National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Mostly Cloudy

29°F

-2°C

Humidity 78%
Wind Speed N 7 mph
Barometer 30.22 in (1024.7 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 23 Mar 2:51 am CDT
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 29. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 42. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 42 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 29. East southeast wind around 5 mph becoming south after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Partly sunny, with a high near 52. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 52 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. South wind around 5 mph, with gusts as high as 15 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers after 1pm. Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 29. North wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 42. North wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Increasing clouds, with a low around 29. East southeast wind around 5 mph becoming south after midnight.
Tuesday
Partly sunny, with a high near 52. South wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Mostly cloudy, with a low around 36. South wind around 5 mph, with gusts as high as 15 mph.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
A chance of showers after 1pm. Partly sunny, with a high near 72.
Thursday Night
A chance of showers before 1am. Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 42.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 50.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Partly sunny, with a high near 56.
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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:
1:31 am CDT Mar 23, 2026
Forecast Valid:
3am CDT Mar 23, 2026-6pm CDT Mar 29, 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