National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fog/Mist

67°F

19°C

Humidity 91%
Wind Speed Calm
Barometer 30.07 in (1017.0 mb)
Dewpoint 64°F (18°C)
Visibility 5.00 mi
Last update 15 Jul 3:51 am CDT
Extended Forecast for

Zion IL

  • Today

    Today: Sunny, with a high near 79. Southwest wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 72. East southeast wind around 5 mph becoming south southwest after midnight.

    Low: 72 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south southwest wind becoming south southeast 5 to 10 mph in the morning.

    High: 85 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming west after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.

    Low: 66 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 72 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 79. Southwest wind 5 to 10 mph becoming east southeast in the afternoon.
Tonight
Partly cloudy, with a low around 72. East southeast wind around 5 mph becoming south southwest after midnight.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 85. Light south southwest wind becoming south southeast 5 to 10 mph in the morning.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming west after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 60%.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 66.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69.
Sunday
A chance of showers. Partly sunny, with a high near 78.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68.
Monday
Partly sunny, with a high near 78.
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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:
3:56 am CDT Jul 15, 2025
Forecast Valid:
4am CDT Jul 15, 2025-6pm CDT Jul 21, 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