Hazardous Weather Conditions
Current conditions at
Chicago/Waukegan Regional Airport (KUGN)
Lat: 42.43°NLon: 87.86°WElev: 709ft.
Fair
62°F
17°C
| Humidity | 90% |
| Wind Speed | SW 13 mph |
| Barometer | 29.60 in (1001.6 mb) |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 18 Apr 12:51 am CDT |
Extended Forecast for
Third Lake IL
Flood Watch April 18, 01:19am until April 18, 05:00am
Flash Flood Warning April 18, 01:19am until April 18, 02:00am
NOW: Multiple hazards in effect

Click HERE for Details
Overnight

Low: 42 °F
Showers and
BreezySaturday

High: 46 °F
Decreasing
Clouds and
BreezySaturday Night

Low: 33 °F
Mostly Clear
then FrostSunday
High: 49 °F
Frost then
Slight Chance
ShowersSunday Night

Low: 31 °F
Partly Cloudy
then FrostMonday

High: 52 °F
Frost then
Mostly SunnyMonday Night

Low: 41 °F
Mostly Cloudy
Tuesday

High: 70 °F
Mostly Sunny
Detailed Forecast
Overnight
Showers, mainly before 3am. Low around 42. Breezy, with a southwest wind 15 to 20 mph becoming west northwest. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Cloudy, then gradually becoming mostly sunny, with a steady temperature around 46. Breezy, with a west wind around 20 mph, with gusts as high as 30 mph.
Saturday Night
Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 33. West wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers after 1pm. Widespread frost before 7am. Otherwise, mostly sunny, with a high near 49. West southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Sunday Night
Widespread frost after 1am. Otherwise, partly cloudy, with a low around 31. North northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 15 mph.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 52.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 57.
Friday
A chance of showers. Mostly cloudy, with a high near 72.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Third Lake IL
42.37°N 87.99°W
42.37°N 87.99°W
12:17 am CDT Apr 18, 2026
1am CDT Apr 18, 2026-6pm CDT Apr 24, 2026



