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.

A Few Clouds

27°F

-3°C

Humidity 89%
Wind Speed Calm
Barometer 30.53 in (1035.4 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 27 Mar 10:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Mostly clear, with a low around 25. North wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 25 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 47. North wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 47 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 40. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 60. South southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 60 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44. South southwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71.

    High: 71 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 25. North wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 47. North wind 5 to 10 mph becoming south southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly cloudy, with a low around 40. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 60. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 44. South southwest wind around 5 mph, with gusts as high as 10 mph.
Monday
Mostly sunny, with a high near 62.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 71.
Tuesday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 40.
Wednesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 32.
Thursday
A chance of rain and snow showers. Mostly cloudy, with a high near 41.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 37.
Friday
Mostly cloudy, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
8:41 pm CDT Mar 27, 2026
Forecast Valid:
11pm CDT Mar 27, 2026-6pm CDT Apr 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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