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.

Overcast

28°F

-2°C

Humidity 69%
Wind Speed W 7 mph
Barometer 30.09 in (1020.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 21 Feb 8:51 am CST
Extended Forecast for

Long Lake IL

  • Today

    Today: A chance of flurries between 1pm and 5pm, then a slight chance of snow after 5pm. Cloudy, with a high near 33. West northwest wind 10 to 15 mph. Chance of precipitation is 20%.

    High: 33 °F

    Cloudy then
    Slight Chance
    Snow

  • Tonight

    Tonight: A 40 percent chance of snow, mainly after 9pm. Cloudy, with a low around 21. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 21 °F

    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 28. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 28 °F

    Blustery.
    Slight Chance
    Snow then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16. Wind chill values as low as zero. North northwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28. North northwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow. Mostly cloudy, with a high near 39.

    High: 39 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain after noon. Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

Today
A chance of flurries between 1pm and 5pm, then a slight chance of snow after 5pm. Cloudy, with a high near 33. West northwest wind 10 to 15 mph. Chance of precipitation is 20%.
Tonight
A 40 percent chance of snow, mainly after 9pm. Cloudy, with a low around 21. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of snow before noon. Mostly cloudy, with a high near 28. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16. Wind chill values as low as zero. North northwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 28. North northwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
A 30 percent chance of snow. Mostly cloudy, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 28.
Wednesday
A chance of rain after noon. Partly sunny, with a high near 45.
Wednesday Night
A chance of rain before midnight. Mostly cloudy, with a low around 23.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
9:01 am CST Feb 21, 2026
Forecast Valid:
9am CST Feb 21, 2026-6pm CST Feb 27, 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