Fire Weather Concerns in the South-Central U.S.; Heavy Precipitation in Northern California and the Great Lakes

Strong winds and dry conditions will promote elevated to critical fire weather conditions across southeast Colorado into the southern Plains and extending into the Ozarks. An atmospheric river will bring heavy rain and a flash flood threat to northern California and heavy mountain snow in the Cascades and Northern Rockies. A clipper system will bring heavy snow to the Great Lakes. Read More >

Current conditions at

LOS ALTOS (LOAC1)

Lat: 37.35472°NLon: 122.14167°WElev: 539.0ft.

NA

38°F

3°C

Humidity 85%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 21 Feb 04:10 AM PST
Extended Forecast for

2 Miles SE Portola Valley CA

  • Overnight

    Overnight: A 20 percent chance of rain.  Mostly cloudy, with a low around 53. South wind around 5 mph.

    Low: 53 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Rain, mainly after 11am.  High near 63. South wind 6 to 9 mph, with gusts as high as 22 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 63 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before midnight.  Patchy fog before 2am, then patchy fog after 4am. Low around 54. South southwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Rain then
    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before noon.  Otherwise, mostly cloudy, with a high near 62. Calm wind.

    High: 62 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain. Mostly cloudy, with a low around 53. South wind around 5 mph.
Tuesday
Rain, mainly after 11am. High near 63. South wind 6 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain, mainly before midnight. Patchy fog before 2am, then patchy fog after 4am. Low around 54. South southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Patchy fog before noon. Otherwise, mostly cloudy, with a high near 62. Calm wind.
Wednesday Night
Partly cloudy, with a low around 50. Calm wind.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 51.
Sunday
Partly sunny, with a high near 62.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Portola Valley CA
 37.35°N 122.19°W (Elev. 1220 ft)
12:26 am PST Feb 24, 2026
5am PST Feb 24, 2026-6pm PST Mar 2, 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