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.

Overcast

77°F

25°C

Humidity 62%
Wind Speed W 17 G 28 mph
Barometer 29.89 in (1011.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 May 1:51 pm CDT
Extended Forecast for

Round Lake Heights IL

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 73. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 73 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 57. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 57 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 42. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 58. East wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 58 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 60.

    High: 60 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Showers
    Likely

  • Saturday

    Saturday: Mostly cloudy, with a high near 69.

    High: 69 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 73. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 46. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 57. East northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 42. Northeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
Partly sunny, with a high near 58. East wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 60.
Friday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 48.
Saturday
Mostly cloudy, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 53.
Memorial Day
Mostly sunny, with a high near 77.
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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:
1:21 pm CDT May 19, 2026
Forecast Valid:
2pm CDT May 19, 2026-6pm CDT May 25, 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