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

0°F

-18°C

Humidity 57%
Wind Speed W 17 G 33 mph
Barometer 30.13 in (1023.0 mb)
Dewpoint -12°F (-24°C)
Visibility 10.00 mi
Wind Chill-21°F (-29°C)
Last update 19 Jan 9:51 am CST
Extended Forecast for

McHenry IL

Cold Weather Advisory January 19, 10:30am until January 19, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory
  •  
    Cold Weather Advisory January 19, 10:30am until January 19, 12:00pm

    NOW until 12:00pm Mon

    Cold Weather Advisory

  • M.L.King Day

    High: 4 °F

    Isolated
    Flurries and
    Areas Blowing
    Snow

  • Tonight

    Tonight: Intermittent flurries before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 0. Wind chill values as low as -15. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 0 °F

    Intermittent
    Flurries

  • Tuesday

    Tuesday: Increasing clouds, with a high near 19. Wind chill values as low as -13. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 19 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly after midnight. Low around 11. South wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 11 °F

    Chance Snow
    then Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 27. West wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 27 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -4.

    Low: -4 °F

    Mostly Cloudy

Detailed Forecast

M.L.King Day
Isolated flurries before noon. Areas of blowing snow. Mostly sunny and cold, with a high near 4. Wind chill values as low as -22. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Intermittent flurries before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 0. Wind chill values as low as -15. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Increasing clouds, with a high near 19. Wind chill values as low as -13. West southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Snow, mainly after midnight. Low around 11. South wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Wednesday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 27. West wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 8.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around -4.
Friday
Partly sunny and cold, with a high near 3.
Friday Night
Partly cloudy, with a low around -14.
Saturday
Mostly sunny and cold, with a high near 3.
Saturday Night
Partly cloudy, with a low around -7.
Sunday
Mostly sunny, with a high near 12.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
10:01 am CST Jan 19, 2026
Forecast Valid:
10am CST Jan 19, 2026-6pm CST Jan 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation