Old Gilroy Weather Forecast

    • 51
    • 88

    Partly Sunny

    • 52
    • 66

    Mostly Cloudy

    • 47
    • 64

    Partly Sunny

    • 41
    • 62

    Partly Sunny

    • 44
    • 64

    Chance Rain

    • 46
    • 61

    Rain Likely

Today 25 Mar Santa Clara Valley Including San Jose

Partly cloudy. Highs in the upper 80s. Light Winds. Becoming south 5 to 10 Mph in the afternoon.

Tonight 25 Mar Santa Clara Valley Including San Jose

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. Southeast Winds around 5 Mph.

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Old Gilroy Temperature Statistics

March Temperature

South County Airport of Santa Clara County (6.8 miles)

  • Lowest 7 March, 2025

    35.6 °F

  • Average March

    50.6 °F

  • Highest 23 March, 2025

    73.4 °F

Climate (2020–Present)

South County Airport of Santa Clara County (6.8 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    58.5 °F

  • Average High 2020–2025

    73.1 °F
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