Portola Valley Weather Forecast

    • 50
    • 78

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

    • 50
    • 78

    Mostly Sunny

    • 47
    • 73

    Partly Sunny

    • 49
    • 75

    Partly Sunny

    • 50
    • 76

    Mostly Cloudy

Today 22 Mar San Francisco Bay Shoreline

Partly cloudy in the morning then becoming sunny. Highs in the 60s to upper 70s. West Winds 5 to 10 Mph.

Tonight 22 Mar San Francisco Bay Shoreline

Mostly clear. Lows in the lower 50s. West Winds 5 to 10 Mph.

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Portola Valley Temperature Statistics

March Temperature

Palo Alto Airport (8.1 miles)

  • Lowest 5 March, 2026

    44.6 °F

  • Average March

    63 °F

  • Highest 19 March, 2026

    86 °F

Climate (2021–Present)

Palo Alto Airport (8.1 miles)

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  • Average Low 2021–2026

    51 °F

  • Average 2021–2026

    60.5 °F

  • Average High 2021–2026

    67.3 °F
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