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.

Light Rain and Windy

40°F

4°C

Humidity 83%
Wind Speed S 28 G 49 mph
Barometer 29.39 in (995.7 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 13 Mar 3:51 am CDT
Extended Forecast for

McHenry IL

High Wind Warning March 13, 04:03am until March 13, 04:00pm
Click here for hazard details and duration
High Wind Warning
  •  
    High Wind Warning March 13, 04:03am until March 13, 04:00pm

    NOW until 4:00pm Fri

    High Wind Warning

  • Overnight

    Low: 40 °F

    Chance
    Showers and
    Windy

  • Friday

    Friday: A slight chance of rain showers, mixing with snow after 7am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 43. Very windy, with a west northwest wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 20%.

    High: 43 °F

    Very Windy.
    Slight Chance
    Rain/Snow
    then Partly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Blustery, with a northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 35 mph.

    Low: 28 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow showers. Cloudy, with a high near 40. East northeast wind 5 to 10 mph becoming southeast in the morning.

    High: 40 °F

    Slight Chance
    Snow Showers

  • Saturday Night

    Saturday Night: Rain, possibly mixed with snow showers, becoming all rain after 4am. Low around 33. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 33 °F

    Rain/Snow

  • Sunday

    Sunday: Showers. High near 56. Breezy. Chance of precipitation is 90%.

    High: 56 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Rain showers before 10pm, then snow showers, possibly mixed with rain between 10pm and 1am, then snow showers after 1am. Low around 19. Blustery. Chance of precipitation is 100%.

    Low: 19 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: Snow showers, mainly before 1pm. Cloudy, with a high near 24. Blustery.

    High: 24 °F

    Snow Showers
    and Blustery

Detailed Forecast

Overnight
A 40 percent chance of showers. Mostly cloudy, with a steady temperature around 40. Windy, with a south southwest wind around 30 mph, with gusts as high as 50 mph.
Friday
A slight chance of rain showers, mixing with snow after 7am, then gradually ending. Cloudy, then gradually becoming mostly sunny, with a high near 43. Very windy, with a west northwest wind 30 to 35 mph, with gusts as high as 55 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 28. Blustery, with a northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 35 mph.
Saturday
A 20 percent chance of snow showers. Cloudy, with a high near 40. East northeast wind 5 to 10 mph becoming southeast in the morning.
Saturday Night
Rain, possibly mixed with snow showers, becoming all rain after 4am. Low around 33. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Sunday
Showers. High near 56. Breezy. Chance of precipitation is 90%.
Sunday Night
Rain showers before 10pm, then snow showers, possibly mixed with rain between 10pm and 1am, then snow showers after 1am. Low around 19. Blustery. Chance of precipitation is 100%.
Monday
Snow showers, mainly before 1pm. Cloudy, with a high near 24. Blustery.
Monday Night
Partly cloudy, with a low around 5. Blustery.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 14.
Wednesday
Mostly cloudy, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Mostly sunny, with a high near 48.
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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:
3:41 am CDT Mar 13, 2026
Forecast Valid:
4am CDT Mar 13, 2026-6pm CDT Mar 19, 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