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

16 Miles SE Agness OR

  • Overnight

    Overnight: A 40 percent chance of showers. Snow level 4600 feet. Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before 3pm. Snow level 4500 feet. Mostly cloudy, with a high near 47. Calm wind becoming west northwest 5 to 7 mph in the morning. Chance of precipitation is 70%.

    High: 47 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. West northwest wind around 6 mph becoming calm in the evening.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers after 11am. Snow level 2900 feet rising to 4200 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 6 to 11 mph in the afternoon.

    High: 49 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers. Snow level 4000 feet rising to 4700 feet after midnight. Low around 43. South southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Showers

  • Wednesday

    Wednesday: Showers. Snow level 5000 feet lowering to 3900 feet in the afternoon . High near 44. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    High: 44 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain showers before 8pm, then snow showers, possibly mixed with rain between 8pm and 11pm, then a chance of snow showers after 11pm. Low around 34. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 34 °F

    Rain/Snow
    then Chance
    Snow Showers

  • Thursday

    Thursday: A chance of snow before 11am, then a slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm. Snow level rising to 3300 feet in the afternoon. Mostly sunny, with a high near 48.

    High: 48 °F

    Chance
    Rain/Snow

  • Thursday Night

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

    Low: 35 °F

    Mostly Clear

Detailed Forecast

Overnight
A 40 percent chance of showers. Snow level 4600 feet. Mostly cloudy, with a low around 41. Calm wind.
Monday
Showers likely, mainly before 3pm. Snow level 4500 feet. Mostly cloudy, with a high near 47. Calm wind becoming west northwest 5 to 7 mph in the morning. Chance of precipitation is 70%.
Monday Night
Mostly cloudy, with a low around 38. West northwest wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers after 11am. Snow level 2900 feet rising to 4200 feet in the afternoon. Partly sunny, with a high near 49. Light west wind becoming west southwest 6 to 11 mph in the afternoon.
Tuesday Night
Showers. Snow level 4000 feet rising to 4700 feet after midnight. Low around 43. South southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Showers. Snow level 5000 feet lowering to 3900 feet in the afternoon . High near 44. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday Night
Rain showers before 8pm, then snow showers, possibly mixed with rain between 8pm and 11pm, then a chance of snow showers after 11pm. Low around 34. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
A chance of snow before 11am, then a slight chance of rain and snow between 11am and 2pm, then a slight chance of rain after 2pm. Snow level rising to 3300 feet in the afternoon. Mostly sunny, with a high near 48.
Thursday Night
Mostly clear, with a low around 35.
Friday
Mostly sunny, with a high near 58.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Partly sunny, with a high near 59.
Saturday Night
A chance of rain. Snow level 5400 feet. Mostly cloudy, with a low around 46.
Sunday
Rain likely. Snow level 5000 feet lowering to 4300 feet. Mostly cloudy, with a high near 52.
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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:
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

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