Gilroy Weather Forecast

    • 46
    • 67

    Chance Rain

    • 46
    • 67

    Mostly Cloudy

    • 52
    • 62

    Rain Likely

    • 54
    • 64

    Rain Likely

    • 53
    • 62

    Rain Likely

    • 50
    • 60

    Rain Likely

Today 17 Dec Santa Clara Valley Including San Jose

Cloudy in the morning then becoming partly cloudy. Areas of fog in the morning. A chance of rain in the morning. Highs in the mid 60s. Light Winds. Becoming northwest 5 to 10 Mph in the afternoon.

Tonight 17 Dec Santa Clara Valley Including San Jose

Mostly cloudy. Patchy fog in the Evening, then Areas of fog after midnight. Lows in the upper 40s. Northwest Winds around 5 Mph in the evening. Becoming light.

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  • Temperature Forecast NOAA

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Gilroy Temperature Statistics

December Temperature

South County Airport of Santa Clara County (5 miles)

  • Lowest 4 December, 2025

    32 °F

  • Average December

    47.6 °F

  • Highest 2 December, 2025

    66.2 °F

Climate (2020–Present)

South County Airport of Santa Clara County (5 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    72.8 °F
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