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.

A Few Clouds

73°F

23°C

Humidity 96%
Wind Speed Calm
Barometer 29.95 in (1013.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 10 Aug 9:51 pm CDT
Extended Forecast for

Mc Henry IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 11pm. Patchy fog. Otherwise, mostly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: Showers and thunderstorms, mainly before 1pm. Some of the storms could be severe and produce heavy rainfall. High near 80. Calm wind becoming west southwest around 5 mph in the morning. Winds could gust as high as 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Severe
    Thunderstorms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 66. Northeast wind around 5 mph becoming calm.

    Low: 66 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 82 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65. East wind around 5 mph becoming calm.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.

    Low: 63 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A chance of showers before 1pm. Partly sunny, with a high near 76.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Patchy fog. Otherwise, mostly cloudy, with a low around 67. Calm wind.
Tuesday
Showers and thunderstorms, mainly before 1pm. Some of the storms could be severe and produce heavy rainfall. High near 80. Calm wind becoming west southwest around 5 mph in the morning. Winds could gust as high as 10 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night
A 30 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 66. Northeast wind around 5 mph becoming calm.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 65. East wind around 5 mph becoming calm.
Thursday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
Thursday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 20%.
Friday
A chance of showers before 1pm. Partly sunny, with a high near 76.
Friday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66.
Sunday
A chance of showers. Mostly cloudy, with a high near 78.
Sunday Night
Mostly cloudy, with a low around 62.
Monday
Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mc Henry IL
 42.34°N 88.29°W
Last Update:
8:51 pm CDT Aug 10, 2026
Forecast Valid:
10pm CDT Aug 10, 2026-6pm CDT Aug 17, 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