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.

Fair

37°F

3°C

Humidity 82%
Wind Speed SE 5 mph
Barometer 30.08 in (1019.4 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 25 Mar 5:51 am CDT
Extended Forecast for

McHenry IL

  • Today

    Today: Partly sunny, with a high near 69. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 69 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 51. South southwest wind 5 to 10 mph.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 73. Breezy, with a south southwest wind 5 to 10 mph becoming north 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

    High: 73 °F

    Mostly Sunny
    then Chance
    T-storms and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 28. Blustery, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Chance
    Showers and
    Blustery then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43. North wind 10 to 15 mph.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 69. South southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 51. South southwest wind 5 to 10 mph.
Thursday
A 50 percent chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 73. Breezy, with a south southwest wind 5 to 10 mph becoming north 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.
Thursday Night
A 30 percent chance of showers, mainly before 10pm. Mostly cloudy, with a low around 28. Blustery, with a north northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Friday
Mostly sunny, with a high near 43. North wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 25.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 71.
Monday Night
A chance of showers. Mostly cloudy, with a low around 48.
Tuesday
A chance of showers. Mostly cloudy, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
4:26 am CDT Mar 25, 2026
Forecast Valid:
5am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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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