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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

59°F

15°C

Humidity 63%
Wind Speed ENE 1 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 17 Mar 10:52 AM PDT
Extended Forecast for

17 Miles SSE Agness OR

  • Today

    Today: Sunny, with a high near 71. Light west southwest wind.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. Light south wind.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. South wind around 5 mph becoming light and variable.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. West southwest wind 5 to 7 mph becoming southeast after midnight.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 71. Southeast wind 6 to 9 mph becoming southwest in the afternoon.

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 68.

    High: 68 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, mainly before 11am. Partly sunny, with a high near 58.

    High: 58 °F

    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 71. Light west southwest wind.
Tonight
Mostly clear, with a low around 52. Light south wind.
Wednesday
Sunny, with a high near 70. South wind around 5 mph becoming light and variable.
Wednesday Night
Mostly clear, with a low around 52. West southwest wind 5 to 7 mph becoming southeast after midnight.
Thursday
Sunny, with a high near 71. Southeast wind 6 to 9 mph becoming southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 53.
Friday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 68.
Friday Night
A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47.
Saturday
A chance of rain, mainly before 11am. Partly sunny, with a high near 58.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
A slight chance of rain. Snow level 4600 feet rising to 5500 feet in the afternoon. Mostly sunny, with a high near 58.
Sunday Night
A slight chance of rain. Snow level 5700 feet lowering to 4800 feet after midnight . Mostly cloudy, with a low around 41.
Monday
A chance of rain. Snow level 4400 feet rising to 5100 feet in the afternoon. Mostly cloudy, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
Last Update:
10:41 am PDT Mar 17, 2026
Forecast Valid:
11am PDT Mar 17, 2026-6pm PDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation