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

13°F

-11°C

Humidity 74%
Wind Speed W 15 G 25 mph
Barometer 29.87 in (1014.0 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill-3°F (-19°C)
Last update 27 Jan 4:51 am CST
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Scattered snow showers. Mostly cloudy, with a steady temperature around 11. Wind chill values as low as -5. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 11 °F

    Scattered
    Snow Showers

  • Tuesday

    Tuesday: Scattered snow showers before 9am, then scattered flurries after 9am. Patchy blowing snow before 10am. Mostly cloudy, with a temperature falling to around 8 by 8am. Wind chill values as low as -10. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.

    High: 11 °F⇓

    Scattered
    Snow Showers
    and Patchy
    Blowing Snow

  • Tuesday Night

    Tuesday Night: Partly cloudy, 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

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 13. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 13 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around -3. Northwest wind 5 to 10 mph.

    Low: -3 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 11.

    High: 11 °F

    Sunny

  • Thursday Night

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

    Low: -2 °F

    Mostly Clear
    then Slight
    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 14.

    High: 14 °F

    Mostly Sunny

  • Friday Night

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

    Low: 4 °F

    Partly Cloudy

Detailed Forecast

Overnight
Scattered snow showers. Mostly cloudy, with a steady temperature around 11. Wind chill values as low as -5. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Tuesday
Scattered snow showers before 9am, then scattered flurries after 9am. Patchy blowing snow before 10am. Mostly cloudy, with a temperature falling to around 8 by 8am. Wind chill values as low as -10. Blustery, with a west northwest wind 10 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, 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
Mostly sunny, with a high near 13. Wind chill values as low as -15. West wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around -3. Northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 11.
Thursday Night
A 20 percent chance of snow after midnight. Partly cloudy, with a low around -2.
Friday
Mostly sunny, with a high near 14.
Friday Night
Partly cloudy, with a low around 4.
Saturday
Mostly sunny, with a high near 21.
Saturday Night
Partly cloudy, with a low around 5.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 10.
Monday
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:
3:46 am CST Jan 27, 2026
Forecast Valid:
5am CST Jan 27, 2026-6pm CST Feb 2, 2026
 
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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