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

32°F

0°C

Humidity 92%
Wind Speed Calm
Barometer 30.24 in (1024.9 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 19 Apr 10:51 pm CDT
Extended Forecast for

Zion IL

Freeze Warning April 20, 12:00am until April 20, 09:00am
Click here for hazard details and duration
Freeze Warning

  • Tonight

    Tonight: Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a steady temperature around 35. North northeast wind around 5 mph.

    Low: 35 °F

    Frost

  • Monday

    Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 42. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 42 °F

    Frost then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a temperature rising to around 46 by 4am. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 42 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 67. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 67 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. West southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 56.

    Low: 56 °F

    Showers
    Likely

Detailed Forecast

Tonight
Widespread frost, mainly after 1am. Otherwise, partly cloudy, with a steady temperature around 35. North northeast wind around 5 mph.
Monday
Widespread frost before 8am. Otherwise, sunny, with a high near 42. Light east wind becoming southeast 5 to 10 mph in the morning.
Monday Night
Mostly cloudy, with a temperature rising to around 46 by 4am. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 67. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 45. West southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.
Wednesday
Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 56.
Friday
A chance of showers. Mostly cloudy, with a high near 67.
Friday Night
A chance of showers. Mostly cloudy, with a low around 44.
Saturday
Partly sunny, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
9:21 pm CDT Apr 19, 2026
Forecast Valid:
10pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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