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

Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

Lat: 42.10386°NLon: 123.68519°WElev: 1389.0ft.

NA

58°F

14°C

Humidity 56%
Wind Speed WSW 8 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 12 Apr 05:52 PM PDT
Extended Forecast for

9 Miles WNW Illinois Valley OR

  • Tonight

    Tonight: Rain likely, mainly after 5am. Snow level 4500 feet. Mostly cloudy, with a low around 37. West southwest wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 2pm. Snow level 4500 feet. Partly sunny, with a high near 43. West wind 3 to 8 mph. Chance of precipitation is 60%.

    High: 43 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before 11pm. Snow level 4700 feet lowering to 3700 feet after midnight . Mostly cloudy, with a low around 35. West wind 3 to 8 mph.

    Low: 35 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm. Snow level rising to 4000 feet in the afternoon. Partly sunny, with a high near 44. Light west southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 44 °F

    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain. Snow level 4000 feet rising to 4700 feet after midnight. Low around 39. South southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Wednesday

    Wednesday: Snow, possibly mixed with rain. Snow level 5000 feet lowering to 4400 feet in the afternoon . High near 41. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 8pm. Mostly cloudy, with a low around 30. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Thursday

    Thursday: A chance of snow before 2pm, then a slight chance of rain. Mostly sunny, with a high near 47.

    High: 47 °F

    Chance Snow
    then Slight
    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain likely, mainly after 5am. Snow level 4500 feet. Mostly cloudy, with a low around 37. West southwest wind 5 to 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely, mainly before 2pm. Snow level 4500 feet. Partly sunny, with a high near 43. West wind 3 to 8 mph. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of rain before 11pm. Snow level 4700 feet lowering to 3700 feet after midnight . Mostly cloudy, with a low around 35. West wind 3 to 8 mph.
Tuesday
A slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm. Snow level rising to 4000 feet in the afternoon. Partly sunny, with a high near 44. Light west southwest wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Tuesday Night
Rain. Snow level 4000 feet rising to 4700 feet after midnight. Low around 39. South southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Snow, possibly mixed with rain. Snow level 5000 feet lowering to 4400 feet in the afternoon . High near 41. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow likely, becoming all snow after 8pm. Mostly cloudy, with a low around 30. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow before 2pm, then a slight chance of rain. Mostly sunny, with a high near 47.
Thursday Night
Mostly clear, with a low around 32.
Friday
Sunny, with a high near 55.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
A chance of rain. Snow level 6000 feet. Mostly cloudy, with a low around 43.
Sunday
Rain likely. Snow level 5800 feet lowering to 5200 feet in the afternoon . Mostly cloudy, with a high near 50.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
9 Miles WNW Illinois Valley OR
 42.15°N 123.85°W (Elev. 3356 ft)
Last Update:
4:56 pm PDT Apr 12, 2026
Forecast Valid:
6pm PDT Apr 12, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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