National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

22°F

-6°C

Humidity 66%
Wind Speed S 10 mph
Barometer 30.12 in (1021.9 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 18 Mar 12:51 am CDT
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Snow, mainly after 1am. Temperature rising to around 24 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.

    Low: 20 °F⇑

    Snow

  • Wednesday

    Wednesday: A chance of snow and freezing rain before 8am, then a slight chance of snow between 8am and 9am. Mostly cloudy, with a high near 38. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 38 °F

    Chance Wintry
    Mix then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 36. Southwest wind around 5 mph.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 44. South southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.

    High: 44 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 36. North wind around 5 mph becoming south after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 51.

    High: 51 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow, mainly after 1am. Temperature rising to around 24 by 5am. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of less than one inch possible.
Wednesday
A chance of snow and freezing rain before 8am, then a slight chance of snow between 8am and 9am. Mostly cloudy, with a high near 38. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 36. Southwest wind around 5 mph.
Thursday
A 20 percent chance of showers before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 44. South southwest wind around 5 mph becoming north in the afternoon. Winds could gust as high as 10 mph.
Thursday Night
Mostly cloudy, with a low around 36. North wind around 5 mph becoming south after midnight.
Friday
Mostly cloudy, with a high near 51.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Partly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 30.
Monday
Mostly sunny, with a high near 38.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly cloudy, with a high near 44.
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:
8:51 pm CDT Mar 17, 2026
Forecast Valid:
12am CDT Mar 18, 2026-6pm CDT Mar 24, 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