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.

A Few Clouds

29°F

-2°C

Humidity 72%
Wind Speed W 7 mph
Barometer 30.12 in (1021.2 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 12 Mar 5:51 am CDT
Extended Forecast for

McHenry IL

High Wind Watch March 13, 04:00am until March 13, 04:00pm
Click here for hazard details and duration
High Wind Watch

  • Today

    Today: Increasing clouds, with a high near 46. West wind around 10 mph, with gusts as high as 20 mph.

    High: 46 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers likely, mainly between midnight and 3am. Mostly cloudy, with a low around 34. Windy, with a south wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Showers
    Likely and
    Windy

  • Friday

    Friday: Mostly cloudy, with a high near 43. Very windy, with a west wind 25 to 35 mph, with gusts as high as 55 mph.

    High: 43 °F

    Mostly Cloudy
    and Very
    Windy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27. Blustery, with a west northwest wind 15 to 20 mph becoming light northwest after midnight. Winds could gust as high as 35 mph.

    Low: 27 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow showers after 1pm. Cloudy, with a high near 40. Calm wind becoming east southeast around 5 mph in the afternoon. Winds could gust as high as 10 mph.

    High: 40 °F

    Cloudy then
    Slight Chance
    Snow Showers

  • Saturday Night

    Saturday Night: A chance of snow showers before 10pm, then rain and snow showers. Low around 32. Chance of precipitation is 80%.

    Low: 32 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Sunday

    Sunday: Rain and snow showers, becoming all rain after 1pm. High near 48. Chance of precipitation is 100%.

    High: 48 °F

    Rain/Snow

  • Sunday Night

    Sunday Night: Snow. Cloudy, with a low around 17. Blustery.

    Low: 17 °F

    Snow and
    Blustery

  • Monday

    Monday: A chance of snow before 1pm. Mostly cloudy, with a high near 23. Blustery.

    High: 23 °F

    Chance Snow
    and Blustery

Detailed Forecast

Today
Increasing clouds, with a high near 46. West wind around 10 mph, with gusts as high as 20 mph.
Tonight
Showers likely, mainly between midnight and 3am. Mostly cloudy, with a low around 34. Windy, with a south wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly cloudy, with a high near 43. Very windy, with a west wind 25 to 35 mph, with gusts as high as 55 mph.
Friday Night
Mostly cloudy, with a low around 27. Blustery, with a west northwest wind 15 to 20 mph becoming light northwest after midnight. Winds could gust as high as 35 mph.
Saturday
A 20 percent chance of snow showers after 1pm. Cloudy, with a high near 40. Calm wind becoming east southeast around 5 mph in the afternoon. Winds could gust as high as 10 mph.
Saturday Night
A chance of snow showers before 10pm, then rain and snow showers. Low around 32. Chance of precipitation is 80%.
Sunday
Rain and snow showers, becoming all rain after 1pm. High near 48. Chance of precipitation is 100%.
Sunday Night
Snow. Cloudy, with a low around 17. Blustery.
Monday
A chance of snow before 1pm. Mostly cloudy, with a high near 23. Blustery.
Monday Night
Partly cloudy, with a low around 4.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Mostly cloudy, with a high near 38.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.32°N 88.26°W
Last Update:
3:11 am CDT Mar 12, 2026
Forecast Valid:
5am CDT Mar 12, 2026-6pm CDT Mar 18, 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