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 82%
Wind Speed E 10 mph
Barometer 30.11 in (1020.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 3 Mar 5:51 am CST
Extended Forecast for

Zion IL

  • Today

    Today: A slight chance of rain before 7am, then isolated sprinkles between 7am and 9am. Mostly cloudy, with a high near 38. 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: 38 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Tonight

    Tonight: 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. Northeast wind around 10 mph, with gusts as high as 15 mph. 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. High near 56. Chance of precipitation is 80%.

    High: 56 °F

    Showers

  • Friday Night

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

    Low: 51 °F

    Showers

  • Saturday

    Saturday: A chance of showers before noon. Mostly cloudy, with a high near 61.

    High: 61 °F

    Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
A slight chance of rain before 7am, then isolated sprinkles between 7am and 9am. Mostly cloudy, with a high near 38. 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%.
Tonight
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. Northeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%.
Thursday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 38.
Friday
Showers. High near 56. Chance of precipitation is 80%.
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:
6:17 am CST Mar 3, 2026
Forecast Valid:
6am 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