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

11°F

-12°C

Humidity 67%
Wind Speed W 16 G 35 mph
Barometer 29.88 in (1014.5 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill-6°F (-21°C)
Last update 27 Jan 1:51 am CST
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: A 20 percent chance of snow showers before 4am. Mostly cloudy, with a steady temperature around 10. Wind chill values as low as -8. West southwest wind around 15 mph, with gusts as high as 30 mph.

    Low: 10 °F

    Slight Chance
    Snow Showers

  • Tuesday

    Tuesday: A chance of flurries after noon. Partly sunny, with a high near 12. Wind chill values as low as -9. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 12 °F

    Chance
    Flurries and
    Blustery

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 0. Wind chill values as low as -14. West wind around 10 mph, with gusts as high as 15 mph.

    Low: 0 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 12. Wind chill values as low as -14. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 12 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -2. Northwest wind 5 to 10 mph.

    Low: -2 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and cold, with a high near 10.

    High: 10 °F

    Cold

  • Thursday Night

    Thursday Night: A 20 percent chance of snow after midnight. Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 13.

    High: 13 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 4.

    Low: 4 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of snow showers before 4am. Mostly cloudy, with a steady temperature around 10. Wind chill values as low as -8. West southwest wind around 15 mph, with gusts as high as 30 mph.
Tuesday
A chance of flurries after noon. Partly sunny, with a high near 12. Wind chill values as low as -9. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly clear, with a low around 0. Wind chill values as low as -14. West wind around 10 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 12. Wind chill values as low as -14. West wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around -2. Northwest wind 5 to 10 mph.
Thursday
Sunny and cold, with a high near 10.
Thursday Night
A 20 percent chance of snow after midnight. Partly cloudy, with a low around -2.
Friday
Mostly sunny, with a high near 13.
Friday Night
Partly cloudy, with a low around 4.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
Mostly clear, with a low around 5.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 14.
Monday
Mostly cloudy, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
11:46 pm CST Jan 26, 2026
Forecast Valid:
2am CST Jan 27, 2026-6pm CST Feb 2, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation