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

62°F

17°C

Humidity 74%
Wind Speed E 2 MPH
Barometer NA
Dewpoint 54°F (12°C)
Visibility NA
Last update 10 Apr 10:52 AM PDT
Extended Forecast for

16 Miles SE Agness OR

  • Today

    Today: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 56. West wind 3 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Showers

  • Tonight

    Tonight: Rain and possibly a thunderstorm. Low around 47. West wind around 6 mph becoming south after midnight. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °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. Snow level 5700 feet lowering to 4900 feet in the afternoon . High near 47. Southeast wind around 7 mph becoming west southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 47 °F

    Showers

  • Saturday Night

    Saturday Night: Rain. Snow level 4900 feet. Low around 43. Light and variable wind becoming northeast around 5 mph in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Rain

  • Sunday

    Sunday: Rain before 2pm, then showers and possibly a thunderstorm after 2pm. Snow level 4200 feet rising to 4700 feet in the afternoon. High near 46. West wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 46 °F

    Showers

  • Sunday Night

    Sunday Night: Rain. Snow level 4700 feet lowering to 4100 feet after midnight . Low around 42. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain

  • Monday

    Monday: Rain likely. Snow level 3800 feet rising to 4600 feet in the afternoon. Mostly cloudy, with a high near 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain Likely

  • Monday Night

    Monday Night: A chance of rain, mainly before 11pm. Snow level 4800 feet lowering to 3800 feet after midnight . Mostly cloudy, with a low around 39.

    Low: 39 °F

    Chance Rain

  • Tuesday

    Tuesday: A slight chance of rain after 11am. Snow level 3500 feet rising to 4400 feet in the afternoon. Partly sunny, with a high near 52.

    High: 52 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 56. West wind 3 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and possibly a thunderstorm. Low around 47. West wind around 6 mph becoming south after midnight. Chance of precipitation is 80%. 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. Snow level 5700 feet lowering to 4900 feet in the afternoon . High near 47. Southeast wind around 7 mph becoming west southwest in the afternoon. 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. Snow level 4900 feet. Low around 43. Light and variable wind becoming northeast around 5 mph in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain before 2pm, then showers and possibly a thunderstorm after 2pm. Snow level 4200 feet rising to 4700 feet in the afternoon. High near 46. West wind 5 to 7 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Rain. Snow level 4700 feet lowering to 4100 feet after midnight . Low around 42. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely. Snow level 3800 feet rising to 4600 feet in the afternoon. Mostly cloudy, with a high near 48. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
A chance of rain, mainly before 11pm. Snow level 4800 feet lowering to 3800 feet after midnight . Mostly cloudy, with a low around 39.
Tuesday
A slight chance of rain after 11am. Snow level 3500 feet rising to 4400 feet in the afternoon. Partly sunny, with a high near 52.
Tuesday Night
A chance of rain. Snow level 4300 feet. Mostly cloudy, with a low around 42.
Wednesday
Rain. Snow level 4400 feet. Mostly cloudy, with a high near 46.
Wednesday Night
A chance of rain and snow. Snow level 4000 feet lowering to 2600 feet after midnight . Mostly cloudy, with a low around 35.
Thursday
A slight chance of rain and snow. Snow level rising to 3800 feet in the afternoon. Mostly sunny, with a high near 53.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
16 Miles SE Agness OR
 42.4°N 123.83°W (Elev. 2582 ft)
Last Update:
11:27 am PDT Apr 10, 2026
Forecast Valid:
11am PDT Apr 10, 2026-6pm PDT Apr 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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