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.

Fair

26°F

-3°C

Humidity 60%
Wind Speed NE 7 mph
Barometer 30.49 in (1033.8 mb)
Dewpoint 14°F (-10°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 7 Apr 6:51 am CDT
Extended Forecast for

McHenry IL

Flood Warning April 7, 01:00pm until April 11, 07:00pm
Click here for hazard details and duration
Flood Warning

  • Today

    Today: Sunny, with a high near 40. North northeast wind 5 to 10 mph becoming east in the afternoon.

    High: 40 °F

    Sunny

  • Tonight

    Tonight: A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Partly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 65. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.

    High: 65 °F

    Decreasing
    Clouds and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 50. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely and
    Breezy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 64. West wind 10 to 15 mph.

    High: 64 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 43. Chance of precipitation is 80%.

    Low: 43 °F

    Showers

  • Friday

    Friday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 56.

    High: 56 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 40. North northeast wind 5 to 10 mph becoming east in the afternoon.
Tonight
A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 65. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.
Wednesday Night
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 50. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Thursday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 64. West wind 10 to 15 mph.
Thursday Night
Showers and possibly a thunderstorm. Low around 43. Chance of precipitation is 80%.
Friday
A 30 percent chance of showers before 1pm. Mostly cloudy, with a high near 56.
Friday Night
Partly cloudy, with a low around 36.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 47.
Sunday
A chance of showers. Mostly cloudy, with a high near 74.
Sunday Night
A chance of showers. Cloudy, with a low around 60.
Monday
A chance of showers. Mostly cloudy, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
3:56 am CDT Apr 7, 2026
Forecast Valid:
7am CDT Apr 7, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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