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

64°F

18°C

Humidity 34%
Wind Speed N 11 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 21 Mar 05:52 PM PDT
Extended Forecast for

17 Miles SSE Agness OR

  • Tonight

    Tonight: Partly cloudy, with a low around 39. North wind 8 to 10 mph becoming east northeast after midnight.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 61. Northeast wind 7 to 10 mph.

    High: 61 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43. Northeast wind 5 to 7 mph.

    Low: 43 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 59. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.

    High: 59 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain, mainly after 11pm.  Mostly cloudy, with a low around 48. South wind 7 to 9 mph.

    Low: 48 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 11am.  Mostly cloudy, with a high near 53. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain.  Low around 45. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 45 °F

    Rain

  • Wednesday

    Wednesday: Rain likely, mainly before 11am.  Snow level 6000 feet lowering to 4900 feet in the afternoon . Mostly cloudy, with a high near 53.

    High: 53 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A chance of rain before 11pm, then a slight chance of rain and snow.  Snow level 4700 feet lowering to 3000 feet after midnight . Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 39. North wind 8 to 10 mph becoming east northeast after midnight.
Sunday
Mostly sunny, with a high near 61. Northeast wind 7 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 43. Northeast wind 5 to 7 mph.
Monday
Partly sunny, with a high near 59. Light and variable wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 48. South wind 7 to 9 mph.
Tuesday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 53. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday Night
Rain. Low around 45. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain likely, mainly before 11am. Snow level 6000 feet lowering to 4900 feet in the afternoon . Mostly cloudy, with a high near 53.
Wednesday Night
A chance of rain before 11pm, then a slight chance of rain and snow. Snow level 4700 feet lowering to 3000 feet after midnight . Mostly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 56.
Thursday Night
Partly cloudy, with a low around 40.
Friday
Mostly sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 63.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles SSE Agness OR
 42.32°N 123.96°W (Elev. 2408 ft)
4:40 pm PDT Mar 21, 2026
6pm PDT Mar 21, 2026-6pm PDT Mar 28, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database