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

38°F

3°C

Humidity 100%
Wind Speed SSE 0 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 17 Mar 02:52 AM PDT
Extended Forecast for

Illinois Valley OR

  • Overnight

    Overnight: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Calm wind.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. South wind 3 to 6 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45. Southwest wind 5 to 7 mph becoming calm in the evening.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Friday Night

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

    Low: 45 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 44. Calm wind.
Tuesday
Sunny, with a high near 78. Calm wind.
Tuesday Night
Mostly clear, with a low around 44. South wind 3 to 6 mph.
Wednesday
Sunny, with a high near 78. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Wednesday Night
Clear, with a low around 45. Southwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Mostly sunny, with a high near 74.
Friday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 45.
Saturday
A slight chance of rain before 11am. Partly sunny, with a high near 62.
Saturday Night
Mostly cloudy, with a low around 36.
Sunday
Partly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 35.
Monday
A slight chance of rain. Partly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.09°N 123.68°W (Elev. 1394 ft)
Last Update:
3:21 am PDT Mar 17, 2026
Forecast Valid:
3am 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