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

60°F

16°C

Humidity 41%
Wind Speed SW 12 mph
Barometer 29.98 in (1015.6 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 12 May 11:51 am CDT
Extended Forecast for

Round Lake Beach IL

  • Today

    Today: Isolated showers and thunderstorms after noon. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.

    High: 79 °F

    Isolated
    T-storms and
    Breezy

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 48. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.

    Low: 48 °F

    Scattered
    T-storms and
    Breezy then
    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 61 °F

    Mostly Sunny
    and Breezy
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 40. North wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 15 mph.

    Low: 40 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 10 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.

    High: 77 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 56.

    Low: 56 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

Today
Isolated showers and thunderstorms after noon. Mostly cloudy, with a high near 79. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 20%.
Tonight
Scattered showers and thunderstorms, mainly before 9pm. Mostly cloudy during the early evening, then gradual clearing, with a low around 48. Breezy, with a west northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 61. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
Mostly clear, with a low around 40. North wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 15 mph.
Thursday
Sunny, with a high near 64. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 47.
Friday
A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Sunny, with a high near 83.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 80.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60.
Monday
A chance of showers. Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Round Lake Beach IL
 42.37°N 88.08°W
Last Update:
9:36 am CDT May 12, 2026
Forecast Valid:
11am CDT May 12, 2026-6pm CDT May 18, 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