Gilroy Weather Forecast

    • 54
    • 75

    Increasing Clouds

    • 55
    • 78

    Partly Sunny

    • 56
    • 86

    Mostly Sunny

    • 56
    • 86

    Partly Sunny

    • 55
    • 83

    Partly Sunny

    • 56
    • 83

    Partly Sunny

Today 16 Sep Santa Clara Valley Including San Jose

Partly cloudy in the morning then becoming sunny. Highs in the upper 70s. Southeast Winds 5 to 10 Mph. Becoming west 5 to 15 Mph in the afternoon.

Tonight 16 Sep Santa Clara Valley Including San Jose

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 50s. Northwest Winds 5 to 15 Mph. Becoming south around 5 Mph after midnight.

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Gilroy Temperature Statistics

September Temperature

South County Airport of Santa Clara County (5 miles)

  • Lowest 7 September, 2026

    50 °F

  • Average September

    70 °F

  • Highest 9 September, 2026

    102.2 °F

Climate (2021–2026)

South County Airport of Santa Clara County (5 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    73.1 °F
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