Old Gilroy Weather Forecast

    • 48
    • 83

    Mostly Sunny

    • 47
    • 80

    Mostly Sunny

    • 51
    • 84

    Mostly Sunny

    • 51
    • 87

    Mostly Sunny

    • 48
    • 79

    Mostly Sunny

    • 47
    • 79

    Mostly Sunny

Today 15 Jun Santa Clara Valley Including San Jose

Partly cloudy in the morning then becoming sunny. Highs in the 70s to mid 80s. Southwest Winds around 5 Mph. Becoming northwest 5 to 15 Mph in the afternoon.

Tonight 15 Jun Santa Clara Valley Including San Jose

Mostly clear. Lows in the lower 50s. Northwest Winds 5 to 15 Mph.

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Old Gilroy Temperature Statistics

June Temperature

South County Airport of Santa Clara County (6.8 miles)

  • Lowest 12 June, 2025

    48.2 °F

  • Average June

    63.2 °F

  • Highest 7 June, 2025

    84.2 °F

Climate (2020–Present)

South County Airport of Santa Clara County (6.8 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    73 °F
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