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

68°F

20°C

Humidity 36%
Wind Speed NE 3 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 21 Mar 12:52 PM PDT
Extended Forecast for

Illinois Valley OR

  • This Afternoon

    This Afternoon: Sunny, with a high near 66. North northeast wind 6 to 8 mph.

    High: 66 °F

    Sunny

  • Tonight

    Tonight: Widespread frost after 11pm. Otherwise, partly cloudy, with a low around 32. North northeast wind 6 to 9 mph.

    Low: 32 °F

    Frost

  • Sunday

    Sunday: Widespread frost before 11am. Otherwise, partly sunny, with a high near 67. North wind around 7 mph.

    High: 67 °F

    Frost then
    Partly Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 5am. Otherwise, mostly cloudy, with a low around 34. North northeast wind 3 to 6 mph.

    Low: 34 °F

    Mostly Cloudy
    then Areas
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.

    High: 68 °F

    Areas Frost
    then Mostly
    Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain likely. Mostly cloudy, with a low around 39.

    Low: 39 °F

    Rain Likely

  • Wednesday

    Wednesday: A chance of rain. Partly sunny, with a high near 60.

    High: 60 °F

    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 66. North northeast wind 6 to 8 mph.
Tonight
Widespread frost after 11pm. Otherwise, partly cloudy, with a low around 32. North northeast wind 6 to 9 mph.
Sunday
Widespread frost before 11am. Otherwise, partly sunny, with a high near 67. North wind around 7 mph.
Sunday Night
Areas of frost after 5am. Otherwise, mostly cloudy, with a low around 34. North northeast wind 3 to 6 mph.
Monday
Areas of frost before 8am. Otherwise, partly sunny, with a high near 68. Calm wind becoming west around 5 mph in the afternoon.
Monday Night
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 36.
Tuesday
Rain likely. Mostly cloudy, with a high near 62. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 39.
Wednesday
A chance of rain. Partly sunny, with a high near 60.
Wednesday Night
A slight chance of rain before 11pm. Snow level 5200 feet lowering to 3600 feet after midnight . Partly cloudy, with a low around 33.
Thursday
Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 31.
Friday
Sunny, with a high near 68.
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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:
10:41 am PDT Mar 21, 2026
Forecast Valid:
1pm PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
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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