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

37°F

3°C

Humidity 89%
Wind Speed SE 5 mph
Barometer 30.17 in (1022.5 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 9 Jan 9:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: A slight chance of rain between 4am and 5am, then a chance of rain and snow. Mostly cloudy, with a steady temperature around 37. Southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Saturday

    Saturday: Rain and snow, becoming all snow after 11am. Temperature falling to around 31 by 5pm. Breezy, with a south southeast wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 36 °F⇓

    Rain/Snow
    then Chance
    Snow Showers
    and Breezy

  • Saturday Night

    Saturday Night: Scattered snow showers. Mostly cloudy, with a low around 22. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

    Low: 22 °F

    Scattered
    Snow Showers
    and Blustery

  • Sunday

    Sunday: Mostly sunny, with a high near 32. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.

    High: 32 °F

    Partly Sunny
    and Breezy
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain. Mostly cloudy, with a high near 44.

    High: 44 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Rain
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
A slight chance of rain between 4am and 5am, then a chance of rain and snow. Mostly cloudy, with a steady temperature around 37. Southeast wind around 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%.
Saturday
Rain and snow, becoming all snow after 11am. Temperature falling to around 31 by 5pm. Breezy, with a south southeast wind 5 to 10 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Saturday Night
Scattered snow showers. Mostly cloudy, with a low around 22. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
Sunday
Mostly sunny, with a high near 32. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night
Partly cloudy, with a low around 26. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 33.
Tuesday
A chance of rain. Mostly cloudy, with a high near 44.
Tuesday Night
A chance of rain before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.
Wednesday
A chance of snow. Mostly cloudy, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 19.
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. Mostly cloudy, with a high near 32.
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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:
10:26 pm CST Jan 9, 2026
Forecast Valid:
10pm CST Jan 9, 2026-6pm CST Jan 16, 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