National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

40°F

4°C

Humidity 83%
Wind Speed NW 9 mph
Barometer 30.18 in (1022.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 6 Apr 7:51 am CDT
Extended Forecast for

Long Lake IL

  • Today

    Today: Partly sunny, with a high near 47. West northwest wind around 15 mph, with gusts as high as 30 mph.

    High: 47 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39. North northeast wind around 10 mph becoming east in the afternoon.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    Low: 28 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 62. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 62 °F

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Mostly cloudy, with a high near 64.

    High: 64 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers before 1pm. Mostly sunny, with a high near 59.

    High: 59 °F

    Chance
    Showers

Detailed Forecast

Today
Partly sunny, with a high near 47. West northwest wind around 15 mph, with gusts as high as 30 mph.
Tonight
A 20 percent chance of snow showers after midnight. Mostly cloudy, with a low around 24. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 39. North northeast wind around 10 mph becoming east in the afternoon.
Tuesday Night
A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Increasing clouds, with a low around 28. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 62. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Wednesday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 64.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 44.
Friday
A chance of showers before 1pm. Mostly sunny, with a high near 59.
Friday Night
A chance of showers. Partly cloudy, with a low around 39.
Saturday
A chance of showers. Partly sunny, with a high near 58.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 48.
Sunday
A chance of showers. Mostly cloudy, with a high near 74.
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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:
4:26 am CDT Apr 6, 2026
Forecast Valid:
8am CDT Apr 6, 2026-6pm CDT Apr 12, 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