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

51°F

11°C

Humidity 83%
Wind Speed NNW 0 MPH
Barometer NA
Dewpoint 46°F (8°C)
Visibility NA
Last update 17 Mar 09:52 AM PDT
Extended Forecast for

17 Miles WNW Illinois Valley OR

  • Today

    Today: Sunny, with a high near 64. Southwest wind 5 to 8 mph.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 51. South southwest wind 6 to 8 mph.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64. South southwest wind around 9 mph.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 50. Southwest wind 7 to 11 mph becoming east southeast in the evening.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 65. East southeast wind 9 to 11 mph becoming west southwest in the afternoon.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 63.

    High: 63 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: A chance of rain after 11pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain before 8am, then a chance of rain and snow. Snow level 7200 feet lowering to 6400 feet. Partly sunny, with a high near 54.

    High: 54 °F

    Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 64. Southwest wind 5 to 8 mph.
Tonight
Mostly clear, with a low around 51. South southwest wind 6 to 8 mph.
Wednesday
Sunny, with a high near 64. South southwest wind around 9 mph.
Wednesday Night
Mostly clear, with a low around 50. Southwest wind 7 to 11 mph becoming east southeast in the evening.
Thursday
Sunny, with a high near 65. East southeast wind 9 to 11 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 50.
Friday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 63.
Friday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 45.
Saturday
A chance of rain before 8am, then a chance of rain and snow. Snow level 7200 feet lowering to 6400 feet. Partly sunny, with a high near 54.
Saturday Night
Mostly cloudy, with a low around 38. Breezy.
Sunday
A slight chance of rain and snow. Snow level 4900 feet rising to 5600 feet in the afternoon. Partly sunny, with a high near 53. Breezy.
Sunday Night
A slight chance of rain and snow. Snow level 5900 feet lowering to 5000 feet after midnight . Mostly cloudy, with a low around 38.
Monday
A chance of rain and snow. Snow level 4500 feet rising to 5200 feet in the afternoon. Mostly cloudy, with a high near 51.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
17 Miles WNW Illinois Valley OR
 42.18°N 123.98°W (Elev. 4344 ft)
Last Update:
10:41 am PDT Mar 17, 2026
Forecast Valid:
10am PDT Mar 17, 2026-6pm PDT Mar 23, 2026
 
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Additional Resources

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Chance of Precipitation