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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

0°F

-18°C

Humidity 72%
Wind Speed W 7 mph
Barometer 30.28 in (1028.6 mb)
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Wind Chill-13°F (-25°C)
Last update 20 Jan 1:51 am CST
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Mostly clear, with a low around -2. Wind chill values as low as -15. West wind 5 to 10 mph.

    Low: -2 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 18. Wind chill values as low as -14. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 18 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly after midnight. Temperature rising to around 23 by 2am. South southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 15 °F⇑

    Chance Snow
    then Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 26. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 26 °F

    Slight Chance
    Snow then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 9. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 9 °F

    Breezy.
    Chance Snow
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -10.

    Low: -10 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny and cold, with a high near -3.

    High: -3 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -14.

    Low: -14 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around -2. Wind chill values as low as -15. West wind 5 to 10 mph.
Tuesday
Increasing clouds, with a high near 18. Wind chill values as low as -14. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Snow, mainly after midnight. Temperature rising to around 23 by 2am. South southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Wednesday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 26. West southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
A 50 percent chance of snow before midnight. Mostly cloudy, with a low around 9. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around -10.
Friday
Partly sunny and cold, with a high near -3.
Friday Night
Mostly cloudy, with a low around -14.
Saturday
Mostly sunny and cold, with a high near 2.
Saturday Night
Mostly cloudy, with a low around -9.
Sunday
Mostly sunny and cold, with a high near 10.
Sunday Night
Partly cloudy, with a low around -1.
Monday
Mostly sunny, with a high near 16.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
12:21 am CST Jan 20, 2026
Forecast Valid:
2am CST Jan 20, 2026-6pm CST Jan 26, 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