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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Round Lake IL

  • Overnight

    Overnight: Mostly clear, with a low around 52. West northwest wind around 5 mph.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76. Northwest wind around 5 mph, with gusts as high as 10 mph.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. East northeast wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 79. Light southwest wind becoming south southwest 5 to 10 mph in the morning.

    High: 79 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62. South wind 5 to 10 mph.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 82. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of thunderstorms before 7pm. Mostly clear, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 52. West northwest wind around 5 mph.
Monday
Sunny, with a high near 76. Northwest wind around 5 mph, with gusts as high as 10 mph.
Monday Night
Mostly clear, with a low around 55. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 79. Light southwest wind becoming south southwest 5 to 10 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 62. South wind 5 to 10 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Wednesday Night
A chance of thunderstorms before 7pm. Mostly clear, with a low around 61. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Partly sunny, with a high near 80.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 64.
Sunday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake IL
 42.33°N 88.11°W
Last Update:
1:11 am CDT Aug 24, 2026
Forecast Valid:
2am CDT Aug 24, 2026-6pm CDT Aug 30, 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