Old Gilroy Weather Forecast

    • 56
    • 79

    Slight Chance Thunderstorms

    • 56
    • 74

    Patchy Smoke

    • 54
    • 75

    Partly Sunny

    • 54
    • 79

    Partly Sunny

    • 53
    • 81

    Partly Sunny

    • 55
    • 81

    Partly Sunny

    • 56
    • 82

    Partly Sunny

Today 12 Aug Santa Clara Valley Including San Jose

Partly cloudy. Patchy smoke. Highs around 80. South Winds 5 to 10 Mph.

Tonight 12 Aug Santa Clara Valley Including San Jose

Partly cloudy in the evening then becoming mostly cloudy. Patchy smoke. Lows in the upper 50s. Southeast Winds 5 to 15 Mph.

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Old Gilroy Temperature Statistics

August Temperature

South County Airport of Santa Clara County (6.8 miles)

  • Lowest 1 August, 2026

    55.4 °F

  • Average August

    69 °F

  • Highest 2 August, 2026

    96.8 °F

Climate (2021–2026)

South County Airport of Santa Clara County (6.8 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    58.8 °F

  • Average High 2021–2026

    73.1 °F
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