October Heat Wave in California; Tropical Cyclone Possible in the Gulf

Much higher than typical October temperatures will continue across coastal southern California up through the Bay Area and Central Valley through midweek resulting in result in Major to Extreme HeatRisk. A tropical depression is likely to form over the Gulf of America during the middle part of this week with further strengthening possible as it moves northeastward later this week. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

51°F

11°C

Humidity 80%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 06 Oct 01:52 AM PDT
Extended Forecast for

Illinois Valley OR

  • Overnight

    Overnight: Clear, with a low around 43. Light south wind.

    Low: 43 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Light and variable wind.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 52. North northwest wind around 5 mph becoming calm  in the evening.

    Low: 52 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92. Light and variable wind.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 48. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 48 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 43. Light south wind.
Tuesday
Sunny, with a high near 92. Light and variable wind.
Tuesday Night
Clear, with a low around 52. North northwest wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 92. Light and variable wind.
Wednesday Night
Clear, with a low around 48. West wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 93.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 37.
Saturday
Sunny, with a high near 69.
Saturday Night
Clear, with a low around 32.
Sunday
Sunny, with a high near 70.
Sunday Night
Clear, with a low around 33.
Columbus Day
Sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.09°N 123.68°W (Elev. 1394 ft)
11:26 pm PDT Oct 5, 2026
2am PDT Oct 6, 2026-6pm PDT Oct 12, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database