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

Storm Impacting the Southwest U.S.

A slow moving weather disturbance will continue to bring periodic rain showers, a few isolated thunderstorms, and a localized flash flooding across the Southwest. The threat will expand into the Southern Plains Wednesday night. Moderate to heavy snow across the Sierra Nevada and southern Utah Ranges will continue into the overnight period. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

41°F

5°C

Humidity 93%
Wind Speed NE 7 mph
Barometer 30.11 in (1020.3 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 18 Nov 9:51 pm CST
Extended Forecast for

Great Lakes IL

  • Tonight

    Tonight: Cloudy, with a low around 40. Northeast wind around 10 mph.

    Low: 40 °F

    Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 43. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 43 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 40. East southeast wind around 5 mph becoming southwest after midnight.

    Low: 40 °F

    Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 54. South southwest wind 5 to 10 mph.

    High: 54 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. Southwest wind around 5 mph becoming north northwest after midnight. Winds could gust as high as 10 mph.

    Low: 38 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of rain. Partly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Cloudy, with a low around 40. Northeast wind around 10 mph.
Wednesday
Cloudy, with a high near 43. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Wednesday Night
Cloudy, with a low around 40. East southeast wind around 5 mph becoming southwest after midnight.
Thursday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 54. South southwest wind 5 to 10 mph.
Thursday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 38. Southwest wind around 5 mph becoming north northwest after midnight. Winds could gust as high as 10 mph.
Friday
Mostly sunny, with a high near 49.
Friday Night
A 20 percent chance of rain. Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Sunny, with a high near 53.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Mostly sunny, with a high near 53.
Monday Night
A chance of rain. Partly cloudy, with a low around 39.
Tuesday
A chance of rain. Mostly cloudy, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Lakes IL
 42.3°N 87.85°W
Last Update:
8:46 pm CST Nov 18, 2025
Forecast Valid:
10pm CST Nov 18, 2025-6pm CST Nov 25, 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