National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

34°F

1°C

Humidity 73%
Wind Speed N 5 mph
Barometer 30.30 in (1026.8 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 24 Dec 1:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 32. North wind around 5 mph, with gusts as high as 10 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Patchy drizzle after 5pm. Mostly cloudy, with a high near 41. East wind around 10 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph.

    High: 41 °F

    Mostly Cloudy
    then Patchy
    Drizzle

  • Wednesday Night

    Wednesday Night: Drizzle, mainly before 10pm. Patchy fog after midnight. Otherwise, cloudy, with a low around 36. Light and variable wind becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 15 mph.

    Low: 36 °F

    Drizzle then
    Areas Drizzle
    and Patchy
    Fog

  • Christmas Day

    Christmas Day: Cloudy, with a high near 39. North northeast wind around 15 mph becoming east in the afternoon. Winds could gust as high as 25 mph.

    High: 39 °F

    Cloudy

  • Thursday Night

    Thursday Night: Rain likely after midnight. Cloudy, with a low around 36. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 36 °F

    Cloudy then
    Rain Likely

  • Friday

    Friday: Rain likely before noon. Cloudy, with a high near 43. Chance of precipitation is 60%.

    High: 43 °F

    Rain Likely
    then Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 34.

    Low: 34 °F

    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 32. North wind around 5 mph, with gusts as high as 10 mph.
Wednesday
Patchy drizzle after 5pm. Mostly cloudy, with a high near 41. East wind around 10 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
Drizzle, mainly before 10pm. Patchy fog after midnight. Otherwise, cloudy, with a low around 36. Light and variable wind becoming north northeast 5 to 10 mph after midnight. Winds could gust as high as 15 mph.
Christmas Day
Cloudy, with a high near 39. North northeast wind around 15 mph becoming east in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Rain likely after midnight. Cloudy, with a low around 36. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Friday
Rain likely before noon. Cloudy, with a high near 43. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 43.
Saturday Night
Cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 39. Breezy.
Sunday Night
Mostly cloudy, with a low around 11. Blustery.
Monday
Mostly sunny, with a high near 20. Blustery.
Monday Night
Partly cloudy, with a low around 12.
Tuesday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
2:06 am CST Dec 24, 2025
Forecast Valid:
2am CST Dec 24, 2025-6pm CST Dec 30, 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