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.

Fair

17°F

-8°C

Humidity 54%
Wind Speed W 6 mph
Barometer 29.98 in (1017.4 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 2 Jan 5:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Increasing clouds, with a low around 17. Northwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 17 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 28. West wind 5 to 10 mph.

    High: 28 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 16. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 16 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Increasing clouds, with a high near 31. Northwest wind around 5 mph becoming south in the afternoon. Winds could gust as high as 10 mph.

    High: 31 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A slight chance of snow, freezing rain, and sleet before midnight. Mostly cloudy, with a low around 27. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Wintry Mix
    then Mostly
    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 34.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 17. Northwest wind around 5 mph, with gusts as high as 10 mph.
Saturday
Mostly cloudy, with a high near 28. West wind 5 to 10 mph.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 16. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Increasing clouds, with a high near 31. Northwest wind around 5 mph becoming south in the afternoon. Winds could gust as high as 10 mph.
Sunday Night
A slight chance of snow, freezing rain, and sleet before midnight. Mostly cloudy, with a low around 27. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 43.
Tuesday Night
Partly cloudy, with a low around 32.
Wednesday
Mostly sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A chance of rain. Mostly cloudy, with a high near 46.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 38.
Friday
A chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
5:56 pm CST Jan 2, 2026
Forecast Valid:
6pm CST Jan 2, 2026-6pm CST Jan 9, 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