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

62°F

17°C

Humidity 73%
Wind Speed SE 10 mph
Barometer 29.86 in (1011.1 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 17 Apr 11:51 am CDT
Extended Forecast for

Zion IL

Flood Watch April 17, 03:00pm until April 18, 05:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 67. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 67 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Showers and thunderstorms before 3am, then a chance of showers. Low around 43. Breezy, with a south wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    T-storms and
    Breezy then
    Showers
    Likely

  • Saturday

    Saturday: A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 48. West northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 35. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 48. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 1am. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Partly Cloudy
    then Patchy
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 50.

    High: 50 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 67. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
Showers and thunderstorms before 3am, then a chance of showers. Low around 43. Breezy, with a south wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A 10 percent chance of showers before 7am. Cloudy through mid morning, then gradual clearing, with a high near 48. West northwest wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 35. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Sunday
Mostly sunny, with a high near 48. West northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Patchy frost after 1am. Otherwise, mostly clear, with a low around 34.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 50.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Sunny, with a high near 55.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
11:01 am CDT Apr 17, 2026
Forecast Valid:
12pm CDT Apr 17, 2026-6pm CDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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