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Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

14°F

-10°C

Humidity 56%
Wind Speed NW 7 mph
Barometer 29.95 in (1016.2 mb)
Dewpoint 1°F (-17°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 17 Mar 1:51 am CDT
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Partly cloudy, with a low around 6. Wind chill values as low as -7. Northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 6 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 21. Wind chill values as low as -9. Northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 21 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Snow, mainly after 10pm. Temperature rising to around 23 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.

    Low: 20 °F⇑

    Snow Likely
    then Snow

  • Wednesday

    Wednesday: Snow likely before 7am. Mostly cloudy, with a high near 39. West southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow Likely
    then Partly
    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind around 5 mph.

    Low: 34 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 6. Wind chill values as low as -7. Northwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Increasing clouds, with a high near 21. Wind chill values as low as -9. Northwest wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Tuesday Night
Snow, mainly after 10pm. Temperature rising to around 23 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
Wednesday
Snow likely before 7am. Mostly cloudy, with a high near 39. West southwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 34. Southwest wind around 5 mph.
Thursday
Partly sunny, with a high near 49.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly cloudy, with a high near 56.
Friday Night
Mostly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 61.
Saturday Night
Mostly cloudy, with a low around 39.
Sunday
Mostly cloudy, with a high near 54.
Sunday Night
Mostly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.32°N 88.26°W
Last Update:
1:36 am CDT Mar 17, 2026
Forecast Valid:
2am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
Forecast Discussion
 
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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