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

Tracking Winter Weather and Frigid Temperatures Through This Weekend

A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

63°F

17°C

Humidity 46%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 17 Jan 11:10 AM PST
Extended Forecast for

Portola Valley CA

  • Today

    Today: Partly sunny, with a high near 66. Northeast wind around 5 mph.

    High: 66 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Light east wind.

    Low: 48 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 66. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 66. East wind around 6 mph becoming north northeast in the afternoon.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 66. Northeast wind around 5 mph.
Tonight
Mostly cloudy, with a low around 48. Light east wind.
Sunday
Mostly sunny, with a high near 66. Calm wind becoming north northeast around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 46. Calm wind.
M.L.King Day
Sunny, with a high near 66. East wind around 6 mph becoming north northeast in the afternoon.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 45.
Wednesday
Mostly sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Patchy fog. Otherwise, partly cloudy, with a low around 45.
Friday
Patchy fog. Otherwise, mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.37°N 122.22°W (Elev. 597 ft)
Last Update:
11:53 am PST Jan 17, 2026
Forecast Valid:
11am PST Jan 17, 2026-6pm PST Jan 23, 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation