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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

38°F

3°C

Humidity 99%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 26 Dec 03:52 AM PST
Extended Forecast for

Illinois Valley OR

  • Overnight

    Overnight: Rain. Snow level 3500 feet. Low around 35. North northwest wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain

  • Friday

    Friday: Rain. Snow level 3300 feet rising to 3900 feet in the afternoon. High near 42. West northwest wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 42 °F

    Rain

  • Friday Night

    Friday Night: Showers likely, mainly before 7pm. Patchy dense fog after 4am. Snow level 2900 feet lowering to 2000 feet after midnight . Otherwise, mostly cloudy, with a low around 29. Light southwest wind. Chance of precipitation is 60%.

    Low: 29 °F

    Showers
    Likely then
    Chance
    Showers and
    Patchy Dense
    Fog

  • Saturday

    Saturday: A chance of rain and snow showers before 10am, then a chance of rain showers. Patchy fog before 10am. Snow level 1800 feet rising to 2500 feet in the afternoon. Otherwise, partly sunny, with a high near 41. Calm wind. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 41 °F

    Chance
    Rain/Snow and
    Patchy Fog
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25. Light east northeast wind.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Overnight
Rain. Snow level 3500 feet. Low around 35. North northwest wind around 5 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain. Snow level 3300 feet rising to 3900 feet in the afternoon. High near 42. West northwest wind around 6 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Showers likely, mainly before 7pm. Patchy dense fog after 4am. Snow level 2900 feet lowering to 2000 feet after midnight . Otherwise, mostly cloudy, with a low around 29. Light southwest wind. Chance of precipitation is 60%.
Saturday
A chance of rain and snow showers before 10am, then a chance of rain showers. Patchy fog before 10am. Snow level 1800 feet rising to 2500 feet in the afternoon. Otherwise, partly sunny, with a high near 41. Calm wind. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday Night
Mostly cloudy, with a low around 25. Light east northeast wind.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 31.
Tuesday
Mostly sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 33.
Wednesday
A slight chance of rain. Partly sunny, with a high near 54.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 36.
New Year's Day
Rain likely. Mostly cloudy, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.11°N 123.69°W (Elev. 1398 ft)
Last Update:
3:41 am PST Dec 26, 2025
Forecast Valid:
4am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation