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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

45°F

7°C

Humidity 87%
Wind Speed S 2 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 18 Oct 01:52 AM PDT
Extended Forecast for

6 Miles S Illinois Valley OR

  • Overnight

    Overnight: Partly cloudy, with a low around 36. Light north northeast wind.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 71. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 71 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 32. South southwest wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Increasing
    Clouds

  • Monday

    Monday: A 20 percent chance of rain before 8am. Snow level 4500 feet rising to 6700 feet in the afternoon. Mostly cloudy, with a high near 62. Calm wind.

    High: 62 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. Light and variable wind.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 36. Light north northeast wind.
Sunday
Sunny, with a high near 71. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Increasing clouds, with a low around 32. South southwest wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of rain before 8am. Snow level 4500 feet rising to 6700 feet in the afternoon. Mostly cloudy, with a high near 62. Calm wind.
Monday Night
Mostly cloudy, with a low around 31. Light and variable wind.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 36.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 34.
Thursday
Sunny, with a high near 65.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 30.
Friday
Sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 28.
Saturday
A chance of rain. Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles S Illinois Valley OR
 42.02°N 123.69°W (Elev. 2149 ft)
Last Update:
11:29 pm PDT Oct 17, 2026
Forecast Valid:
2am PDT Oct 18, 2026-6pm PDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation