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

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

40°F

4°C

Humidity 86%
Wind Speed NW 3 mph
Barometer 29.97 in (1015.0 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 11 Nov 1:51 am CST
Extended Forecast for

Round Lake Heights IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 42. Calm wind.

    Low: 42 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: Showers likely, mainly before 4pm. Cloudy, with a high near 52. Light and variable wind becoming north northeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 3am. Mostly cloudy, with a low around 38. North northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 40 percent chance of showers. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 30 mph.

    High: 45 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 29. North northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 42. Calm wind.
Veterans Day
Showers likely, mainly before 4pm. Cloudy, with a high near 52. Light and variable wind becoming north northeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 30 percent chance of showers after 3am. Mostly cloudy, with a low around 38. North northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Thursday
A 40 percent chance of showers. Mostly cloudy, with a high near 45. North wind around 15 mph, with gusts as high as 30 mph.
Thursday Night
Partly cloudy, with a low around 29. North northwest wind around 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 44.
Friday Night
Mostly clear, with a low around 26.
Saturday
Sunny, with a high near 46.
Saturday Night
Mostly clear, with a low around 27.
Sunday
Mostly sunny, with a high near 48.
Sunday Night
Partly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 49.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Sunny, with a high near 51.
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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:
1:55 am CST Nov 11, 2026
Forecast Valid:
2am CST Nov 11, 2026-6pm CST Nov 17, 2026
 
Forecast Discussion
 
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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