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

29°F

-2°C

Humidity 100%
Wind Speed E 3 mph
Barometer 30.29 in (1026.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 20 Apr 3:51 am CDT
Extended Forecast for

Zion IL

Freeze Warning April 20, 04:44am until April 20, 09:00am
Click here for hazard details and duration
...
  •  
    Freeze Warning April 20, 04:44am until April 20, 09:00am

    NOW until 9:00am Mon

    Freeze Warning

  • Today

    High: 44 °F

    Frost then
    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 42. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 71 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 44. West southwest wind around 5 mph becoming north after midnight. Winds could gust as high as 10 mph.

    Low: 44 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56. North wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.

    High: 56 °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 70.

    High: 70 °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

Today
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 44. Southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, with a low around 42. South wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 71. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 44. 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 56. North wind around 5 mph becoming east in the afternoon. Winds could gust as high as 10 mph.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 70.
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 before 1am. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
2:51 am CDT Apr 20, 2026
Forecast Valid:
4am CDT Apr 20, 2026-6pm CDT Apr 26, 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