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.

Overcast

37°F

3°C

Humidity 96%
Wind Speed NE 13 mph
Barometer 30.06 in (1018.5 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 3 Apr 10:51 pm CDT
Extended Forecast for

Zion IL

Flood Watch until April 4, 10:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until April 4, 10:00am

    NOW until 10:00am Sat

    Flood Watch

  • Tonight

    Low: 39 °F⇑

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Mostly cloudy, with a high near 55. Breezy, with a south wind 10 to 15 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

    High: 55 °F

    Breezy.
    Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 35 °F

    Mostly Cloudy
    and Breezy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 49. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 49 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 37. West wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 37 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

Tonight
Showers and possibly a thunderstorm. Temperature rising to around 42 by 3am. Northeast wind 10 to 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.
Saturday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Mostly cloudy, with a high near 55. Breezy, with a south wind 10 to 15 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 35. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 49. West northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 37. West wind 5 to 10 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 47.
Monday Night
Partly cloudy, with a low around 27.
Tuesday
Mostly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 58.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 47.
Thursday
A chance of showers. Mostly cloudy, with a high near 58.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 43.
Friday
A chance of showers. Mostly cloudy, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
10:06 pm CDT Apr 3, 2026
Forecast Valid:
10pm CDT Apr 3, 2026-6pm CDT Apr 10, 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