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

33°F

1°C

Humidity 78%
Wind Speed E 5 mph
Barometer 30.16 in (1022.6 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 3 Mar 4:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Isolated showers. Mostly cloudy, with a steady temperature around 33. East southeast wind around 5 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Isolated
    Showers

  • Tuesday

    Tuesday: Isolated showers before 7am, then isolated sprinkles between 7am and 9am. Mostly cloudy, with a high near 39. East southeast wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 10 mph. Chance of precipitation is 20%.

    High: 39 °F

    Isolated
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32. East northeast wind around 5 mph becoming calm.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers after 3pm. Partly sunny, with a high near 39. East wind 5 to 10 mph.

    High: 39 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 37. East northeast wind 5 to 10 mph.

    Low: 37 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Thursday

    Thursday: Showers likely. Cloudy, with a high near 42. Chance of precipitation is 70%.

    High: 42 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Showers. Cloudy, with a high near 56.

    High: 56 °F

    Showers

  • Friday Night

    Friday Night: Showers. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Showers

Detailed Forecast

Overnight
Isolated showers. Mostly cloudy, with a steady temperature around 33. East southeast wind around 5 mph. Chance of precipitation is 20%.
Tuesday
Isolated showers before 7am, then isolated sprinkles between 7am and 9am. Mostly cloudy, with a high near 39. East southeast wind around 5 mph becoming north northeast in the afternoon. Winds could gust as high as 10 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 32. East northeast wind around 5 mph becoming calm.
Wednesday
A 20 percent chance of showers after 3pm. Partly sunny, with a high near 39. East wind 5 to 10 mph.
Wednesday Night
A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 37. East northeast wind 5 to 10 mph.
Thursday
Showers likely. Cloudy, with a high near 42. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 38.
Friday
Showers. Cloudy, with a high near 56.
Friday Night
Showers. Mostly cloudy, with a low around 51.
Saturday
A chance of showers before noon. Mostly cloudy, with a high near 61.
Saturday Night
Mostly clear, with a low around 37.
Sunday
Sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
5:16 am CST Mar 3, 2026
Forecast Valid:
5am CST Mar 3, 2026-6pm CDT Mar 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