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

15°F

-9°C

Humidity 51%
Wind Speed SW 10 mph
Barometer 30.26 in (1027.5 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 20 Jan 2:51 pm CST
Extended Forecast for

Long Lake IL

Winter Weather Advisory January 20, 08:00pm until January 21, 08:00am
Click here for hazard details and duration
Winter Weather Advisory

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 17. South wind 5 to 10 mph.

    High: 17 °F

    Partly Sunny

  • Tonight

    Tonight: Snow, mainly after 9pm. Temperature rising to around 18 by midnight. South wind around 5 mph becoming west southwest after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    Low: 14 °F⇑

    Snow

  • Wednesday

    Wednesday: Snow likely with a chance of flurries before 4pm, then scattered flurries between 4pm and 5pm, then scattered snow showers after 5pm. Mostly cloudy, with a high near 24. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 24 °F

    Snow Likely
    then
    Scattered
    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers likely, mainly before 10pm. Patchy blowing snow before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -5. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 10 °F

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 18. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 18 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -11.

    Low: -11 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -4.

    High: -4 °F

    Cold

  • Friday Night

    Friday Night: Partly cloudy, with a low around -12.

    Low: -12 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near 5.

    High: 5 °F

    Cold

Detailed Forecast

This Afternoon
Partly sunny, with a high near 17. South wind 5 to 10 mph.
Tonight
Snow, mainly after 9pm. Temperature rising to around 18 by midnight. South wind around 5 mph becoming west southwest after midnight. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Wednesday
Snow likely with a chance of flurries before 4pm, then scattered flurries between 4pm and 5pm, then scattered snow showers after 5pm. Mostly cloudy, with a high near 24. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow showers likely, mainly before 10pm. Patchy blowing snow before 3am. Mostly cloudy, with a low around 10. Wind chill values as low as -5. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Thursday
Mostly sunny, with a high near 18. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around -11.
Friday
Mostly sunny and cold, with a high near -4.
Friday Night
Partly cloudy, with a low around -12.
Saturday
Mostly cloudy and cold, with a high near 5.
Saturday Night
Mostly cloudy, with a low around -2.
Sunday
Partly sunny, with a high near 12.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Mostly sunny, with a high near 14.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Long Lake IL
 42.38°N 88.14°W
Last Update:
3:11 pm CST Jan 20, 2026
Forecast Valid:
3pm CST Jan 20, 2026-6pm CST Jan 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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