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.

Mostly Cloudy

76°F

24°C

Humidity 85%
Wind Speed Calm
Barometer 30.09 in (1017.4 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 30 Jul 6:51 am CDT
Extended Forecast for

Zion IL

Flood Watch July 30, 01:00pm until July 31, 01:00pm
Click here for hazard details and duration
Flood Watch

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 76. North northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    T-storms
    Likely then
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm. Low around 67. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Showers

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 71. North northeast wind around 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 63. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 72. Northeast wind 10 to 15 mph.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 76. North northeast wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and possibly a thunderstorm. Low around 67. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 71. North northeast wind around 15 mph, with gusts as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 63. East northeast wind 10 to 15 mph, with gusts as high as 25 mph.
Friday
Sunny, with a high near 72. Northeast wind 10 to 15 mph.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 75.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 76.
Sunday Night
Partly cloudy, with a low around 63.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 66.
Tuesday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
5:06 am CDT Jul 30, 2025
Forecast Valid:
7am CDT Jul 30, 2025-6pm CDT Aug 5, 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