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

34°F

1°C

Humidity 79%
Wind Speed W 9 mph
Barometer 29.86 in (1012.0 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 27 Feb 1:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Clear, with a low around 29. West southwest wind around 10 mph.

    Low: 29 °F

    Clear

  • Friday

    Friday: Mostly sunny, with a high near 59. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 59 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. West wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North northeast wind around 10 mph, with gusts as high as 20 mph.

    High: 33 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22. North wind around 10 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 29. West southwest wind around 10 mph.
Friday
Mostly sunny, with a high near 59. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph.
Friday Night
Partly cloudy, with a low around 28. West wind 10 to 15 mph becoming north northwest after midnight. Winds could gust as high as 25 mph.
Saturday
A 50 percent chance of snow after noon. Mostly cloudy, with a high near 33. North northeast wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 22. North wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 29.
Sunday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 23.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 29.
Tuesday
A chance of rain. Mostly cloudy, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of rain. Partly sunny, with a high near 41.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 37.
Thursday
Rain likely. Partly sunny, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
12:21 am CST Feb 27, 2026
Forecast Valid:
2am CST Feb 27, 2026-6pm CST Mar 5, 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