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

65°F

18°C

Humidity 68%
Wind Speed Calm
Barometer 29.99 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 23 Aug 7:51 pm CDT
Extended Forecast for

Long Lake IL

  • Tonight

    Tonight: Mostly clear, with a low around 52. Northwest wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76. Calm wind becoming northwest around 5 mph in the morning. Winds could gust as high as 10 mph.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming clear, with a low around 55. North northeast wind around 5 mph becoming calm.

    Low: 55 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind 5 to 10 mph.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 61.

    Low: 61 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 52. Northwest wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 76. Calm wind becoming northwest around 5 mph in the morning. Winds could gust as high as 10 mph.
Monday Night
Mostly cloudy, then gradually becoming clear, with a low around 55. North northeast wind around 5 mph becoming calm.
Tuesday
Mostly sunny, with a high near 80. Light and variable wind becoming south 5 to 10 mph in the morning.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62. South wind 5 to 10 mph.
Wednesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 61.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 60.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 64.
Sunday
A chance of showers. Mostly cloudy, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
7:41 pm CDT Aug 23, 2026
Forecast Valid:
8pm CDT Aug 23, 2026-6pm CDT Aug 30, 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