Old Gilroy Weather Forecast

    • 54
    • 93

    Sunny

    • 60
    • 95

    Sunny

    • 60
    • 97

    Hot

    • 57
    • 95

    Mostly Sunny

    • 52
    • 87

    Partly Sunny

    • 49
    • 82

    Partly Sunny

    • 50
    • 81

    Partly Sunny

Today 17 Mar Santa Clara Valley Including San Jose

Sunny. Highs in the lower 90s. Northwest Winds 5 to 10 Mph.

Tonight 17 Mar Santa Clara Valley Including San Jose

Clear. Lows in the upper 50s. Northwest Winds around 5 Mph in the evening. Becoming light.

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Old Gilroy Temperature Statistics

March Temperature

South County Airport of Santa Clara County (6.8 miles)

  • Lowest 7 March, 2026

    37.4 °F

  • Average March

    57.8 °F

  • Highest 15 March, 2026

    80.6 °F

Climate (2021–Present)

South County Airport of Santa Clara County (6.8 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    73 °F
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