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

22°F

-6°C

Humidity 75%
Wind Speed SW 12 mph
Barometer 30.07 in (1019.9 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 1 Feb 10:51 pm CST
Extended Forecast for

McHenry IL

  • Tonight

    Tonight: Snow showers before 3am, then patchy freezing rain. Low around 19. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. Total nighttime snow accumulation of less than a half inch possible.

    Low: 19 °F

    Wintry Mix

  • Monday

    Monday: Patchy freezing rain before 7am. Mostly cloudy, with a high near 26. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.

    High: 26 °F

    Patchy
    Freezing Rain
    then Partly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 13. West northwest wind around 5 mph.

    Low: 13 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24. North wind around 5 mph, with gusts as high as 10 mph.

    High: 24 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 7. North wind around 5 mph becoming calm in the evening.

    Low: 7 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 24.

    High: 24 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow before midnight. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Snow showers before 3am, then patchy freezing rain. Low around 19. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. Little or no ice accumulation expected. Total nighttime snow accumulation of less than a half inch possible.
Monday
Patchy freezing rain before 7am. Mostly cloudy, with a high near 26. West northwest wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 13. West northwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 24. North wind around 5 mph, with gusts as high as 10 mph.
Tuesday Night
Partly cloudy, with a low around 7. North wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 24.
Wednesday Night
Partly cloudy, with a low around 11.
Thursday
Partly sunny, with a high near 32.
Thursday Night
A chance of snow before midnight. Mostly cloudy, with a low around 25.
Friday
Partly sunny, with a high near 33.
Friday Night
Partly cloudy, with a low around 8.
Saturday
Mostly sunny, with a high near 22.
Saturday Night
Mostly cloudy, with a low around 14.
Sunday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.36°N 88.26°W
Last Update:
11:11 pm CST Feb 1, 2026
Forecast Valid:
11pm CST Feb 1, 2026-6pm CST Feb 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation