National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Freezing Fog

30°F

-1°C

Humidity 100%
Wind Speed N 5 mph
Barometer 30.21 in (1024.1 mb)
Dewpoint 30°F (-1°C)
Visibility 0.25 mi
Wind Chill25°F (-4°C)
Last update 4 Mar 2:51 am CST
Extended Forecast for

Round Lake Heights IL

Dense Fog Advisory March 4, 03:19am until March 4, 09:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory March 4, 03:19am until March 4, 09:00am

    NOW until 9:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 31 °F

    Dense Fog

  • Wednesday

    Wednesday: Widespread dense fog, mainly before 7am. Otherwise, mostly cloudy, with a high near 45. East wind 5 to 10 mph.

    High: 45 °F

    Dense Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers, mainly after 1am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 39. Northeast wind around 5 mph.

    Low: 39 °F

    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm before noon, then a chance of showers. Areas of fog. High near 46. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.

    High: 46 °F

    Showers and
    Areas Fog
    then Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog. Otherwise, cloudy, with a low around 40. Northeast wind around 5 mph becoming southeast after midnight.

    Low: 40 °F

    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. Patchy fog before noon. High near 69. Chance of precipitation is 90%.

    High: 69 °F

    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: A slight chance of showers, then showers and possibly a thunderstorm after 9pm. Low around 49. Chance of precipitation is 90%.

    Low: 49 °F

    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

Detailed Forecast

Overnight
Widespread dense fog. Otherwise, mostly cloudy, with a low around 31. East northeast wind around 5 mph.
Wednesday
Widespread dense fog, mainly before 7am. Otherwise, mostly cloudy, with a high near 45. East wind 5 to 10 mph.
Wednesday Night
A 50 percent chance of showers, mainly after 1am. Patchy fog after 9pm. Otherwise, cloudy, with a low around 39. Northeast wind around 5 mph.
Thursday
Showers and possibly a thunderstorm before noon, then a chance of showers. Areas of fog. High near 46. Northeast wind 5 to 10 mph. Chance of precipitation is 80%.
Thursday Night
Patchy fog. Otherwise, cloudy, with a low around 40. Northeast wind around 5 mph becoming southeast after midnight.
Friday
Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. Patchy fog before noon. High near 69. Chance of precipitation is 90%.
Friday Night
A slight chance of showers, then showers and possibly a thunderstorm after 9pm. Low around 49. Chance of precipitation is 90%.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly clear, with a low around 35.
Sunday
Mostly sunny, with a high near 60. Breezy.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Showers likely. Partly sunny, with a high near 68. Breezy.
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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:
2:51 am CST Mar 4, 2026
Forecast Valid:
3am CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation