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.

Fair

61°F

16°C

Humidity 44%
Wind Speed Calm
Barometer 30.12 in (1019.8 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 9 Apr 5:51 pm CDT
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 43. West southwest wind around 5 mph becoming east northeast in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Low: 43 °F

    Heavy Rain

  • Friday

    Friday: A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 51. North wind 5 to 10 mph.

    High: 51 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly clear, with a low around 33. East northeast wind around 5 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 55. East southeast wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 55 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. East southeast wind 10 to 15 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.

    Low: 46 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 73. Breezy. Chance of precipitation is 40%.

    High: 73 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 61. Breezy.

    Low: 61 °F

    Chance
    Showers and
    Breezy

  • Monday

    Monday: Mostly cloudy, with a high near 77.

    High: 77 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 43. West southwest wind around 5 mph becoming east northeast in the evening. Winds could gust as high as 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday
A 30 percent chance of showers, mainly before 8am. Mostly cloudy, with a high near 51. North wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 33. East northeast wind around 5 mph becoming calm in the evening.
Saturday
Increasing clouds, with a high near 55. East southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46. East southeast wind 10 to 15 mph becoming south after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 40%.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 73. Breezy. Chance of precipitation is 40%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 61. Breezy.
Monday
Mostly cloudy, with a high near 77.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79.
Tuesday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 56.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
6:11 pm CDT Apr 9, 2026
Forecast Valid:
6pm CDT Apr 9, 2026-6pm CDT Apr 16, 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