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

54°F

12°C

Humidity 49%
Wind Speed SW 7 mph
Barometer 29.89 in (1012.5 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 15 Feb 11:51 am CST
Extended Forecast for

Round Lake Beach IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. West wind 5 to 10 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 61. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 61 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. West southwest wind around 5 mph becoming east after midnight.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 51. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 51 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.

    Low: 45 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday

    Wednesday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 62. Breezy.

    High: 62 °F

    Chance Rain
    then Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 54. West wind 5 to 10 mph.
Tonight
Increasing clouds, with a low around 34. Calm wind becoming south southwest around 5 mph after midnight. Winds could gust as high as 10 mph.
Washington's Birthday
Partly sunny, with a high near 61. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 37. West southwest wind around 5 mph becoming east after midnight.
Tuesday
Mostly cloudy, with a high near 51. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 45. Chance of precipitation is 70%.
Wednesday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 62. Breezy.
Wednesday Night
Partly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 50.
Thursday Night
A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 30.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 38.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Beach IL
 42.37°N 88.08°W
Last Update:
11:36 am CST Feb 15, 2026
Forecast Valid:
12pm CST Feb 15, 2026-6pm CST Feb 21, 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