Winter Returns Across the Northern Tier; Record Warmth for the Southwest

A large high pressure system will usher in cold air for this first day of March across the northern Plains, Great Lakes, Northeast and mid-Atlantic. Some wintry precipitation may evolve across the mid-Mississippi Valley, Ohio Valley and mid-Atlantic through Monday. Meanwhile, record warmth will spread across the Southwest, southern Plains through early 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 99%
Wind Speed NE 0 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 01 Mar 12:52 AM PST
Extended Forecast for

3 Miles SE Illinois Valley OR

  • Overnight

    Overnight: A 10 percent chance of rain after 4am.  Patchy fog.  Otherwise, partly cloudy, with a steady temperature around 42. Calm wind.

    Low: 42 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Monday

    Monday: A 20 percent chance of rain between noon and 3pm.  Patchy fog before 1pm.  Otherwise, mostly sunny, with a high near 58. Calm wind.

    High: 58 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. South southwest wind 3 to 5 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 4pm.  Partly sunny, with a high near 56. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 56 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly between 10pm and 4am, then showers and possibly a thunderstorm after 4am.  Low around 38. South southwest wind around 6 mph.  Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 38 °F

    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 7am, then rain, mainly after 7am.  Snow level 4300 feet. High near 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain likely, mainly before 10pm.  Areas of fog after 10pm. Snow level 3800 feet.  Otherwise, mostly cloudy, with a low around 33. Chance of precipitation is 70%.

    Low: 33 °F

    Rain Likely
    and Areas Fog
    then Chance
    Rain and
    Areas Fog

  • Thursday

    Thursday: A slight chance of rain before 10am.  Areas of fog before 10am. Snow level 3200 feet rising to 4200 feet in the afternoon.  Otherwise, partly sunny, with a high near 51.

    High: 51 °F

    Slight Chance
    Rain and
    Areas Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: A slight chance of rain.  Snow level 4600 feet. Partly cloudy, with a low around 34.

    Low: 34 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
A 10 percent chance of rain after 4am. Patchy fog. Otherwise, partly cloudy, with a steady temperature around 42. Calm wind.
Monday
A 20 percent chance of rain between noon and 3pm. Patchy fog before 1pm. Otherwise, mostly sunny, with a high near 58. Calm wind.
Monday Night
Partly cloudy, with a low around 38. South southwest wind 3 to 5 mph.
Tuesday
A 30 percent chance of rain, mainly after 4pm. Partly sunny, with a high near 56. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Tuesday Night
Rain, mainly between 10pm and 4am, then showers and possibly a thunderstorm after 4am. Low around 38. South southwest wind around 6 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and possibly a thunderstorm before 7am, then rain, mainly after 7am. Snow level 4300 feet. High near 47. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Rain likely, mainly before 10pm. Areas of fog after 10pm. Snow level 3800 feet. Otherwise, mostly cloudy, with a low around 33. Chance of precipitation is 70%.
Thursday
A slight chance of rain before 10am. Areas of fog before 10am. Snow level 3200 feet rising to 4200 feet in the afternoon. Otherwise, partly sunny, with a high near 51.
Thursday Night
A slight chance of rain. Snow level 4600 feet. Partly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Partly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Illinois Valley OR
 42.08°N 123.65°W (Elev. 1644 ft)
2:36 am PST Mar 2, 2026
2am PST Mar 2, 2026-6pm PDT Mar 8, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database