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.

Fair

83°F

28°C

Humidity 49%
Wind Speed SE 9 mph
Barometer 30.12 in (1018.7 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 3 Oct 3:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Mostly clear, with a low around 66. South southeast wind around 5 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. South southwest wind 5 to 15 mph.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 66. South southwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 66 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 76. Chance of precipitation is 50%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 1am. Low around 56. Chance of precipitation is 80%.

    Low: 56 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers before 1pm. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 66. South southeast wind around 5 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 87. South southwest wind 5 to 15 mph.
Saturday Night
Mostly clear, with a low around 66. South southwest wind around 10 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 81. South wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 76. Chance of precipitation is 50%.
Monday Night
Showers likely and possibly a thunderstorm, then showers after 1am. Low around 56. Chance of precipitation is 80%.
Tuesday
A chance of showers before 1pm. Partly sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Sunny, with a high near 63.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 64.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
4:11 pm CDT Oct 3, 2025
Forecast Valid:
4pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
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