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.

Mostly Cloudy

41°F

5°C

Humidity 39%
Wind Speed SW 12 mph
Barometer 29.84 in (1012.0 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 26 Feb 3:51 pm CST
Extended Forecast for

Round Lake IL

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 28. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 60. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 60 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon. Mostly cloudy, with a high near 33. North wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    High: 33 °F

    Snow Likely

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind around 5 mph, with gusts as high as 20 mph.

    Low: 17 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 30.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Chance Snow

  • Monday

    Monday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 28. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Sunny, with a high near 60. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
Partly cloudy, with a low around 28. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
Snow likely, mainly after noon. Mostly cloudy, with a high near 33. North wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Saturday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 17. North wind around 5 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 30.
Sunday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 23.
Tuesday
A chance of rain and snow after noon. Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
A chance of rain. Mostly cloudy, with a high near 47.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 35.
Thursday
Rain likely. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake IL
 42.35°N 88.11°W
Last Update:
4:36 pm CST Feb 26, 2026
Forecast Valid:
4pm CST Feb 26, 2026-6pm CST Mar 5, 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