Castro Weather Forecast

    • 51
    • 72

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

Today 16 Oct Santa Clara Valley Including San Jose

Sunny. Highs in the lower 70s. Northwest Winds 10 to 15 Mph.

Tonight 16 Oct Santa Clara Valley Including San Jose

Mostly clear. Lows in the lower 50s. Northwest Winds 5 to 15 Mph. Becoming northeast around 5 Mph after midnight.

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Castro Temperature Statistics

October Temperature

San Jose, San Jose International Airport (5.6 miles)

  • Lowest 14 October, 2025

    48.9 °F

  • Average October

    64.4 °F

  • Highest 6 October, 2025

    86 °F

Climate (2020–Present)

San Jose, San Jose International Airport (5.6 miles)

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  • Average Low 2020–2025

    51.8 °F

  • Average 2020–2025

    61.5 °F

  • Average High 2020–2025

    72.5 °F
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