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.

Overcast

6°F

-14°C

Humidity 54%
Wind Speed NW 10 mph
Barometer 30.15 in (1023.9 mb)
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Wind Chill-8°F (-22°C)
Last update 25 Jan 9:51 pm CST
Extended Forecast for

McHenry IL

Cold Weather Advisory January 26, 12:00am until January 26, 12:00pm
Click here for hazard details and duration
Cold Weather Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around -3. Wind chill values as low as -19. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: -3 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny and cold, with a high near 6. Wind chill values as low as -22. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 6 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear during the early evening, then becoming mostly cloudy, with a temperature rising to around 12 by 2am. Wind chill values as low as -13. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 4 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 14. Wind chill values as low as -6. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 14 °F

    Partly Sunny
    and Blustery

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around -1. West wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: -1 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Partly sunny, with a high near 12.

    High: 12 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around -3.

    Low: -3 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 12.

    High: 12 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around -3. Wind chill values as low as -19. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny and cold, with a high near 6. Wind chill values as low as -22. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear during the early evening, then becoming mostly cloudy, with a temperature rising to around 12 by 2am. Wind chill values as low as -13. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tuesday
Partly sunny, with a high near 14. Wind chill values as low as -6. 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 -1. West wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
A 20 percent chance of snow after noon. Partly sunny, with a high near 12.
Wednesday Night
Partly cloudy, with a low around -3.
Thursday
Mostly sunny, with a high near 12.
Thursday Night
Partly cloudy, with a low around 0.
Friday
Mostly sunny, with a high near 14.
Friday Night
Partly cloudy, with a low around 3.
Saturday
Sunny, with a high near 20.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
9:51 pm CST Jan 25, 2026
Forecast Valid:
10pm CST Jan 25, 2026-6pm CST Feb 1, 2026
 
Forecast Discussion
 
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Additional Resources

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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