Mission Valley Weather Forecast

    • 58
    • 74

    Increasing Clouds

    • 58
    • 76

    Partly Sunny

    • 62
    • 88

    Mostly Sunny

    • 60
    • 88

    Mostly Sunny

    • 60
    • 86

    Mostly Sunny

    • 58
    • 82

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

Today 13 Sep San Francisco Bay Shoreline

Sunny. Highs in the 70s. West Winds 10 to 20 Mph.

Tonight 13 Sep San Francisco Bay Shoreline

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 60s. West Winds 10 to 20 Mph.

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Mission Valley Temperature Statistics

September Temperature

Palo Alto Airport (11.2 miles)

  • Lowest 1 September, 2025

    57.2 °F

  • Average September

    69.9 °F

  • Highest 1 September, 2025

    80.6 °F

Climate (2020–Present)

Palo Alto Airport (11.2 miles)

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  • Average Low 2020–2025

    50.9 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    67.2 °F
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