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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High 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. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

44°F

7°C

Humidity 79%
Wind Speed WSW 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 17 Mar 11:52 PM PDT
Extended Forecast for

8 Miles WNW Illinois Valley OR

  • Overnight

    Overnight: Clear, with a low around 53. Southwest wind around 6 mph.

    Low: 53 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 69. Southwest wind 6 to 8 mph.

    High: 69 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. Southwest wind around 7 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 68. Southwest wind 3 to 7 mph.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. West southwest wind 5 to 7 mph becoming light and variable.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, mainly before 11am. Snow level 7000 feet lowering to 5800 feet. Partly sunny, with a high near 54.

    High: 54 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 53. Southwest wind around 6 mph.
Wednesday
Sunny, with a high near 69. Southwest wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 53. Southwest wind around 7 mph.
Thursday
Sunny, with a high near 68. Southwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 51. West southwest wind 5 to 7 mph becoming light and variable.
Friday
Mostly sunny, with a high near 67.
Friday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 45.
Saturday
A chance of rain, mainly before 11am. Snow level 7000 feet lowering to 5800 feet. Partly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Mostly sunny, with a high near 57.
Sunday Night
Partly cloudy, with a low around 39.
Monday
A slight chance of rain. Snow level 5100 feet rising to 5800 feet in the afternoon. Partly sunny, with a high near 57.
Monday Night
A chance of rain and snow. Snow level 5700 feet. Mostly cloudy, with a low around 43.
Tuesday
Rain and snow likely. Snow level 5300 feet lowering to 4700 feet in the afternoon . Mostly cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles WNW Illinois Valley OR
 42.14°N 123.81°W (Elev. 3209 ft)
Last Update:
10:40 pm PDT Mar 17, 2026
Forecast Valid:
12am PDT Mar 18, 2026-6pm PDT Mar 24, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation