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

19°F

-7°C

Humidity 92%
Wind Speed SW 14 mph
Barometer 29.97 in (1016.8 mb)
Dewpoint 17°F (-8°C)
Visibility 8.00 mi
Wind Chill5°F (-15°C)
Last update 2 Dec 7:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Cloudy, with a temperature rising to around 24 by 3am. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 21 °F⇑

    Cloudy

  • Wednesday

    Wednesday: A chance of snow showers between 8am and 3pm. Cloudy, with a high near 32. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.

    High: 32 °F

    Chance Snow
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 3. Wind chill values as low as -13. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 3 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 16. Wind chill values as low as -13. Northwest wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 16 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 4. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 4 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 23.

    High: 23 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.

    Low: 16 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow. Mostly cloudy, with a low around 17.

    Low: 17 °F

    Chance Snow

Detailed Forecast

Tonight
Cloudy, with a temperature rising to around 24 by 3am. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday
A chance of snow showers between 8am and 3pm. Cloudy, with a high near 32. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
Partly cloudy, with a low around 3. Wind chill values as low as -13. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 16. Wind chill values as low as -13. Northwest wind 5 to 10 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 4. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly cloudy, with a high near 23.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 16.
Saturday
Partly sunny, with a high near 27.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 17.
Sunday
A chance of snow. Mostly cloudy, with a high near 27.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 14.
Monday
Partly sunny, with a high near 27.
Monday Night
A chance of snow. Cloudy, with a low around 19.
Tuesday
A chance of snow. Mostly cloudy, with a high near 32.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.48°N 87.87°W
Last Update:
4:36 pm CST Dec 2, 2025
Forecast Valid:
8pm CST Dec 2, 2025-6pm CST Dec 9, 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