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

41°F

5°C

Humidity 92%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 13 Apr 02:52 AM PDT
Extended Forecast for

17 Miles WNW Illinois Valley OR

  • Overnight

    Overnight: A chance of rain and snow showers, mainly after 4am. Snow level 4500 feet. Mostly cloudy, with a low around 37. Light west wind. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 37 °F

    Chance
    Rain/Snow

  • Monday

    Monday: Rain and snow showers likely, mainly before 2pm. Snow level 4500 feet. Mostly cloudy, with a high near 41. Calm wind becoming west 5 to 9 mph in the morning. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 41 °F

    Rain/Snow
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. West wind 5 to 9 mph becoming calm in the evening.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow showers after 11am. Partly sunny, with a high near 42. Light southwest wind becoming west southwest 12 to 17 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 42 °F

    Slight Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: Snow showers before 2am, then rain, possibly mixed with snow showers. Low around 38. Breezy, with a south southwest wind 18 to 28 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 38 °F

    Breezy. Snow
    Showers then
    Rain/Snow

  • Wednesday

    Wednesday: Rain showers before 11am, then rain, possibly mixed with snow showers between 11am and 2pm, then snow showers after 2pm. Snow level 5200 feet lowering to 4300 feet in the afternoon . High near 42. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Rain/Snow and
    Windy

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before 11pm. Low around 32. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Snow Showers
    then Chance
    Snow Showers

  • Thursday

    Thursday: A chance of snow, mainly before 11am. Mostly sunny, with a high near 45.

    High: 45 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of rain and snow showers, mainly after 4am. Snow level 4500 feet. Mostly cloudy, with a low around 37. Light west wind. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday
Rain and snow showers likely, mainly before 2pm. Snow level 4500 feet. Mostly cloudy, with a high near 41. Calm wind becoming west 5 to 9 mph in the morning. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday Night
Mostly cloudy, with a low around 33. West wind 5 to 9 mph becoming calm in the evening.
Tuesday
A 20 percent chance of snow showers after 11am. Partly sunny, with a high near 42. Light southwest wind becoming west southwest 12 to 17 mph in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Snow showers before 2am, then rain, possibly mixed with snow showers. Low around 38. Breezy, with a south southwest wind 18 to 28 mph, with gusts as high as 34 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday
Rain showers before 11am, then rain, possibly mixed with snow showers between 11am and 2pm, then snow showers after 2pm. Snow level 5200 feet lowering to 4300 feet in the afternoon . High near 42. Windy. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow showers, mainly before 11pm. Low around 32. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
A chance of snow, mainly before 11am. Mostly sunny, with a high near 45.
Thursday Night
Mostly clear, with a low around 34.
Friday
Mostly sunny, with a high near 54.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
A slight chance of rain. Snow level 4500 feet rising to 5100 feet in the afternoon. Partly sunny, with a high near 52.
Saturday Night
A chance of rain. Snow level 5400 feet. Mostly cloudy, with a low around 42.
Sunday
Rain likely. Snow level 5100 feet lowering to 4300 feet. Mostly cloudy, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles WNW Illinois Valley OR
 42.18°N 123.98°W (Elev. 4344 ft)
Last Update:
1:01 am PDT Apr 13, 2026
Forecast Valid:
3am PDT Apr 13, 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