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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

4°F

-16°C

Humidity 76%
Wind Speed SW 14 mph
Barometer 30.01 in (1018.9 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 18 Jan 7:51 am CST
Extended Forecast for

McHenry IL

Cold Weather Advisory January 19, 03:00am until January 19, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • Today

    Today: Snow, mainly after 4pm. High near 17. Wind chill values as low as -10. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.

    High: 17 °F

    Partly Sunny
    then Snow

  • Tonight

    Tonight: Snow, mainly before 11pm. Low around 0. Wind chill values as low as -19. Blustery, with a southwest wind 10 to 15 mph becoming west northwest 20 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 0 °F

    Blustery.
    Snow then
    Slight Chance
    Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny and cold, with a high near 6. Wind chill values as low as -21. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 6 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around -1. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: -1 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 19. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 19 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 11.

    Low: 11 °F

    Chance Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 26.

    High: 26 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 7.

    Low: 7 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

Detailed Forecast

Today
Snow, mainly after 4pm. High near 17. Wind chill values as low as -10. Southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than a half inch possible.
Tonight
Snow, mainly before 11pm. Low around 0. Wind chill values as low as -19. Blustery, with a southwest wind 10 to 15 mph becoming west northwest 20 to 25 mph after midnight. Winds could gust as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
M.L.King Day
Mostly sunny and cold, with a high near 6. Wind chill values as low as -21. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around -1. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 19. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 11.
Wednesday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 26.
Wednesday Night
Partly cloudy, with a low around 7.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around 9.
Friday
Mostly cloudy, with a high near 24.
Friday Night
A chance of snow. Mostly cloudy, with a low around 5.
Saturday
A chance of snow. Partly sunny, with a high near 13.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
8:01 am CST Jan 18, 2026
Forecast Valid:
8am CST Jan 18, 2026-6pm CST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation