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.

Mostly Cloudy

32°F

0°C

Humidity 64%
Wind Speed NW 8 mph
Barometer 30.30 in (1027.7 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 11 Jan 11:51 am CST
Extended Forecast for

Zion IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 34. Northwest wind 10 to 15 mph becoming west southwest. Winds could gust as high as 20 mph.

    High: 34 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 34. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 47. Southwest wind around 15 mph, with gusts as high as 25 mph.

    High: 47 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A slight chance of rain showers between midnight and 3am, then a chance of rain and snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Snow showers likely, mainly before noon. Mostly cloudy, with a high near 32. Breezy. Chance of precipitation is 60%.

    High: 32 °F

    Snow Showers
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of snow showers. Mostly cloudy, with a low around 18. Blustery.

    Low: 18 °F

    Chance Snow
    Showers and
    Blustery

  • Thursday

    Thursday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 34. Northwest wind 10 to 15 mph becoming west southwest. Winds could gust as high as 20 mph.
Tonight
Mostly cloudy, with a low around 27. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Monday
Mostly sunny, with a high near 41. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Increasing clouds, with a low around 34. West southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 47. Southwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
A slight chance of rain showers between midnight and 3am, then a chance of rain and snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Wednesday
Snow showers likely, mainly before noon. Mostly cloudy, with a high near 32. Breezy. Chance of precipitation is 60%.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 18. Blustery.
Thursday
Partly sunny, with a high near 28.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 23.
Friday
A chance of snow showers. Mostly cloudy, with a high near 32.
Friday Night
A chance of snow showers. Mostly cloudy, with a low around 20.
Saturday
Mostly cloudy, 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:
11:56 am CST Jan 11, 2026
Forecast Valid:
12pm CST Jan 11, 2026-6pm CST Jan 17, 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