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.

Overcast

49°F

9°C

Humidity 77%
Wind Speed W 18 G 28 mph
Barometer 29.72 in (1006.4 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 7 Mar 1:51 pm CST
Extended Forecast for

McHenry IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 61. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 61 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 34. West northwest wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 34 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 62. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 62 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. Southwest wind around 15 mph, with gusts as high as 30 mph.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers. Cloudy, with a low around 36.

    Low: 36 °F

    Showers

  • Wednesday

    Wednesday: Rain showers likely before noon, then a chance of rain and snow showers. Cloudy, with a high near 45.

    High: 45 °F

    Showers
    Likely then
    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 61. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 34. West northwest wind 5 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 62. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 45. Southwest wind around 15 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 68. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 44.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.
Tuesday Night
Showers. Cloudy, with a low around 36.
Wednesday
Rain showers likely before noon, then a chance of rain and snow showers. Cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Partly sunny, with a high near 45.
Thursday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 34.
Friday
Mostly cloudy, with a high near 56. Breezy.
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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:
12:36 pm CST Mar 7, 2026
Forecast Valid:
2pm CST Mar 7, 2026-6pm CDT Mar 13, 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