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.

Fair

52°F

11°C

Humidity 80%
Wind Speed W 8 mph
Barometer 29.82 in (1009.9 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 5 Nov 7:51 am CST
Extended Forecast for

McHenry IL

  • Today

    Today: Mostly sunny, with a high near 57. Breezy, with a north northwest wind 10 to 15 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 35 mph.

    High: 57 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 30. West northwest wind 5 to 10 mph becoming light northwest after midnight.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 55. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 55 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Showers, mainly after midnight. Low around 45. South southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

    Low: 45 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 62. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 62 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

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

    Low: 34 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain after noon. Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow before noon. Mostly sunny, with a high near 36.

    High: 36 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 57. Breezy, with a north northwest wind 10 to 15 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 35 mph.
Tonight
Mostly clear, with a low around 30. West northwest wind 5 to 10 mph becoming light northwest after midnight.
Thursday
Increasing clouds, with a high near 55. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Showers, mainly after midnight. Low around 45. South southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Friday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 62. West wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
A 50 percent chance of rain after noon. Partly sunny, with a high near 47.
Saturday Night
Rain likely before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.
Sunday
A chance of rain and snow before noon. Mostly sunny, with a high near 36.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 36.
Monday Night
Partly cloudy, with a low around 20.
Veterans Day
Partly sunny, with a high near 42.
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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:
5:11 am CST Nov 5, 2025
Forecast Valid:
7am CST Nov 5, 2025-6pm CST Nov 11, 2025
 
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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