Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

75°F

24°C

Humidity 66%
Wind Speed SE 7 mph
Barometer 30.01 in (1015.5 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 27 Aug 4:51 pm CDT
Extended Forecast for

Wonder Lake IL

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 58. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 58 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am.  Otherwise, sunny, with a high near 82. Calm wind becoming west southwest around 5 mph in the morning.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 60. South southwest wind around 5 mph becoming calm  in the evening.

    Low: 60 °F

    Partly Cloudy

  • Saturday

    Saturday: Increasing clouds, with a high near 80. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 80 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 10pm.  Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm.  Partly sunny, with a high near 86. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 71.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday

    Monday: Mostly cloudy, with a high near 87.

    High: 87 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 72.

    Low: 72 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly clear, with a low around 58. North northeast wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 8am. Otherwise, sunny, with a high near 82. Calm wind becoming west southwest around 5 mph in the morning.
Friday Night
Partly cloudy, with a low around 60. South southwest wind around 5 mph becoming calm in the evening.
Saturday
Increasing clouds, with a high near 80. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A chance of showers, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Sunday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Partly sunny, with a high near 86. Chance of precipitation is 20%.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71.
Monday
Mostly cloudy, with a high near 87.
Monday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 72.
Tuesday
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 87.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 70.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 69.
Thursday
A chance of showers. Mostly sunny, with a high near 85.
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ABOUT THIS FORECAST

 
Point Forecast:
Wonder Lake IL
 42.39°N 88.38°W
2:51 pm CDT Aug 27, 2026
5pm CDT Aug 27, 2026-6pm CDT Sep 3, 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