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

36°F

2°C

Humidity 93%
Wind Speed S 3 mph
Barometer 29.97 in (1015.5 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 27 Dec 12:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Cloudy, with a low around 36. North wind around 5 mph becoming calm.

    Low: 36 °F

    Cloudy

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, cloudy, with a high near 41. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 41 °F

    Patchy Fog
    then Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of showers or drizzle after 9pm. Patchy fog after 9pm. Otherwise, cloudy, with a temperature rising to around 44 by 5am. South southeast wind 5 to 10 mph.

    Low: 40 °F⇑

    Chance
    Showers and
    Patchy Fog

  • Sunday

    Sunday: Showers, mainly after noon. Areas of fog before 9am. High near 54. South southeast wind 5 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    High: 54 °F

    Scattered
    Showers and
    Areas Fog
    then Showers

  • Sunday Night

    Sunday Night: Rain likely before 9pm, then rain and snow likely between 9pm and midnight, then a chance of snow after midnight. Cloudy, with a low around 21. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 70%.

    Low: 21 °F

    Windy.
    Rain/Snow
    Likely then
    Chance Snow

  • Monday

    Monday: Snow likely, mainly before noon. Mostly cloudy, with a high near 26. Windy. Chance of precipitation is 60%.

    High: 26 °F

    Windy. Snow
    Likely then
    Chance Snow

  • Monday Night

    Monday Night: Partly cloudy, with a low around 14. Blustery.

    Low: 14 °F

    Partly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 36. North wind around 5 mph becoming calm.
Saturday
Patchy fog before 10am. Otherwise, cloudy, with a high near 41. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
A 50 percent chance of showers or drizzle after 9pm. Patchy fog after 9pm. Otherwise, cloudy, with a temperature rising to around 44 by 5am. South southeast wind 5 to 10 mph.
Sunday
Showers, mainly after noon. Areas of fog before 9am. High near 54. South southeast wind 5 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Sunday Night
Rain likely before 9pm, then rain and snow likely between 9pm and midnight, then a chance of snow after midnight. Cloudy, with a low around 21. Windy, with a west wind 15 to 20 mph increasing to 25 to 30 mph after midnight. Winds could gust as high as 45 mph. Chance of precipitation is 70%.
Monday
Snow likely, mainly before noon. Mostly cloudy, with a high near 26. Windy. Chance of precipitation is 60%.
Monday Night
Partly cloudy, with a low around 14. Blustery.
Tuesday
Partly sunny, with a high near 28.
Tuesday Night
Mostly cloudy, with a low around 22.
Wednesday
Mostly cloudy, with a high near 29.
Wednesday Night
Partly cloudy, with a low around 10.
New Year's Day
Sunny, with a high near 17.
Thursday Night
Mostly clear, with a low around 6.
Friday
Mostly sunny, with a high near 20.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
1:16 am CST Dec 27, 2025
Forecast Valid:
1am CST Dec 27, 2025-6pm CST Jan 2, 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