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.

Partly Cloudy and Windy

45°F

7°C

Humidity 35%
Wind Speed W 30 G 52 mph
Barometer 29.69 in (1006.0 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 13 Mar 3:51 pm CDT
Extended Forecast for

McHenry IL

Wind Advisory March 13, 04:42pm until March 13, 06:00pm
Click here for hazard details and duration
...
  •  
    Wind Advisory March 13, 04:42pm until March 13, 06:00pm

    NOW until 6:00pm Fri

    Wind Advisory

  • Tonight

    Low: 27 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Saturday

    Saturday: A slight chance of snow before 3pm, then a slight chance of rain and snow between 3pm and 4pm, then a slight chance of snow after 4pm. Cloudy, with a high near 40. Light and variable wind becoming east southeast 5 to 10 mph in the afternoon. Chance of precipitation is 20%.

    High: 40 °F

    Cloudy then
    Slight Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: A chance of rain and snow before 11pm, then a chance of snow between 11pm and midnight, then rain likely after midnight. Cloudy, with a low around 34. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow
    then Rain
    Likely

  • Sunday

    Sunday: Rain likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. High near 58. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.

    High: 58 °F

    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow after 1am. Patchy blowing snow after 1am. Low around 21. Windy, with a south wind 25 to 30 mph becoming north northwest after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%.

    Low: 21 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely, mainly before 1pm. Areas of blowing snow. Cloudy, with a high near 24. Windy. Chance of precipitation is 70%.

    High: 24 °F

    Snow Likely
    and Areas
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 7. Blustery.

    Low: 7 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

Detailed Forecast

Tonight
Increasing clouds, with a low around 27. Blustery, with a west northwest wind 20 to 25 mph becoming light north northwest after midnight. Winds could gust as high as 40 mph.
Saturday
A slight chance of snow before 3pm, then a slight chance of rain and snow between 3pm and 4pm, then a slight chance of snow after 4pm. Cloudy, with a high near 40. Light and variable wind becoming east southeast 5 to 10 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
A chance of rain and snow before 11pm, then a chance of snow between 11pm and midnight, then rain likely after midnight. Cloudy, with a low around 34. East wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Sunday
Rain likely before 1pm, then showers and possibly a thunderstorm between 1pm and 4pm, then rain after 4pm. High near 58. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow after 1am. Patchy blowing snow after 1am. Low around 21. Windy, with a south wind 25 to 30 mph becoming north northwest after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 100%.
Monday
Snow likely, mainly before 1pm. Areas of blowing snow. Cloudy, with a high near 24. Windy. Chance of precipitation is 70%.
Monday Night
Mostly cloudy, with a low around 7. Blustery.
Tuesday
Mostly sunny, with a high near 24.
Tuesday Night
A chance of snow showers. Mostly cloudy, with a low around 16.
Wednesday
Partly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
McHenry IL
 42.34°N 88.26°W
Last Update:
4:21 pm CDT Mar 13, 2026
Forecast Valid:
4pm CDT Mar 13, 2026-6pm CDT Mar 20, 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