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

52°F

11°C

Humidity 31%
Wind Speed W 14 G 22 mph
Barometer 30.13 in (1020.6 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 5 Apr 4:51 pm CDT
Extended Forecast for

McHenry IL

  • Tonight

    Tonight: Showers likely, mainly before 1am. Mostly cloudy, with a low around 36. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 47. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 47 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24. Northwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40. North northeast wind around 5 mph becoming east southeast in the afternoon. Winds could gust as high as 10 mph.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 29. East southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 63. Breezy.

    High: 63 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly before 1am. Mostly cloudy, with a low around 36. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, with a high near 47. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 24. Northwest wind 5 to 15 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 40. North northeast wind around 5 mph becoming east southeast in the afternoon. Winds could gust as high as 10 mph.
Tuesday Night
A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 29. East southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 63. Breezy.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 66.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 42.
Friday
A chance of showers. Partly sunny, with a high near 58.
Friday Night
A chance of showers. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Partly sunny, with a high near 60.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 48.
Sunday
A chance of showers. Mostly cloudy, with a high near 73.
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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:
3:46 pm CDT Apr 5, 2026
Forecast Valid:
5pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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Additional Resources

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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