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.

Fair

66°F

19°C

Humidity 81%
Wind Speed SW 5 mph
Barometer 30.04 in (1016.1 mb)
Dewpoint 60°F (16°C)
Visibility 7.00 mi
Last update 14 Jul 12:51 am CDT
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Widespread haze. Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm.

    Low: 64 °F

    Haze

  • Monday

    Monday: Sunny, with a high near 84. Calm wind becoming south southeast around 5 mph in the morning.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68. South southeast wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Southwest wind 5 to 10 mph becoming southeast in the afternoon.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south southwest after midnight.

    Low: 71 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 80.

    High: 80 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 64.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Overnight
Widespread haze. Mostly clear, with a low around 64. Southwest wind around 5 mph becoming calm.
Monday
Sunny, with a high near 84. Calm wind becoming south southeast around 5 mph in the morning.
Monday Night
Mostly clear, with a low around 68. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 83. Southwest wind 5 to 10 mph becoming southeast in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71. Southeast wind around 5 mph becoming south southwest after midnight.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Thursday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Thursday Night
A chance of showers before 1am. Mostly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Partly sunny, with a high near 77.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 68.
Sunday
A chance of showers. 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:
1:11 am CDT Jul 14, 2025
Forecast Valid:
1am CDT Jul 14, 2025-6pm CDT Jul 20, 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