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

31°F

-1°C

Humidity 76%
Wind Speed N 18 G 35 mph
Barometer 30.23 in (1024.4 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 27 Mar 1:51 am CDT
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 28. North northeast wind around 15 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 42. North northeast wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 42 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 48. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 48 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37. South southwest wind around 15 mph.

    Low: 37 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 28. North northeast wind around 15 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 42. North northeast wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Mostly clear, with a low around 24. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 48. South southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 37. South southwest wind around 15 mph.
Sunday
Partly sunny, with a high near 61.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 69.
Monday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 49.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 76.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49.
Wednesday
A chance of showers. Cloudy, with a high near 58.
Wednesday Night
A chance of showers. Cloudy, with a low around 39.
Thursday
A chance of showers. Mostly cloudy, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
1:21 am CDT Mar 27, 2026
Forecast Valid:
2am CDT Mar 27, 2026-6pm CDT Apr 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation