Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

73°F

23°C

Humidity 79%
Wind Speed Vrbl 6 mph
Barometer 29.96 in (1013.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 19 Aug 11:51 am CDT
Extended Forecast for

Wonder Lake IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 78. North northeast wind around 5 mph.

    High: 78 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. East northeast wind around 5 mph becoming calm  in the evening.

    Low: 58 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming east southeast around 5 mph.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 78. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms.  Sunny, with a high near 78.

    High: 78 °F

    Slight Chance
    T-storms

  • Saturday Night

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

    Low: 58 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 78. North northeast wind around 5 mph.
Tonight
Partly cloudy, with a low around 58. East northeast wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 80. Calm wind becoming east southeast around 5 mph.
Thursday Night
Partly cloudy, with a low around 60. Southeast wind around 5 mph becoming calm.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 62.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 58.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Wonder Lake IL
 42.39°N 88.38°W
11:36 am CDT Aug 19, 2026
12pm CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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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