Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Partly Cloudy and Windy

78°F

26°C

Humidity 48%
Wind Speed SW 26 G 38 mph
Barometer 29.82 in (1009.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 12 Apr 2:51 pm CDT
Extended Forecast for

Zion IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Partly sunny, with a high near 73. Breezy, with a south southwest wind around 25 mph, with gusts as high as 40 mph.

    High: 73 °F

    Chance
    Showers and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 1am.  Low around 58. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Showers and
    Breezy

  • Monday

    Monday: Partly sunny, with a high near 70. West southwest wind around 10 mph, with gusts as high as 20 mph.

    High: 70 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 60. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 60 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 72. Southwest wind around 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms.  Low around 52. Chance of precipitation is 80%.

    Low: 52 °F

    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms.  High near 61. Chance of precipitation is 80%.

    High: 61 °F

    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 52.

    Low: 52 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 67.

    High: 67 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 73. Breezy, with a south southwest wind around 25 mph, with gusts as high as 40 mph.
Tonight
Showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 1am. Low around 58. Breezy, with a southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Partly sunny, with a high near 70. West southwest wind around 10 mph, with gusts as high as 20 mph.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 60. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. Southwest wind around 15 mph, with gusts as high as 20 mph.
Tuesday Night
Showers and thunderstorms. Low around 52. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms. High near 61. Chance of precipitation is 80%.
Wednesday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 52.
Thursday
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 50.
Friday
Partly sunny, with a high near 71.
Friday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 50.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 61.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
2:41 pm CDT Apr 12, 2026
3pm CDT Apr 12, 2026-6pm CDT Apr 18, 2026
 
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