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

Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

23°F

-5°C

Humidity 65%
Wind Speed N 6 mph
Barometer 29.96 in (1016.0 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 11 Dec 1:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Partly cloudy, with a low around 16. West northwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 24. West wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 24 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly between 8pm and 3am. Cloudy, with a low around 19. West wind around 5 mph becoming north after midnight.

    Low: 19 °F

    Chance Snow

  • Friday

    Friday: A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 28. West wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 28 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 5. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 5 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow. Mostly cloudy and cold, with a high near 10.

    High: 10 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around -2.

    Low: -2 °F

    Chance Snow
    then Partly
    Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 12.

    High: 12 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 3.

    Low: 3 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 16. West northwest wind around 10 mph, with gusts as high as 15 mph.
Thursday
Partly sunny, with a high near 24. West wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A 30 percent chance of snow, mainly between 8pm and 3am. Cloudy, with a low around 19. West wind around 5 mph becoming north after midnight.
Friday
A 30 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 28. West wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 5. West northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
A 30 percent chance of snow. Mostly cloudy and cold, with a high near 10.
Saturday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around -2.
Sunday
Mostly sunny, with a high near 12.
Sunday Night
Mostly cloudy, with a low around 3.
Monday
Partly sunny, with a high near 23.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 34.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly cloudy, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.81°W
Last Update:
1:51 am CST Dec 11, 2025
Forecast Valid:
2am CST Dec 11, 2025-6pm CST Dec 17, 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