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

47°F

8°C

Humidity 70%
Wind Speed NE 1 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 17 Mar 10:52 PM PDT
Extended Forecast for

3 Miles SE Illinois Valley OR

  • Tonight

    Tonight: Clear, with a low around 35. South wind 3 to 5 mph.

    Low: 35 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 35. Southwest wind around 6 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Light and variable wind.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. Light and variable wind.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain before 11am. Partly sunny, with a high near 61.

    High: 61 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 35. South wind 3 to 5 mph.
Wednesday
Sunny, with a high near 83. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 35. Southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 82. Light and variable wind.
Thursday Night
Mostly clear, with a low around 47. Light and variable wind.
Friday
Mostly sunny, with a high near 75.
Friday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 42.
Saturday
A chance of rain before 11am. Partly sunny, with a high near 61.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 36.
Monday
A slight chance of rain. Partly sunny, with a high near 65.
Monday Night
A chance of rain. Mostly cloudy, with a low around 41.
Tuesday
Rain likely. Mostly cloudy, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Illinois Valley OR
 42.08°N 123.65°W (Elev. 1644 ft)
Last Update:
10:40 pm PDT Mar 17, 2026
Forecast Valid:
11pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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