San Martin Weather Forecast

    • 55
    • 85

    Mostly Sunny

    • 54
    • 84

    Partly Sunny

    • 51
    • 73

    Mostly Cloudy

    • 51
    • 77

    Partly Sunny

    • 54
    • 77

    Mostly Cloudy

    • 51
    • 71

    Chance Rain

Today 20 Oct Santa Clara Valley Including San Jose

Sunny. Highs in the lower 80s. Northwest Winds 5 to 10 Mph.

Tonight 20 Oct Santa Clara Valley Including San Jose

Mostly clear. Lows in the mid 50s. Northwest Winds around 5 Mph in the evening. Becoming light.

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San Martin Temperature Statistics

October Temperature

South County Airport of Santa Clara County (0.6 miles)

  • Lowest 12 October, 2025

    46.4 °F

  • Average October

    61.7 °F

  • Highest 7 October, 2025

    89.6 °F

Climate (2020–Present)

South County Airport of Santa Clara County (0.6 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    58.3 °F

  • Average High 2020–2025

    72.9 °F
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