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 41%
Wind Speed SW 13 mph
Barometer 30.03 in (1017.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 13 Feb 3:51 pm CST
Extended Forecast for

McHenry IL

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly clear, with a low around 27. Southwest wind around 5 mph becoming calm in the evening.

    Low: 27 °F

    Clear then
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 54 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. South southeast wind around 5 mph becoming calm.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 57. West southwest wind around 5 mph becoming north in the afternoon.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. Calm wind becoming southwest around 5 mph after midnight. Winds could gust as high as 10 mph.

    Low: 36 °F

    Partly Cloudy

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 49.

    High: 49 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    Showers

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 27. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 54. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 30. South southeast wind around 5 mph becoming calm.
Sunday
Sunny, with a high near 57. West southwest wind around 5 mph becoming north in the afternoon.
Sunday Night
Partly cloudy, with a low around 36. Calm wind becoming southwest around 5 mph after midnight. Winds could gust as high as 10 mph.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
Mostly cloudy, with a high near 49.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 42.
Wednesday
A chance of showers before noon. Partly sunny, with a high near 55.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
A chance of showers. Mostly cloudy, with a high near 44.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 39.
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:
3:11 pm CST Feb 13, 2026
Forecast Valid:
4pm CST Feb 13, 2026-6pm CST Feb 20, 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