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

38°F

3°C

Humidity 65%
Wind Speed E 5 mph
Barometer 30.24 in (1025.1 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 24 Mar 7:51 pm CDT
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Southeast wind 5 to 10 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 63. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers after 1pm. Partly sunny, with a high near 63. South southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.

    High: 63 °F

    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 30. North wind around 15 mph, with gusts as high as 25 mph.

    Low: 30 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. Southeast wind 5 to 10 mph.
Wednesday
Partly sunny, with a high near 63. South wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy, with a low around 48. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday
A 50 percent chance of showers after 1pm. Partly sunny, with a high near 63. South southwest wind 5 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 30. North wind around 15 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 38.
Friday Night
Mostly clear, with a low around 29.
Saturday
Sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 58.
Monday Night
A chance of showers. Mostly cloudy, with a low around 44.
Tuesday
A chance of showers. Mostly cloudy, with a high near 56.
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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:
8:06 pm CDT Mar 24, 2026
Forecast Valid:
8pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
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