Current conditions at
Chicago/Waukegan Regional Airport (KUGN)
Lat: 42.43°NLon: 87.86°WElev: 709ft.
Fair
73°F
23°C
| Humidity | 69% |
| Wind Speed | SE 6 mph |
| Barometer | 29.98 in (1014.5 mb) |
| Dewpoint | 62°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 3 Aug 6:51 pm CDT |
Extended Forecast for
Grayslake IL
Tonight
Low: 63 °F
Mostly Clear
Tuesday
High: 82 °F
Mostly Sunny
Tuesday Night
Low: 68 °F
Partly Cloudy
then Chance
ShowersWednesday
High: 74 °F
Showers
LikelyWednesday Night
Low: 64 °F
Showers
Thursday
High: 76 °F
Chance
ShowersThursday Night
Low: 57 °F
Partly Cloudy
Friday
High: 80 °F
Sunny
Friday Night
Low: 61 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly clear, with a low around 63. East southeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 68. South southwest wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Showers likely and possibly a thunderstorm before 10am, then showers likely between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Cloudy through mid morning, then becoming mostly sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%.
Wednesday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 64. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 76. Chance of precipitation is 50%.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Monday
A chance of showers. Partly sunny, with a high near 82.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Grayslake IL
42.33°N 88.05°W
42.33°N 88.05°W
1:21 pm CDT Aug 3, 2026
7pm CDT Aug 3, 2026-6pm CDT Aug 10, 2026
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