San Martin Weather Forecast

    • 41
    • 63

    Becoming Sunny

    • 44
    • 65

    Mostly Sunny

    • 46
    • 67

    Mostly Sunny

    • 45
    • 68

    Partly Sunny

    • 44
    • 69

    Partly Sunny

    • 46
    • 70

    Partly Sunny

Today 4 Dec Santa Clara Valley Including San Jose

Partly cloudy in the morning then becoming sunny. Highs in the lower 60s. Northwest Winds around 5 Mph.

Tonight 4 Dec Santa Clara Valley Including San Jose

Mostly clear. Lows in the lower 40s. North Winds around 5 Mph.

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San Martin Temperature Statistics

December Temperature

South County Airport of Santa Clara County (0.6 miles)

  • Lowest 1 December, 2025

    39.2 °F

  • Average December

    47.1 °F

  • Highest 1 December, 2025

    55.4 °F

Climate (2020–Present)

South County Airport of Santa Clara County (0.6 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    72.8 °F
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