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.

Overcast

34°F

1°C

Humidity 76%
Wind Speed N 17 G 30 mph
Barometer 29.96 in (1014.7 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 22 Mar 3:51 pm CDT
Extended Forecast for

Round Lake Heights IL

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 36. Breezy, with a north northeast wind around 20 mph, with gusts as high as 30 mph.

    High: 36 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 25. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 25 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 44. North wind around 5 mph becoming east northeast in the afternoon. Winds could gust as high as 10 mph.

    High: 44 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 28. Southeast wind around 5 mph.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 1pm. Mostly cloudy, with a high near 68.

    High: 68 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 36. Breezy, with a north northeast wind around 20 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 25. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 44. North wind around 5 mph becoming east northeast in the afternoon. Winds could gust as high as 10 mph.
Monday Night
Mostly cloudy, with a low around 28. Southeast wind around 5 mph.
Tuesday
Mostly cloudy, with a high near 52. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 44.
Thursday
A chance of showers after 1pm. Mostly cloudy, with a high near 68.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 41.
Friday Night
Mostly clear, with a low around 26.
Saturday
Sunny, with a high near 50.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
Mostly sunny, with a high near 56.
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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:
3:56 pm CDT Mar 22, 2026
Forecast Valid:
4pm CDT Mar 22, 2026-6pm CDT Mar 29, 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