Old Gilroy Weather Forecast

    • 43
    • 74

    Becoming Sunny

    • 41
    • 70

    Partly Sunny

    • 41
    • 71

    Mostly Sunny

    • 43
    • 72

    Sunny

    • 44
    • 75

    Sunny

    • 46
    • 76

    Mostly Sunny

Today 31 Jan Santa Clara Valley Including San Jose

Mostly cloudy in the morning then becoming partly cloudy. Highs in the lower 70s. East Winds around 5 Mph becoming southwest in the afternoon.

Tonight 31 Jan Santa Clara Valley Including San Jose

Partly cloudy. Lows in the mid 40s. North Winds around 5 Mph in the evening. Becoming light.

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Old Gilroy Temperature Statistics

January Temperature

South County Airport of Santa Clara County (6.8 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    50.2 °F

  • Highest 16 January, 2026

    71.6 °F

Climate (2021–Present)

South County Airport of Santa Clara County (6.8 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    72.8 °F
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