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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fog

46°F

8°C

Humidity 100%
Wind Speed Calm
Barometer 29.95 in (1014.0 mb)
Dewpoint 46°F (8°C)
Visibility 0.50 mi
Last update 16 Apr 10:51 pm CDT
Extended Forecast for

Round Lake Heights IL

Dense Fog Advisory April 16, 11:50pm until April 17, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory April 16, 11:50pm until April 17, 10:00am

    NOW until 10:00am Fri

    Dense Fog Advisory

  • Tonight

    Low: 48 °F

    Dense Fog

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 4pm. Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 80. Breezy, with a south southeast wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 80 °F

    Dense Fog
    then Slight
    Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Low around 42. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 42 °F

    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 53. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 53 °F

    Slight Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 1am. Otherwise, mostly clear, with a low around 30.

    Low: 30 °F

    Partly Cloudy
    then Areas
    Frost

  • Monday

    Monday: Areas of frost before 9am. Otherwise, sunny, with a high near 56.

    High: 56 °F

    Areas Frost
    then Sunny

Detailed Forecast

Tonight
Widespread dense fog. Otherwise, mostly cloudy, with a low around 48. East southeast wind around 5 mph.
Friday
A 20 percent chance of showers and thunderstorms after 4pm. Widespread dense fog, mainly before 8am. Otherwise, partly sunny, with a high near 80. Breezy, with a south southeast wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Friday Night
Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Low around 42. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 53. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 33. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Areas of frost after 1am. Otherwise, mostly clear, with a low around 30.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
9:45 pm CDT Apr 16, 2026
Forecast Valid:
11pm CDT Apr 16, 2026-6pm CDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation