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.

Fog/Mist

26°F

-3°C

Humidity 92%
Wind Speed W 5 mph
Barometer 29.91 in (1013.6 mb)
Dewpoint 24°F (-4°C)
Visibility 6.00 mi
Wind Chill20°F (-7°C)
Last update 15 Feb 2:51 am CST
Extended Forecast for

McHenry IL

  • Overnight

    Overnight: Mostly clear, with a low around 28. West southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 28 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 54. West northwest wind 5 to 10 mph.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 34. Light and variable wind becoming south southwest 5 to 10 mph after midnight.

    Low: 34 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Mostly cloudy, then gradually becoming sunny, with a high near 61. West southwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 61 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. West southwest wind around 5 mph becoming east after midnight. Winds could gust as high as 10 mph.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.

    Low: 46 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday

    Wednesday: A chance of rain before noon. Mostly sunny, with a high near 62. Breezy.

    High: 62 °F

    Breezy.
    Chance Rain
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 28. West southwest wind around 5 mph, with gusts as high as 10 mph.
Sunday
Sunny, with a high near 54. West northwest wind 5 to 10 mph.
Sunday Night
Increasing clouds, with a low around 34. Light and variable wind becoming south southwest 5 to 10 mph after midnight.
Washington's Birthday
Mostly cloudy, then gradually becoming sunny, with a high near 61. West southwest wind 5 to 15 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 37. West southwest wind around 5 mph becoming east after midnight. Winds could gust as high as 10 mph.
Tuesday
Mostly cloudy, with a high near 52.
Tuesday Night
A chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 46. Chance of precipitation is 70%.
Wednesday
A chance of rain before noon. Mostly sunny, with a high near 62. Breezy.
Wednesday Night
Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 30.
Friday
A chance of snow. Mostly cloudy, with a high near 38.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
2:11 am CST Feb 15, 2026
Forecast Valid:
2am CST Feb 15, 2026-6pm CST Feb 21, 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