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

34°F

1°C

Humidity 82%
Wind Speed NE 17 G 33 mph
Barometer 30.22 in (1024.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 1 Apr 7:51 am CDT
Extended Forecast for

McHenry IL

  • Today

    Today: A 20 percent chance of showers after 3pm. Cloudy, with a high near 43. East northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 43 °F

    Cloudy then
    Slight Chance
    Showers

  • Tonight

    Tonight: Showers likely, then showers and possibly a thunderstorm after 1am. Low around 38. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 38 °F

    Showers
    Likely then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 70. Breezy, with an east southeast wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 70 °F

    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 45. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 66. West southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 66 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 46. Chance of precipitation is 90%.

    Low: 46 °F

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.

    High: 62 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 48. Breezy.

    High: 48 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
A 20 percent chance of showers after 3pm. Cloudy, with a high near 43. East northeast wind around 15 mph, with gusts as high as 25 mph.
Tonight
Showers likely, then showers and possibly a thunderstorm after 1am. Low around 38. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 70. Breezy, with an east southeast wind 15 to 25 mph becoming south in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm before 1am. Mostly cloudy, with a low around 45. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 66. West southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 46. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Partly sunny, with a high near 48. Breezy.
Sunday Night
Mostly clear, with a low around 30.
Monday
A chance of showers. Partly sunny, with a high near 54.
Monday Night
A chance of showers. Mostly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 46.
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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:
3:16 am CDT Apr 1, 2026
Forecast Valid:
8am CDT Apr 1, 2026-6pm CDT Apr 7, 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