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

26°F

-3°C

Humidity 46%
Wind Speed Calm
Barometer 29.78 in (1010.1 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Last update 25 Feb 6:51 pm CST
Extended Forecast for

Round Lake Heights IL

  • Tonight

    Tonight: Partly cloudy, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.

    Low: 17 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 41. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 41 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. Southwest wind 5 to 10 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 59. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 59 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 28. West southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.

    Low: 28 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow, mainly after noon. Cloudy, with a high near 35.

    High: 35 °F

    Slight Chance
    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of snow before midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 17. Northwest wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 41. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 30. Southwest wind 5 to 10 mph.
Friday
Sunny, with a high near 59. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 28. West southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 20 mph.
Saturday
A 50 percent chance of snow, mainly after noon. Cloudy, with a high near 35.
Saturday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Sunday
Mostly cloudy, with a high near 29.
Sunday Night
A chance of snow before midnight. Mostly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 34.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 40.
Tuesday Night
Mostly clear, with a low around 26.
Wednesday
Sunny, with a high near 46.
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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:
7:46 pm CST Feb 25, 2026
Forecast Valid:
7pm CST Feb 25, 2026-6pm CST Mar 4, 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