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

36°F

2°C

Humidity 86%
Wind Speed W 3 mph
Barometer 29.92 in (1013.8 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 20 Mar 12:51 am CDT
Extended Forecast for

Round Lake Heights IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 38 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 57. West southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming east southeast after midnight.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62. South southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 47 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
Partly sunny, with a high near 57. West southwest wind around 10 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 37. North northeast wind around 5 mph becoming east southeast after midnight.
Saturday
Mostly sunny, with a high near 62. South southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Partly cloudy, with a low around 47. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly cloudy, with a high near 60.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 45.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 51.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
A chance of showers. Partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Heights IL
 42.38°N 88.11°W
Last Update:
9:11 pm CDT Mar 19, 2026
Forecast Valid:
1am CDT Mar 20, 2026-6pm CDT Mar 26, 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