Old Palo Alto Weather Forecast

    • 57
    • 75

    Increasing Clouds

    • 57
    • 80

    Mostly Sunny

    • 57
    • 83

    Partly Sunny

    • 58
    • 76

    Partly Sunny

    • 58
    • 79

    Partly Sunny

    • 58
    • 81

    Mostly Sunny

Today 17 Sep San Francisco Bay Shoreline

Mostly cloudy in the morning then becoming sunny. Highs in the lower to mid 70s. South Winds up to 5 Mph. Becoming west 5 to 15 Mph in the afternoon.

Tonight 17 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. West Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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Old Palo Alto Temperature Statistics

September Temperature

Palo Alto Airport (2.5 miles)

  • Lowest 6 September, 2026

    51.8 °F

  • Average September

    69.6 °F

  • Highest 9 September, 2026

    93.2 °F

Climate (2021–2026)

Palo Alto Airport (2.5 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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