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.

Overcast

37°F

3°C

Humidity 89%
Wind Speed NE 9 mph
Barometer 30.17 in (1022.7 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 25 Dec 7:51 am CST
Extended Forecast for

Long Lake IL

  • Christmas Day

    Christmas Day: Partly sunny, with a high near 39. Northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 39 °F

    Partly Sunny

  • Tonight

    Tonight: Showers, mainly after midnight. Patchy fog after 3am. Low around 37. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Isolated
    Showers then
    Showers and
    Patchy Fog

  • Friday

    Friday: Scattered showers before noon. Patchy fog before noon. Otherwise, cloudy, with a high near 48. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 50%.

    High: 48 °F

    Scattered
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.

    Low: 35 °F

    Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 43. Southeast wind 5 to 10 mph.

    High: 43 °F

    Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain. Cloudy, with a low around 42.

    Low: 42 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A 50 percent chance of rain. Cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A chance of rain and snow before midnight. Mostly cloudy, with a low around 15. Blustery.

    Low: 15 °F

    Blustery.
    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 21. Blustery.

    High: 21 °F

    Mostly Sunny
    and Blustery

Detailed Forecast

Christmas Day
Partly sunny, with a high near 39. Northeast wind around 10 mph, with gusts as high as 20 mph.
Tonight
Showers, mainly after midnight. Patchy fog after 3am. Low around 37. Southeast wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Scattered showers before noon. Patchy fog before noon. Otherwise, cloudy, with a high near 48. Southeast wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 50%.
Friday Night
Cloudy, with a low around 35. Northwest wind around 5 mph becoming calm in the evening.
Saturday
Cloudy, with a high near 43. Southeast wind 5 to 10 mph.
Saturday Night
A 20 percent chance of rain. Cloudy, with a low around 42.
Sunday
A 50 percent chance of rain. Cloudy, with a high near 47.
Sunday Night
A chance of rain and snow before midnight. Mostly cloudy, with a low around 15. Blustery.
Monday
Mostly sunny, with a high near 21. Blustery.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Partly sunny, with a high near 27.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Mostly cloudy, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
5:56 am CST Dec 25, 2025
Forecast Valid:
8am CST Dec 25, 2025-6pm CST Dec 31, 2025
 
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