Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10375°NLon: 123.68508°WElev: 1389.0ft.

NA

37°F

3°C

Humidity 87%
Wind Speed NNE 5 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 27 Dec 09:52 PM PST
Extended Forecast for

9 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 32. East northeast wind around 11 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 41. East northeast wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 41 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 34. East northeast wind around 11 mph, with gusts as high as 21 mph.

    Low: 34 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 46. East northeast wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 46 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36. East northeast wind around 10 mph.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain, mainly after 4am.  Snow level 6000 feet. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly cloudy, with a steady temperature around 32. East northeast wind around 11 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 41. East northeast wind 9 to 13 mph, with gusts as high as 23 mph.
Sunday Night
Partly cloudy, with a low around 34. East northeast wind around 11 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 46. East northeast wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 36. East northeast wind around 10 mph.
Tuesday
Sunny, with a high near 49.
Tuesday Night
Mostly clear, with a low around 37.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
A chance of rain, mainly after 4am. Snow level 6000 feet. Mostly cloudy, with a low around 38.
New Year's Day
Rain likely, mainly after 10am. Snow level 5800 feet. Mostly cloudy, with a high near 45.
Thursday Night
Rain and snow. Snow level 5500 feet lowering to 4900 feet after midnight . Mostly cloudy, with a low around 37.
Friday
Rain and snow. Snow level 4100 feet. Mostly cloudy, with a high near 40.
Friday Night
Rain and snow likely. Snow level 3500 feet. Mostly cloudy, with a low around 35.
Saturday
Rain and snow likely. Snow level 3400 feet. Mostly cloudy, with a high near 40.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
9:41 pm PST Dec 27, 2025
10pm PST Dec 27, 2025-6pm PST Jan 3, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database