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

63°F

17°C

Humidity 60%
Wind Speed N 13 G 21 mph
Barometer 30.05 in (1017.1 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 12 Jun 7:51 pm CDT
Extended Forecast for

McHenry IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 59. Northeast wind 5 to 10 mph.

    Low: 59 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 80. Northeast wind 5 to 10 mph becoming south southeast in the afternoon.

    High: 80 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 61. East northeast wind 5 to 10 mph.

    Low: 61 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78. East wind 5 to 10 mph.

    High: 78 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59. East wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 20%.

    Low: 62 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly cloudy, with a low around 59. Northeast wind 5 to 10 mph.
Friday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 80. Northeast wind 5 to 10 mph becoming south southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 61. East northeast wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 78. East wind 5 to 10 mph.
Saturday Night
Partly cloudy, with a low around 59. East wind around 5 mph becoming calm after midnight. Winds could gust as high as 10 mph.
Sunday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 83.
Sunday Night
A slight chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 20%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84.
Monday Night
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.
Tuesday
A chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 85.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Juneteenth
A chance of showers. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
2:26 pm CDT Jun 12, 2025
Forecast Valid:
8pm CDT Jun 12, 2025-6pm CDT Jun 19, 2025
 
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