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

Showers and Thunderstorms in the Southwest and Ohio Valley; Mountain Snow in the Northeast

Showers and thunderstorms, along with high-elevation snow, will begin to develop over parts of the Southwest late tonight and is expected to continue through Wednesday morning. Mountain snow over parts the Northeast will continue through Tuesday. A few strong to severe storms and heavy rainfall are possible across portions of the Lower Ohio Valley Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Overcast

41°F

5°C

Humidity 89%
Wind Speed E 8 mph
Barometer 30.03 in (1017.5 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 18 Nov 4:51 am CST
Extended Forecast for

Zion IL

  • Overnight

    Overnight: Showers. Low around 39. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Showers

  • Tuesday

    Tuesday: Showers with a chance of drizzle, mainly before 10am, then a chance of drizzle after 4pm. High near 42. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 42 °F

    Showers then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Cloudy, with a low around 37. East northeast wind 5 to 10 mph.

    Low: 37 °F

    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 44. East southeast wind around 5 mph, with gusts as high as 10 mph.

    High: 44 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 54.

    High: 54 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers. Low around 39. East southeast wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Showers with a chance of drizzle, mainly before 10am, then a chance of drizzle after 4pm. High near 42. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Cloudy, with a low around 37. East northeast wind 5 to 10 mph.
Wednesday
Mostly cloudy, with a high near 44. East southeast wind around 5 mph, with gusts as high as 10 mph.
Wednesday Night
Mostly cloudy, with a low around 40. Calm wind.
Thursday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 54.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly sunny, with a high near 47.
Friday Night
Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
Last Update:
4:11 am CST Nov 18, 2025
Forecast Valid:
5am CST Nov 18, 2025-6pm CST Nov 24, 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