Cold Temperatures for the Eastern U.S.; Lake Effect Snow in the Great Lakes; Heavy Rain in the Pacific Northwest

Cold temperatures will continue across much of the eastern U.S. into today. Heavy lake effect snow continues into today east of Lakes Erie and Ontario. Two Pacific cold fronts will cross the Pacific Northwest early this week followed by another atmospheric river. Heavy rain and gusty winds are expected through midweek, with the potential for renewed urban and river flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Chicago/Waukegan Regional Airport (KUGN)

Lat: 42.43°NLon: 87.86°WElev: 709ft.

Fair

19°F

-7°C

Humidity 68%
Wind Speed SW 9 mph
Barometer 30.05 in (1019.8 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 15 Dec 4:51 pm CST
Extended Forecast for

Zion IL

  • Tonight

    Tonight: Partly cloudy, with a low around 15. West southwest wind around 5 mph, with gusts as high as 15 mph.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36. South southwest wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 38. West northwest wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

    High: 38 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after midnight.  Mostly cloudy, with a low around 32. South wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain before noon, then a chance of rain and snow.  High near 44. Breezy.  Chance of precipitation is 90%.

    High: 44 °F

    Rain then
    Chance
    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight.  Mostly cloudy, with a low around 13.

    Low: 13 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 28.

    High: 28 °F

    Partly Sunny

  • Friday Night

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

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 15. West southwest wind around 5 mph, with gusts as high as 15 mph.
Tuesday
Mostly sunny, with a high near 36. South southwest wind 5 to 15 mph, with gusts as high as 30 mph.
Tuesday Night
Mostly cloudy, with a low around 30. Southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 25 mph.
Wednesday
Mostly sunny, with a high near 38. West northwest wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.
Wednesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 32. South wind 10 to 15 mph, with gusts as high as 30 mph.
Thursday
Rain before noon, then a chance of rain and snow. High near 44. Breezy. Chance of precipitation is 90%.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Friday
Partly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 22.
Saturday
Mostly cloudy, with a high near 40.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 26.
Monday
Mostly cloudy, with a high near 37.
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ABOUT THIS FORECAST

 
Point Forecast:
Zion IL
 42.45°N 87.84°W
3:50 pm CST Dec 15, 2025
5pm CST Dec 15, 2025-6pm CST Dec 22, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database