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

18°F

-8°C

Humidity 68%
Wind Speed N 8 mph
Barometer 30.26 in (1026.8 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 7 Dec 5:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Scattered snow showers, mainly before 1am. Cloudy, with a low around 17. North wind 5 to 15 mph becoming east southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%.

    Low: 17 °F

    Scattered
    Snow Showers

  • Monday

    Monday: Mostly cloudy, with a high near 26. Southeast wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 26 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of snow. Mostly cloudy, with a temperature falling to near 21 by 8pm, then rising to around 27 during the remainder of the night. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.

    Low: 21 °F⇑

    Slight Chance
    Snow and
    Breezy

  • Tuesday

    Tuesday: A slight chance of rain and snow between noon and 3pm, then a slight chance of rain after 3pm. Cloudy, with a high near 36. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 36 °F

    Cloudy and
    Breezy then
    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain, possibly mixed with snow, becoming all rain after 9pm. Low around 34. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

    Low: 34 °F

    Breezy.
    Rain/Snow
    then Rain
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 36. Breezy. Chance of precipitation is 50%.

    High: 36 °F

    Breezy.
    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow

  • Thursday

    Thursday: A chance of snow after noon. Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Chance Snow

Detailed Forecast

Tonight
Scattered snow showers, mainly before 1am. Cloudy, with a low around 17. North wind 5 to 15 mph becoming east southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Monday
Mostly cloudy, with a high near 26. Southeast wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a temperature falling to near 21 by 8pm, then rising to around 27 during the remainder of the night. Breezy, with a south southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Tuesday
A slight chance of rain and snow between noon and 3pm, then a slight chance of rain after 3pm. Cloudy, with a high near 36. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tuesday Night
Rain, possibly mixed with snow, becoming all rain after 9pm. Low around 34. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
Wednesday
A chance of rain and snow before noon, then a slight chance of snow. Mostly cloudy, with a high near 36. Breezy. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 18.
Thursday
A chance of snow after noon. Partly sunny, with a high near 25.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 12.
Friday
A chance of snow. Mostly cloudy, with a high near 20.
Friday Night
A chance of snow. Mostly cloudy, with a low around 5.
Saturday
Partly sunny, with a high near 12.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 17.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
6:25 pm CST Dec 7, 2025
Forecast Valid:
6pm CST Dec 7, 2025-6pm CST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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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