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

38°F

3°C

Humidity 76%
Wind Speed W 15 mph
Barometer 29.91 in (1013.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 7 Mar 11:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 34. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 58. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 58 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47. Southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 47 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 65. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. South southwest wind 5 to 10 mph becoming north northwest after midnight.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 45. Chance of precipitation is 60%.

    High: 45 °F

    Mostly Sunny
    then T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 38. Chance of precipitation is 90%.

    Low: 38 °F

    Showers

  • Wednesday

    Wednesday: Showers, mainly before noon. Cloudy, with a high near 43. Breezy.

    High: 43 °F

    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of snow showers before midnight. Mostly cloudy, with a low around 28. Blustery.

    Low: 28 °F

    Chance Snow
    Showers then
    Partly Cloudy
    and Blustery

Detailed Forecast

Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 34. West southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 58. Breezy, with a west southwest wind 15 to 20 mph, with gusts as high as 35 mph.
Sunday Night
Partly cloudy, with a low around 47. Southwest wind around 15 mph, with gusts as high as 25 mph.
Monday
Sunny, with a high near 65. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 42. South southwest wind 5 to 10 mph becoming north northwest after midnight.
Tuesday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 45. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 38. Chance of precipitation is 90%.
Wednesday
Showers, mainly before noon. Cloudy, with a high near 43. Breezy.
Wednesday Night
A chance of snow showers before midnight. Mostly cloudy, with a low around 28. Blustery.
Thursday
Partly sunny, with a high near 41.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 35. Breezy.
Friday
A chance of showers. Mostly cloudy, with a high near 55. Breezy.
Friday Night
Partly cloudy, with a low around 26.
Saturday
A chance of snow showers. Mostly cloudy, with a high near 41.
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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:
11:17 pm CST Mar 7, 2026
Forecast Valid:
11pm CST Mar 7, 2026-6pm CDT Mar 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