Portola Valley Weather Forecast

    • 57
    • 89

    Becoming Sunny

    • 59
    • 92

    Mostly Sunny

    • 56
    • 95

    Mostly Sunny

    • 55
    • 88

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

Today 7 Aug San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming sunny. Highs in the 70s to upper 80s. West Winds 5 to 15 Mph.

Tonight 7 Aug San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 60s. West Winds 5 to 15 Mph.

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Portola Valley Temperature Statistics

August Temperature

Palo Alto Airport (8.1 miles)

  • Lowest 2 August, 2026

    55.4 °F

  • Average August

    69.5 °F

  • Highest 2 August, 2026

    80.6 °F

Climate (2021–2026)

Palo Alto Airport (8.1 miles)

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  • Average Low 2021–2026

    51.2 °F

  • Average 2021–2026

    60.7 °F

  • Average High 2021–2026

    67.4 °F
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