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.

Light Rain

37°F

3°C

Humidity 89%
Wind Speed SW 14 G 26 mph
Barometer 29.28 in (992.6 mb)
Dewpoint 34°F (1°C)
Visibility 9.00 mi
Wind Chill28°F (-2°C)
Last update 9 Dec 10:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Rain likely before 5am, then snow likely, possibly mixed with rain. Cloudy, with a low around 32. Breezy, with a southwest wind around 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain/Snow
    Likely and
    Breezy

  • Wednesday

    Wednesday: Snow, possibly mixed with rain, becoming all snow after 7am. Temperature falling to around 24 by 5pm. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 33 °F⇓

    Breezy.
    Rain/Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 12. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 12 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 24. West northwest wind 5 to 10 mph.

    High: 24 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 19. West southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 19 °F

    Chance Snow

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 29.

    High: 29 °F

    Chance Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Chance Snow
    then Mostly
    Cloudy

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 13.

    High: 13 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A chance of snow before midnight. Mostly cloudy, with a low around -1.

    Low: -1 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Tonight
Rain likely before 5am, then snow likely, possibly mixed with rain. Cloudy, with a low around 32. Breezy, with a southwest wind around 20 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday
Snow, possibly mixed with rain, becoming all snow after 7am. Temperature falling to around 24 by 5pm. Breezy, with a northwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 12. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Increasing clouds, with a high near 24. West northwest wind 5 to 10 mph.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 19. West southwest wind around 5 mph, with gusts as high as 10 mph.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 29.
Friday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 8.
Saturday
A chance of snow. Mostly cloudy, with a high near 13.
Saturday Night
A chance of snow before midnight. Mostly cloudy, with a low around -1.
Sunday
Mostly sunny, with a high near 12.
Sunday Night
Mostly cloudy, with a low around 3.
Monday
Mostly cloudy, with a high near 22.
Monday Night
Mostly cloudy, with a low around 13.
Tuesday
Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
8:16 pm CST Dec 9, 2025
Forecast Valid:
11pm CST Dec 9, 2025-6pm CST Dec 16, 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