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

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

62°F

17°C

Humidity 75%
Wind Speed E 5 mph
Barometer 30.16 in (1021.2 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 9 Oct 10:51 am CDT
Extended Forecast for

McHenry IL

  • Today

    Today: A chance of showers and thunderstorms between 1pm and 4pm. Mostly cloudy, with a high near 70. Southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.

    High: 70 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 58. East southeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 58 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Increasing clouds, with a high near 78. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 78 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 56. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 75. East southeast wind around 5 mph.

    High: 75 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Partly sunny, with a high near 80.

    High: 80 °F

    Partly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms between 1pm and 4pm. Mostly cloudy, with a high near 70. Southeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 58. East southeast wind around 10 mph, with gusts as high as 15 mph.
Saturday
Increasing clouds, with a high near 78. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 56. South southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 75. East southeast wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 58.
Columbus Day
Partly sunny, with a high near 80.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
A chance of showers. Partly sunny, with a high near 65.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 50.
Thursday
A chance of showers. Mostly cloudy, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.32°N 88.26°W
Last Update:
10:46 am CDT Oct 9, 2026
Forecast Valid:
11am CDT Oct 9, 2026-6pm CDT Oct 15, 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