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

10°F

-12°C

Humidity 53%
Wind Speed W 15 G 22 mph
Barometer 30.35 in (1030.7 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-7°F (-22°C)
Last update 20 Jan 10:51 am CST
Extended Forecast for

Round Lake Heights IL

Winter Weather Advisory January 20, 08:00pm until January 21, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Increasing clouds, with a high near 18. Wind chill values as low as -3. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 18 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Snow, mainly after 11pm. Temperature rising to around 20 by 5am. South wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 15 °F⇑

    Snow Likely
    then Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow before 9am. Mostly cloudy, with a high near 26. West wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 26 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Snow showers likely before midnight. Patchy blowing snow before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -3. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 10 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 18. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 18 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -10.

    Low: -10 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -2.

    High: -2 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -11.

    Low: -11 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near 4.

    High: 4 °F

    Cold

Detailed Forecast

Today
Increasing clouds, with a high near 18. Wind chill values as low as -3. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
Snow, mainly after 11pm. Temperature rising to around 20 by 5am. South wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Wednesday
A 30 percent chance of snow before 9am. Mostly cloudy, with a high near 26. West wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Snow showers likely before midnight. Patchy blowing snow before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -3. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday
Mostly sunny, with a high near 18. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around -10.
Friday
Mostly sunny and cold, with a high near -2.
Friday Night
Partly cloudy, with a low around -11.
Saturday
Mostly cloudy and cold, with a high near 4.
Saturday Night
A chance of snow. Mostly cloudy, with a low around -5.
Sunday
Mostly sunny, with a high near 14.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Mostly sunny, with a high near 14.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
8:51 am CST Jan 20, 2026
Forecast Valid:
11am CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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