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

45°F

7°C

Humidity 74%
Wind Speed W 7 mph
Barometer 30.12 in (1020.4 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 5 Apr 11:51 pm CDT
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Showers likely, mainly before 1am. Mostly cloudy, with a low around 38. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Showers
    Likely

  • Monday

    Monday: Partly sunny, with a high near 47. West northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 47 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of snow showers before 1am. Partly cloudy, with a low around 24. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Slight Chance
    Snow Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 35. North northeast wind around 10 mph becoming east in the afternoon.

    High: 35 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 29. Southeast wind 5 to 15 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 59. Breezy.

    High: 59 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers. Partly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance
    Showers

Detailed Forecast

Overnight
Showers likely, mainly before 1am. Mostly cloudy, with a low around 38. West northwest wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Partly sunny, with a high near 47. West northwest wind around 15 mph, with gusts as high as 25 mph.
Monday Night
A 20 percent chance of snow showers before 1am. Partly cloudy, with a low around 24. North wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 35. North northeast wind around 10 mph becoming east in the afternoon.
Tuesday Night
A slight chance of rain and snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 29. Southeast wind 5 to 15 mph. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 59. Breezy.
Wednesday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A chance of showers. Partly sunny, with a high near 62.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 41.
Friday
A chance of showers. Partly sunny, with a high near 53.
Friday Night
A chance of showers. Mostly cloudy, with a low around 40.
Saturday
A chance of showers. Partly sunny, with a high near 55.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 46.
Sunday
A chance of showers. Mostly cloudy, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.48°N 87.87°W
Last Update:
11:56 pm CDT Apr 5, 2026
Forecast Valid:
12am CDT Apr 6, 2026-6pm CDT Apr 12, 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