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

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

84°F

29°C

Humidity 43%
Wind Speed W 8 mph
Barometer 30.07 in (1017.2 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 30 Jul 1:51 pm CDT
Extended Forecast for

Wonder Lake IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 85. Southwest wind around 5 mph, with gusts as high as 10 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 63. South southwest wind around 5 mph becoming calm after midnight.

    Low: 63 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely, mainly after 4pm. Increasing clouds, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 79 °F

    Partly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers likely, then showers and possibly a thunderstorm after 10pm. Low around 64. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 64 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 73. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

    High: 73 °F

    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 61.

    Low: 61 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 85. Southwest wind around 5 mph, with gusts as high as 10 mph.
Tonight
Mostly cloudy, with a low around 63. South southwest wind around 5 mph becoming calm after midnight.
Friday
Showers likely, mainly after 4pm. Increasing clouds, with a high near 79. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers likely, then showers and possibly a thunderstorm after 10pm. Low around 64. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. High near 73. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, with a low around 61.
Sunday
Partly sunny, with a high near 76.
Sunday Night
Mostly clear, with a low around 57.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 64.
Wednesday
A chance of showers. Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Wonder Lake IL
 42.39°N 88.38°W
Last Update:
2:46 pm CDT Jul 30, 2026
Forecast Valid:
2pm CDT Jul 30, 2026-6pm CDT Aug 5, 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