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

61°F

16°C

Humidity 72%
Wind Speed Calm
Barometer 30.32 in (1026.7 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 25 Oct 5:51 pm CDT
Extended Forecast for

Round Lake ILSimilar City Names

  • Tonight

    Tonight: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. South wind around 5 mph becoming calm. Winds could gust as high as 10 mph.

    Low: 51 °F

    Partly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Mostly cloudy, with a high near 61. Northeast wind 10 to 15 mph.

    High: 61 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 47. Northeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 47 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. Southeast wind around 10 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 54. Southeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 54 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers before 1pm. Partly sunny, with a high near 74.

    High: 74 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 51. South wind around 5 mph becoming calm. Winds could gust as high as 10 mph.
Monday
Mostly cloudy, with a high near 61. Northeast wind 10 to 15 mph.
Monday Night
Mostly cloudy, with a low around 47. Northeast wind around 10 mph, with gusts as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 65. Southeast wind around 10 mph.
Tuesday Night
Mostly cloudy, with a low around 54. Southeast wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 56.
Thursday
A chance of showers before 1pm. Partly sunny, with a high near 74.
Thursday Night
Mostly cloudy, with a low around 53.
Friday
A chance of showers. Mostly cloudy, with a high near 72.
Friday Night
A chance of showers. Mostly cloudy, with a low around 55.
Saturday
A chance of showers. Mostly cloudy, with a high near 70.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 54.
Sunday
A chance of showers. Cloudy, with a high near 68.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake ILSimilar City Names
 42.35°N 88.11°W
Last Update:
5:51 pm CDT Oct 25, 2026
Forecast Valid:
6pm CDT Oct 25, 2026-6pm CST Nov 1, 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