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

58°F

14°C

Humidity 86%
Wind Speed NNE 4 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 10 Apr 03:52 PM PDT
Extended Forecast for

Illinois Valley OR

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Steady temperature around 60. Light southwest wind. Chance of precipitation is 80%.

    High: 60 °F

    Showers

  • Tonight

    Tonight: Rain and possibly a thunderstorm before 4am, then rain likely. Low around 41. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Rain

  • Saturday

    Saturday: Rain and possibly a thunderstorm before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 55. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Showers

  • Saturday Night

    Saturday Night: Rain. Low around 36. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 36 °F

    Rain

  • Sunday

    Sunday: Rain before 11am, then showers and possibly a thunderstorm after 11am. Snow level 4300 feet rising to 4800 feet in the afternoon. High near 54. Light west wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Showers

  • Sunday Night

    Sunday Night: Rain likely, mainly before 11pm. Snow level 4800 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 36. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain Likely

  • Monday

    Monday: Rain likely. Snow level 3900 feet rising to 4800 feet in the afternoon. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.

    High: 56 °F

    Rain Likely

  • Monday Night

    Monday Night: A chance of rain before 11pm. Snow level 5000 feet lowering to 4000 feet after midnight . Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Steady temperature around 60. Light southwest wind. Chance of precipitation is 80%.
Tonight
Rain and possibly a thunderstorm before 4am, then rain likely. Low around 41. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain and possibly a thunderstorm before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. High near 55. Calm wind. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain. Low around 36. Calm wind. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain before 11am, then showers and possibly a thunderstorm after 11am. Snow level 4300 feet rising to 4800 feet in the afternoon. High near 54. Light west wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Rain likely, mainly before 11pm. Snow level 4800 feet lowering to 4100 feet after midnight . Mostly cloudy, with a low around 36. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely. Snow level 3900 feet rising to 4800 feet in the afternoon. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Monday Night
A chance of rain before 11pm. Snow level 5000 feet lowering to 4000 feet after midnight . Mostly cloudy, with a low around 33.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A chance of rain, mainly after 11pm. Snow level 4800 feet lowering to 4200 feet. Mostly cloudy, with a low around 36.
Wednesday
Rain likely. Mostly cloudy, with a high near 54.
Wednesday Night
A chance of rain. Snow level 4400 feet lowering to 2800 feet after midnight . Partly cloudy, with a low around 30.
Thursday
Sunny, with a high near 61.
Thursday Night
Mostly clear, with a low around 30.
Friday
A slight chance of rain. Snow level 3400 feet rising to 4900 feet in the afternoon. Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.11°N 123.69°W (Elev. 1398 ft)
Last Update:
1:36 pm PDT Apr 10, 2026
Forecast Valid:
4pm PDT Apr 10, 2026-6pm PDT Apr 17, 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