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.

Fair

62°F

17°C

Humidity 26%
Wind Speed SW 12 mph
Barometer 30.02 in (1016.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 29 Mar 4:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Partly cloudy, with a low around 46. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a temperature rising to around 61 by 1am. East northeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 50 °F⇑

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. High near 74. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%.

    High: 74 °F

    Showers and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 10pm, then showers likely. Low around 36. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 36 °F

    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 38. Breezy.

    High: 38 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely, mainly after 1am. Cloudy, with a low around 34. Windy. Chance of precipitation is 70%.

    Low: 34 °F

    Chance
    Showers and
    Breezy then
    Showers
    Likely and
    Windy

  • Thursday

    Thursday: Showers likely. Cloudy, with a high near 42. Windy.

    High: 42 °F

    Showers
    Likely and
    Windy

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Cloudy, with a low around 37. Breezy.

    Low: 37 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 65. Southwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a temperature rising to around 61 by 1am. East northeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Showers and possibly a thunderstorm. High near 74. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%.
Tuesday Night
Showers and possibly a thunderstorm before 10pm, then showers likely. Low around 36. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Wednesday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 38. Breezy.
Wednesday Night
Showers likely, mainly after 1am. Cloudy, with a low around 34. Windy. Chance of precipitation is 70%.
Thursday
Showers likely. Cloudy, with a high near 42. Windy.
Thursday Night
Showers likely, mainly before 1am. Cloudy, with a low around 37. Breezy.
Friday
Mostly cloudy, with a high near 46.
Friday Night
A chance of showers. Mostly cloudy, with a low around 39.
Saturday
Showers likely. Mostly cloudy, with a high near 58.
Saturday Night
Showers likely. Cloudy, with a low around 41.
Sunday
A chance of showers. Mostly cloudy, with a high near 52. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
3:41 pm CDT Mar 29, 2026
Forecast Valid:
5pm CDT Mar 29, 2026-6pm CDT Apr 5, 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