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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

54°F

12°C

Humidity 47%
Wind Speed SSE 1 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 10 Jan 10:10 AM PST
Extended Forecast for

Portola Valley CA

  • Today

    Today: Partly sunny, with a high near 55. Northeast wind 3 to 5 mph.

    High: 55 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Light east northeast wind.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 58. North northeast wind 3 to 5 mph.

    High: 58 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 41. Light northeast wind.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 59. North wind around 6 mph.

    High: 59 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 55. Northeast wind 3 to 5 mph.
Tonight
Mostly cloudy, with a low around 40. Light east northeast wind.
Sunday
Mostly sunny, with a high near 58. North northeast wind 3 to 5 mph.
Sunday Night
Mostly clear, with a low around 41. Light northeast wind.
Monday
Sunny, with a high near 59. North wind around 6 mph.
Monday Night
Clear, with a low around 42.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 65.
Thursday Night
Mostly clear, with a low around 46.
Friday
Sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Portola Valley CA
 37.35°N 122.21°W (Elev. 1440 ft)
Last Update:
12:26 am PST Jan 10, 2026
Forecast Valid:
11am PST Jan 10, 2026-6pm PST Jan 16, 2026
 
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Additional Resources

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Chance of Precipitation