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

50°F

10°C

Humidity 70%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Wind Chill49°F (9°C)
Last update 12 Apr 07:52 PM PDT
Extended Forecast for

14 Miles SE Agness OR

  • Tonight

    Tonight: Rain likely, mainly after 2am. Snow level 4600 feet. Mostly cloudy, with a low around 42. West northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 2pm. Snow level 4400 feet. Mostly cloudy, with a high near 47. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 47 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before 11pm. Snow level 4600 feet lowering to 3500 feet after midnight . Mostly cloudy, with a low around 39. West northwest wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 11am. Snow level 3000 feet rising to 4100 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 49 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain. Snow level 4100 feet rising to 4700 feet after midnight. Low around 43. South southwest wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Rain

  • Wednesday

    Wednesday: Rain. Snow level 4900 feet lowering to 4000 feet in the afternoon . High near 45. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 45 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely before 8pm, then snow likely. Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Thursday

    Thursday: A chance of snow before 11am, then a chance of rain. Snow level rising to 3300 feet in the afternoon. Mostly sunny, with a high near 49.

    High: 49 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain likely, mainly after 2am. Snow level 4600 feet. Mostly cloudy, with a low around 42. West northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%.
Monday
Rain likely, mainly before 2pm. Snow level 4400 feet. Mostly cloudy, with a high near 47. Calm wind becoming west northwest around 6 mph in the afternoon. Chance of precipitation is 70%.
Monday Night
A 30 percent chance of rain before 11pm. Snow level 4600 feet lowering to 3500 feet after midnight . Mostly cloudy, with a low around 39. West northwest wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of rain after 11am. Snow level 3000 feet rising to 4100 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 5 to 10 mph in the afternoon.
Tuesday Night
Rain. Snow level 4100 feet rising to 4700 feet after midnight. Low around 43. South southwest wind around 11 mph, with gusts as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. Snow level 4900 feet lowering to 4000 feet in the afternoon . High near 45. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
Rain likely before 8pm, then snow likely. Mostly cloudy, with a low around 34. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
A chance of snow before 11am, then a chance of rain. Snow level rising to 3300 feet in the afternoon. Mostly sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 35.
Friday
Sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 46.
Sunday
Rain likely. Snow level 5700 feet lowering to 5100 feet in the afternoon . Mostly cloudy, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles SE Agness OR
 42.42°N 123.87°W (Elev. 2461 ft)
Last Update:
4:56 pm PDT Apr 12, 2026
Forecast Valid:
8pm PDT Apr 12, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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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