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.

Fair

11°F

-12°C

Humidity 64%
Wind Speed NW 6 mph
Barometer 30.06 in (1020.0 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill1°F (-17°C)
Last update 17 Mar 6:51 am CDT
Extended Forecast for

Round Lake Heights IL

  • Today

    Today: Increasing clouds, with a high near 22. Wind chill values as low as -10. Northwest wind around 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 22 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow, mainly after 1am. Temperature falling to near 19 by 8pm, then rising to around 24 during the remainder of the night. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 19 °F⇑

    Chance Snow
    then Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 40. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 40 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind around 5 mph.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Partly sunny, with a high near 49. Southwest wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 10 mph.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 55.

    High: 55 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 22. Wind chill values as low as -10. Northwest wind around 10 mph becoming west southwest in the afternoon. Winds could gust as high as 15 mph.
Tonight
Snow, mainly after 1am. Temperature falling to near 19 by 8pm, then rising to around 24 during the remainder of the night. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Mostly cloudy, with a high near 40. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind around 5 mph.
Thursday
Partly sunny, with a high near 49. Southwest wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly cloudy, with a high near 55.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly cloudy, with a high near 53.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 42.
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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:
5:56 am CDT Mar 17, 2026
Forecast Valid:
7am CDT Mar 17, 2026-6pm CDT Mar 23, 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