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

3°F

-16°C

Humidity 47%
Wind Speed NW 12 G 25 mph
Barometer 30.18 in (1024.7 mb)
Dewpoint -13°F (-25°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 26 Jan 12:51 am CST
Extended Forecast for

McHenry IL

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

    NOW until 12:00pm Mon

    Cold Weather Advisory

  • Overnight

    Low: -3 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny and cold, with a high near 6. Wind chill values as low as -22. West northwest wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 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. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 4 °F⇑

    Mostly Cloudy
    and Breezy

  • 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

Detailed Forecast

Overnight
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
Sunny and cold, with a high near 6. Wind chill values as low as -22. West northwest wind 10 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 25 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. Breezy, with a southwest wind 10 to 20 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.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
12:31 am CST Jan 26, 2026
Forecast Valid:
1am CST Jan 26, 2026-6pm CST Feb 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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