow
then Mostly
CloudyFriday Night
Low: 26 °F
Mostly Cloudy
Saturday
High: 36 °F
Partly Sunny
Saturday Night
Low: 22 °F
Mostly Cloudy
then Slight
Chance SnowSunday
High: 31 °F
Mostly Cloudy
Detailed Forecast
Tonight
Increasing clouds, with a low around 36. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
A slight chance of showers between 2pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 52. East wind 5 to 10 mph. Chance of precipitation is 50%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then rain likely, mainly between midnight and 3am. Low around 34. East northeast wind 10 to 15 mph becoming west southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 41. Breezy, with a west wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, with a low around 26. West wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Partly sunny, with a high near 36.
Saturday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 22.
Sunday
Mostly cloudy, with a high near 31.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 18.
Tuesday
Partly sunny, with a high near 40.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 29.
Wednesday
A chance of rain. Mostly cloudy, with a high near 45.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grayslake IL
42.37°N 88.05°W
42.37°N 88.05°W
5:56 pm CST Feb 18, 2026
6pm CST Feb 18, 2026-6pm CST Feb 25, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
