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.

Light Rain

55°F

13°C

Humidity 87%
Wind Speed NE 7 mph
Barometer 30.28 in (1025.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 15 Oct 2:51 am CDT
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Scattered showers. Cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 50%.

    Low: 54 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before 11am. Cloudy, with a high near 61. East northeast wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Showers
    Likely then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Northeast wind around 5 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 69. Southeast wind 5 to 10 mph.

    High: 69 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 53. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 53 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers. Mostly cloudy, with a high near 72.

    High: 72 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.

    Low: 57 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 71.

    High: 71 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance
    Showers

Detailed Forecast

Overnight
Scattered showers. Cloudy, with a low around 54. Northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 50%.
Wednesday
Showers likely, mainly before 11am. Cloudy, with a high near 61. East northeast wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly cloudy, with a low around 49. Northeast wind around 5 mph.
Thursday
Mostly sunny, with a high near 69. Southeast wind 5 to 10 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 53. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Friday
A 20 percent chance of showers. Mostly cloudy, with a high near 72.
Friday Night
Showers likely and possibly a thunderstorm between 1am and 4am, then showers likely after 4am. Mostly cloudy, with a low around 57. Chance of precipitation is 60%.
Saturday
Showers likely. Mostly cloudy, with a high near 71.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 46.
Sunday
A chance of showers before 1pm. Mostly sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 39.
Monday
Sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 44.
Tuesday
A chance of showers. Mostly sunny, with a high near 63.
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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:
1:11 am CDT Oct 15, 2025
Forecast Valid:
3am CDT Oct 15, 2025-6pm CDT Oct 21, 2025
 
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