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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

67°F

19°C

Humidity 97%
Wind Speed N 6 mph
Barometer 29.96 in (1013.5 mb)
Dewpoint 66°F (19°C)
Visibility 7.00 mi
Last update 4 Jul 8:51 pm CDT
Extended Forecast for

McHenry IL

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. North northeast wind around 5 mph.

    Low: 63 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 4pm. Mostly cloudy, with a high near 78. Northeast wind 5 to 10 mph.

    High: 78 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 78. Northeast wind 5 to 10 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. North northeast wind around 5 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 4pm. Mostly cloudy, with a high near 78. Northeast wind 5 to 10 mph.
Sunday Night
Partly cloudy, with a low around 61. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Monday
Sunny, with a high near 78. Northeast wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 86.
Wednesday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 67.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 85.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 64.
Friday
Partly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 61.
Saturday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.32°N 88.26°W
Last Update:
9:20 pm CDT Jul 4, 2026
Forecast Valid:
9pm CDT Jul 4, 2026-6pm CDT Jul 11, 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