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

59°F

15°C

Humidity 78%
Wind Speed E 12 mph
Barometer 30.16 in (1021.1 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 15 Oct 1:51 am CDT
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 58. East wind around 10 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers, mainly after 1pm. High near 62. East southeast wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 62 °F

    Scattered
    Showers then
    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 10pm. Low around 50. Breezy, with a southeast wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 50 °F

    Showers then
    Isolated
    Showers and
    Breezy

  • Friday

    Friday: Showers likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 52. Breezy, with a west northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%.

    High: 52 °F

    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: Scattered showers, mainly before 7pm. Partly cloudy, with a low around 37. Breezy, with a north wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 30%.

    Low: 37 °F

    Scattered
    Showers and
    Breezy

  • Saturday

    Saturday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 58. East wind around 10 mph, with gusts as high as 20 mph.
Thursday
Showers, mainly after 1pm. High near 62. East southeast wind 10 to 15 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 10pm. Low around 50. Breezy, with a southeast wind 10 to 15 mph becoming west northwest 15 to 20 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers likely, mainly between 10am and 4pm. Mostly cloudy, with a high near 52. Breezy, with a west northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%.
Friday Night
Scattered showers, mainly before 7pm. Partly cloudy, with a low around 37. Breezy, with a north wind 20 to 25 mph decreasing to 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 55.
Saturday Night
Clear, with a low around 43.
Sunday
Sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 43.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 66.
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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:
2:36 am CDT Oct 15, 2026
Forecast Valid:
2am CDT Oct 15, 2026-6pm CDT Oct 21, 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