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

57°F

14°C

Humidity 64%
Wind Speed W 5 mph
Barometer 30.07 in (1017.9 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 8 Oct 8:51 am CDT
Extended Forecast for

Zion IL

  • Today

    Today: Mostly sunny, with a high near 69. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 50. West wind around 5 mph becoming calm.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 69. Light south southwest wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 40%.

    High: 69 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming clear, with a low around 58. Southeast wind around 10 mph, with gusts as high as 15 mph.

    Low: 58 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 79. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 69. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Tonight
Partly cloudy, with a low around 50. West wind around 5 mph becoming calm.
Friday
A chance of showers, with thunderstorms also possible after 4pm. Partly sunny, with a high near 69. Light south southwest wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 40%.
Friday Night
Mostly cloudy, then gradually becoming clear, with a low around 58. Southeast wind around 10 mph, with gusts as high as 15 mph.
Saturday
Sunny, with a high near 79. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 58.
Sunday
Partly sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 54.
Columbus Day
Partly sunny, with a high near 75.
Monday Night
A chance of showers. Mostly cloudy, with a low around 53.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 61.
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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:
6:21 am CDT Oct 8, 2026
Forecast Valid:
9am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
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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