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 96%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 26 Dec 07:52 AM PST
Extended Forecast for

17 Miles SSE Agness OR

  • Today

    Today: Rain, mainly before 4pm, then showers after 4pm. Snow level 3800 feet. High near 39. East southeast wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 39 °F

    Rain

  • Tonight

    Tonight: Rain and snow showers, becoming all snow after 2am. Snow level 2500 feet. Low around 32. North northwest wind 6 to 8 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain/Snow

  • Saturday

    Saturday: Snow showers likely before 1pm, then a chance of rain and snow showers. Snow level 2400 feet. Partly sunny, with a high near 38. North northeast wind 5 to 7 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 38 °F

    Snow Showers
    Likely then
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 30. Northeast wind around 10 mph.

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 43. East northeast wind around 10 mph.

    High: 43 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 33 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

Detailed Forecast

Today
Rain, mainly before 4pm, then showers after 4pm. Snow level 3800 feet. High near 39. East southeast wind 8 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Tonight
Rain and snow showers, becoming all snow after 2am. Snow level 2500 feet. Low around 32. North northwest wind 6 to 8 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Saturday
Snow showers likely before 1pm, then a chance of rain and snow showers. Snow level 2400 feet. Partly sunny, with a high near 38. North northeast wind 5 to 7 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Saturday Night
Mostly cloudy, with a low around 30. Northeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 43. East northeast wind around 10 mph.
Sunday Night
Partly cloudy, with a low around 33.
Monday
Sunny, with a high near 48.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 50.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 40.
New Year's Day
Rain. Snow level 4600 feet. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
Last Update:
6:52 am PST Dec 26, 2025
Forecast Valid:
8am PST Dec 26, 2025-6pm PST Jan 1, 2026
 
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