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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

36°F

2°C

Humidity 96%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 20 Mar 04:52 AM PDT
Extended Forecast for

8 Miles WNW Illinois Valley OR

  • Today

    Today: Partly sunny, with a high near 67. West northwest wind 3 to 7 mph.

    High: 67 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 49. West wind 3 to 7 mph.

    Low: 49 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A 30 percent chance of rain before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 55. North northeast wind around 7 mph.

    High: 55 °F

    Chance Rain
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36. Northeast wind 9 to 11 mph.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 57. Northeast wind 9 to 11 mph.

    High: 57 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Monday Night

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

    Low: 47 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain. Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain

Detailed Forecast

Today
Partly sunny, with a high near 67. West northwest wind 3 to 7 mph.
Tonight
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 49. West wind 3 to 7 mph.
Saturday
A 30 percent chance of rain before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 55. North northeast wind around 7 mph.
Saturday Night
Mostly clear, with a low around 36. Northeast wind 9 to 11 mph.
Sunday
Mostly sunny, with a high near 57. Northeast wind 9 to 11 mph.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 60.
Monday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 47.
Tuesday
A chance of rain. Partly sunny, with a high near 57.
Tuesday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 44.
Wednesday
A chance of rain and snow. Snow level 6500 feet lowering to 5500 feet in the afternoon . Partly sunny, with a high near 50.
Wednesday Night
A slight chance of rain and snow. Snow level 5300 feet lowering to 3700 feet after midnight . Partly cloudy, with a low around 35.
Thursday
Sunny, with a high near 57.
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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:
4:41 am PDT Mar 20, 2026
Forecast Valid:
5am PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
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Additional Resources

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Chance of Precipitation