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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

45°F

7°C

Humidity 98%
Wind Speed NNE 0 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 01 Jan 10:52 AM PST
Extended Forecast for

14 Miles S Murphy OR

  • New Year's Day

    New Year's Day: Rain, mainly after 1pm. High near 48. South wind around 7 mph. Chance of precipitation is 90%.

    High: 48 °F

    Rain

  • Tonight

    Tonight: Rain, mainly before 4am. Low around 42. South southwest wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 48. South southeast wind 3 to 6 mph.

    High: 48 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain, mainly after 10pm. Snow level 6200 feet. Low around 42. South wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain

  • Saturday

    Saturday: Rain. Snow level 5400 feet. High near 44. South southeast wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain

  • Saturday Night

    Saturday Night: Rain. Snow level 5300 feet. Low around 41. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 41 °F

    Rain

  • Sunday

    Sunday: Rain. Snow level 5000 feet. High near 41. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 41 °F

    Rain

  • Sunday Night

    Sunday Night: Rain before 1am, then rain likely, possibly mixed with snow. Snow level 4600 feet. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Rain then
    Rain/Snow
    Likely

  • Monday

    Monday: Rain likely, possibly mixed with snow, mainly before 4pm. Snow level 4200 feet. Mostly cloudy, with a high near 40.

    High: 40 °F

    Rain/Snow
    Likely

Detailed Forecast

New Year's Day
Rain, mainly after 1pm. High near 48. South wind around 7 mph. Chance of precipitation is 90%.
Tonight
Rain, mainly before 4am. Low around 42. South southwest wind 8 to 10 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 30 percent chance of rain, mainly after 10am. Partly sunny, with a high near 48. South southeast wind 3 to 6 mph.
Friday Night
Rain, mainly after 10pm. Snow level 6200 feet. Low around 42. South wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain. Snow level 5400 feet. High near 44. South southeast wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Snow level 5300 feet. Low around 41. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Sunday
Rain. Snow level 5000 feet. High near 41. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday Night
Rain before 1am, then rain likely, possibly mixed with snow. Snow level 4600 feet. Mostly cloudy, with a low around 38.
Monday
Rain likely, possibly mixed with snow, mainly before 4pm. Snow level 4200 feet. Mostly cloudy, with a high near 40.
Monday Night
A chance of rain and snow, mainly before 10pm. Snow level 4200 feet. Mostly cloudy, with a low around 34.
Tuesday
A slight chance of rain and snow. Snow level 3800 feet rising to 4400 feet in the afternoon. Partly sunny, with a high near 41.
Tuesday Night
A chance of rain and snow. Snow level 4400 feet. Mostly cloudy, with a low around 35.
Wednesday
Rain and snow likely. Snow level 4100 feet. Partly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
14 Miles S Murphy OR
 42.15°N 123.34°W (Elev. 3570 ft)
Last Update:
9:41 am PST Jan 1, 2026
Forecast Valid:
11am PST Jan 1, 2026-6pm PST Jan 7, 2026
 
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Additional Resources

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Chance of Precipitation