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

73°F

23°C

Humidity 87%
Wind Speed SE 6 mph
Barometer 30.08 in (1017.6 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 15 Aug 4:51 am CDT
Extended Forecast for

Round Lake IL

  • Overnight

    Overnight: A 20 percent chance of showers. Cloudy, with a low around 68. East wind around 5 mph.

    Low: 68 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers, mainly before 2pm. Cloudy, with a high near 79. South southeast wind 5 to 10 mph.

    High: 79 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 71. South wind around 5 mph becoming west southwest after midnight. Chance of precipitation is 40%.

    Low: 71 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 9am. Partly sunny, with a high near 84. West northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. North wind 5 to 10 mph.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 81.

    High: 81 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a low around 68. East wind around 5 mph.
Saturday
A 40 percent chance of showers, mainly before 2pm. Cloudy, with a high near 79. South southeast wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 71. South wind around 5 mph becoming west southwest after midnight. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 9am. Partly sunny, with a high near 84. West northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 64. North wind 5 to 10 mph.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Partly sunny, with a high near 81.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65.
Wednesday
A chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 72.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake IL
 42.35°N 88.08°W
Last Update:
5:33 am CDT Aug 15, 2026
Forecast Valid:
5am CDT Aug 15, 2026-6pm CDT Aug 21, 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