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

9°F

-13°C

Humidity 61%
Wind Speed Calm
Barometer 30.29 in (1028.5 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Last update 4 Dec 4:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Partly cloudy, with a low around 10. Wind chill values as low as -6. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 10 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 29. Wind chill values as low as -1. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 29 °F

    Partly Sunny

  • Friday Night

    Friday Night: Patchy snow and freezing rain. Mostly cloudy, with a steady temperature around 28. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Patchy Wintry
    Mix

  • Saturday

    Saturday: Partly sunny, with a high near 29. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 29 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 19. North northwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 19 °F

    Slight Chance
    Snow then
    Chance Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly before noon. Partly sunny, with a high near 27.

    High: 27 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Slight Chance
    Snow

  • Monday

    Monday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Monday Night

    Monday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 19.

    Low: 19 °F

    Snow Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 10. Wind chill values as low as -6. South southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 29. Wind chill values as low as -1. Southwest wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Patchy snow and freezing rain. Mostly cloudy, with a steady temperature around 28. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 29. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A 50 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 19. North northwest wind around 5 mph, with gusts as high as 10 mph.
Sunday
A 40 percent chance of snow, mainly before noon. Partly sunny, with a high near 27.
Sunday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 25.
Monday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 19.
Tuesday
A chance of snow before noon. Mostly cloudy, with a high near 33.
Tuesday Night
Snow likely. Cloudy, with a low around 24.
Wednesday
Rain and snow likely. Mostly cloudy, with a high near 35.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 15.
Thursday
A chance of snow. Partly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
3:11 pm CST Dec 4, 2025
Forecast Valid:
5pm CST Dec 4, 2025-6pm CST Dec 11, 2025
 
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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