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

Fire Weather Concerns for the Plains; Thunderstorms in the Southeast; Record Warmth Spreads in the Southwest

Elevated to locally critical conditions will persist across the High Plains. Showers and scattered thunderstorms are expected over parts of the Southeast and Florida Peninsula. Clipper system will bring modest snowfall and strong winds from the Northern High Plains into the Upper Midwest this weekend. Record warmth will persist across the Southwest into the southern Plains. Read More >

Current conditions at

ILLINOIS VALLEY AIRPORT (SBFO3)

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

NA

43°F

6°C

Humidity 99%
Wind Speed W 0 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 27 Feb 01:52 AM PST
Extended Forecast for

Illinois Valley OR

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 40. Calm wind.

    Low: 40 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63. Light and variable wind.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Rain likely, mainly after 4am. Patchy dense fog. Otherwise, increasing clouds, with a low around 41. Calm wind. Chance of precipitation is 60%.

    Low: 41 °F

    Patchy Fog
    then Rain
    Likely and
    Patchy Dense
    Fog

  • Saturday

    Saturday: Rain, mainly before 1pm, then showers after 1pm. High near 57. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 57 °F

    Rain

  • Saturday Night

    Saturday Night: Showers. Patchy fog. Low around 43. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Showers and
    Patchy Fog

  • Sunday

    Sunday: Showers likely, then showers and possibly a thunderstorm after 10am. Areas of fog before 1pm. High near 56. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 56 °F

    Showers and
    Areas Fog

  • Sunday Night

    Sunday Night: Showers likely, mainly before 10pm. Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: A chance of showers, mainly before 10am. Areas of fog before 11am. Otherwise, mostly sunny, with a high near 59.

    High: 59 °F

    Chance
    Showers and
    Areas Fog

  • Monday Night

    Monday Night: A slight chance of showers before 10pm. Patchy fog. Otherwise, mostly clear, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers and
    Patchy Fog
    then Areas
    Fog

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 40. Calm wind.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 63. Light and variable wind.
Friday Night
Rain likely, mainly after 4am. Patchy dense fog. Otherwise, increasing clouds, with a low around 41. Calm wind. Chance of precipitation is 60%.
Saturday
Rain, mainly before 1pm, then showers after 1pm. High near 57. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Showers. Patchy fog. Low around 43. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers likely, then showers and possibly a thunderstorm after 10am. Areas of fog before 1pm. High near 56. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely, mainly before 10pm. Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 41. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday
A chance of showers, mainly before 10am. Areas of fog before 11am. Otherwise, mostly sunny, with a high near 59.
Monday Night
A slight chance of showers before 10pm. Patchy fog. Otherwise, mostly clear, with a low around 38.
Tuesday
A chance of rain after 4pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 59.
Tuesday Night
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a low around 40.
Wednesday
Rain likely. Patchy fog. Otherwise, mostly cloudy, with a high near 53.
Wednesday Night
A chance of rain. Patchy fog. Snow level 4000 feet. Otherwise, mostly cloudy, with a low around 34.
Thursday
A slight chance of rain. Areas of fog. Snow level 3500 feet rising to 4400 feet in the afternoon. Otherwise, mostly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Illinois Valley OR
 42.09°N 123.68°W (Elev. 1394 ft)
Last Update:
2:28 am PST Feb 27, 2026
Forecast Valid:
2am PST Feb 27, 2026-6pm PST Mar 5, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation