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

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

41°F

5°C

Humidity 100%
Wind Speed SSW 1 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 12 Apr 03:52 AM PDT
Extended Forecast for

15 Miles ESE Cave Junction OR

  • Overnight

    Overnight: A 40 percent chance of snow. Mostly cloudy, with a low around 33. Light south wind. Total nighttime snow accumulation of less than a half inch possible.

    Low: 33 °F

    Chance Snow

  • Sunday

    Sunday: Rain, possibly mixed with snow showers. Some thunder is also possible. Snow level rising to 5200 feet in the afternoon. High near 42. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow likely before 11pm, then a chance of snow. Mostly cloudy, with a low around 34. West wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Monday

    Monday: A chance of snow before 11am, then snow likely, possibly mixed with rain between 11am and 2pm, then rain likely after 2pm. Snow level rising to 5200 feet in the afternoon. Mostly cloudy, with a high near 42. Light west wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 42 °F

    Rain/Snow
    Likely

  • Monday Night

    Monday Night: A chance of rain, mixing with snow after 8pm, then gradually ending. Snow level 5400 feet lowering to 4700 feet after midnight . Mostly cloudy, with a low around 33. West northwest wind 5 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain after 5pm. Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before 8pm, then snow. Low around 36. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 36 °F

    Rain/Snow
    then Snow

  • Wednesday

    Wednesday: Snow, possibly mixed with rain. Snow level 4800 feet. Cloudy, with a high near 38.

    High: 38 °F

    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 8pm. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Rain/Snow
    Likely then
    Chance Snow

Detailed Forecast

Overnight
A 40 percent chance of snow. Mostly cloudy, with a low around 33. Light south wind. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Rain, possibly mixed with snow showers. Some thunder is also possible. Snow level rising to 5200 feet in the afternoon. High near 42. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Sunday Night
Rain and snow likely before 11pm, then a chance of snow. Mostly cloudy, with a low around 34. West wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday
A chance of snow before 11am, then snow likely, possibly mixed with rain between 11am and 2pm, then rain likely after 2pm. Snow level rising to 5200 feet in the afternoon. Mostly cloudy, with a high near 42. Light west wind increasing to 5 to 9 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday Night
A chance of rain, mixing with snow after 8pm, then gradually ending. Snow level 5400 feet lowering to 4700 feet after midnight . Mostly cloudy, with a low around 33. West northwest wind 5 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday
A 30 percent chance of rain after 5pm. Partly sunny, with a high near 47.
Tuesday Night
A chance of rain and snow before 8pm, then snow. Low around 36. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Wednesday
Snow, possibly mixed with rain. Snow level 4800 feet. Cloudy, with a high near 38.
Wednesday Night
Rain and snow likely, becoming all snow after 8pm. Mostly cloudy, with a low around 25.
Thursday
Sunny, with a high near 42.
Thursday Night
Mostly clear, with a low around 27.
Friday
Sunny, with a high near 53.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ESE Cave Junction OR
 42.07°N 123.38°W (Elev. 4656 ft)
Last Update:
3:42 am PDT Apr 12, 2026
Forecast Valid:
4am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
Forecast Discussion
 
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