Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

Current conditions at

LOS ALTOS (LOAC1)

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

NA

55°F

13°C

Humidity 76%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 24 May 11:10 PM PDT
Extended Forecast for

2 Miles NNE Portola Valley CA

  • Tonight

    Tonight: Partly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: A slight chance of drizzle between 8am and 11am.  Mostly sunny, with a high near 69. Light southwest wind becoming west southwest 5 to 10 mph in the afternoon.

    High: 69 °F

    Slight Chance
    Drizzle then
    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of drizzle after 2am.  Mostly cloudy, with a low around 50. West wind 5 to 9 mph.

    Low: 50 °F

    Mostly Cloudy
    then Slight
    Chance
    Drizzle

  • Tuesday

    Tuesday: A slight chance of drizzle before 11am.  Mostly cloudy, then gradually becoming sunny, with a high near 66. West northwest wind 8 to 14 mph, with gusts as high as 24 mph.

    High: 66 °F

    Slight Chance
    Drizzle then
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. West northwest wind 11 to 16 mph becoming light west  after midnight. Winds could gust as high as 30 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 48. Calm wind.
Memorial Day
A slight chance of drizzle between 8am and 11am. Mostly sunny, with a high near 69. Light southwest wind becoming west southwest 5 to 10 mph in the afternoon.
Monday Night
A slight chance of drizzle after 2am. Mostly cloudy, with a low around 50. West wind 5 to 9 mph.
Tuesday
A slight chance of drizzle before 11am. Mostly cloudy, then gradually becoming sunny, with a high near 66. West northwest wind 8 to 14 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly clear, with a low around 47. West northwest wind 11 to 16 mph becoming light west after midnight. Winds could gust as high as 30 mph.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Mostly sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 50.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Clear, with a low around 48.
Sunday
Sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Portola Valley CA
 37.4°N 122.2°W (Elev. 397 ft)
7:27 pm PDT May 24, 2026
11pm PDT May 24, 2026-6pm PDT May 31, 2026
 
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Additional Resources

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