National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Strong Storms and Heavy Rainfall Threats; Dangerous Heat for Southern Plains into the Southwest

Thunderstorms, some severe, will impact areas of the Plains into the Midwest today. Rainfall can be locally heavy as well from these storms with isolated instances of flash flooding. Monsoonal flow will enhance rainfall across the Four Corners into the central Rockies today. Meanwhile, summer heat continues for the southern Plains, Southwest into southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

74°F

23°C

Humidity 56%
Wind Speed SW 5 mph
Barometer 30.14 in (1019.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 10:51 am CDT
Extended Forecast for

Round Lake Beach IL

  • Today

    Today: Mostly sunny, with a high near 80. South southwest wind 5 to 10 mph.

    High: 80 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 2am. Increasing clouds, with a low around 63. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 82. South southwest wind 10 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. West northwest wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. North wind 5 to 10 mph.

    High: 79 °F

    Sunny

  • Thursday Night

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

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 80. South southwest wind 5 to 10 mph.
Tonight
A 20 percent chance of showers after 2am. Increasing clouds, with a low around 63. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between noon and 1pm. Mostly sunny, with a high near 82. South southwest wind 10 to 15 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 61. West northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 79. North wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Partly sunny, with a high near 80.
Saturday Night
Mostly cloudy, with a low around 65.
Sunday
A chance of showers. Partly sunny, with a high near 84.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 69.
Monday
A chance of showers. Partly sunny, with a high near 84.
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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:
9:31 am CDT Aug 25, 2026
Forecast Valid:
11am CDT Aug 25, 2026-6pm CDT Aug 31, 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