Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

50°F

10°C

Humidity 81%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 05 Sep 07:10 AM PDT
Extended Forecast for

2 Miles NNW Portola Valley CA

  • Today

    Today: Sunny, with a high near 78. Calm wind becoming west northwest 5 to 9 mph in the afternoon.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 54. West northwest wind around 6 mph becoming calm  in the evening.

    Low: 54 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 75. Light west southwest wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 75 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 54. West wind 6 to 11 mph becoming light  after midnight. Winds could gust as high as 20 mph.

    Low: 54 °F

    Mostly Clear
    then Patchy
    Fog

  • Labor Day

    Labor Day: Patchy fog before 8am.  Otherwise, sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain after 11pm.  Partly cloudy, with a low around 61.

    Low: 61 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: A slight chance of rain.  Partly sunny, with a high near 89.

    High: 89 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 78. Calm wind becoming west northwest 5 to 9 mph in the afternoon.
Tonight
Increasing clouds, with a low around 54. West northwest wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 75. Light west southwest wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Patchy fog after 5am. Otherwise, mostly clear, with a low around 54. West wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 20 mph.
Labor Day
Patchy fog before 8am. Otherwise, sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 89.
Tuesday Night
A slight chance of rain after 11pm. Partly cloudy, with a low around 61.
Wednesday
A slight chance of rain. Partly sunny, with a high near 89.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 61.
Friday
Mostly sunny, with a high near 81.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Portola Valley CA
 37.42°N 122.23°W (Elev. 397 ft)
5:26 am PDT Sep 5, 2026
8am PDT Sep 5, 2026-6pm PDT Sep 11, 2026
 
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Additional Resources

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