San Martin Weather Forecast

    • 45
    • 71

    Decreasing Clouds

    • 42
    • 70

    Mostly Sunny

    • 44
    • 70

    Partly Sunny

    • 46
    • 69

    Mostly Cloudy

    • 44
    • 65

    Areas Fog

    • 42
    • 63

    Areas Fog

Today 18 Jan Santa Clara Valley Including San Jose

Mostly cloudy in the morning then becoming partly cloudy. Highs around 70. Light Winds. Becoming northwest around 5 Mph in the afternoon.

Tonight 18 Jan Santa Clara Valley Including San Jose

Partly cloudy. Lows in the mid 40s. Light Winds.

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San Martin Temperature Statistics

January Temperature

South County Airport of Santa Clara County (0.6 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    50.3 °F

  • Highest 16 January, 2026

    71.6 °F

Climate (2021–Present)

South County Airport of Santa Clara County (0.6 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    72.8 °F
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