Downtown San Jose Weather Forecast

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    • 63

    Increasing Clouds

    • 53
    • 63

    Rain

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    • 63

    Rain

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    • 60

    Rain

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    • 58

    Rain Likely

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    • 58

    Rain

Today 18 Dec Santa Clara Valley Including San Jose

Mostly cloudy in the morning then becoming partly cloudy. Areas of fog in the morning. Highs in the mid 60s. Light Winds. Becoming northwest around 5 Mph in the afternoon.

Tonight 18 Dec Santa Clara Valley Including San Jose

Mostly cloudy. Patchy fog. Lows in the upper 40s. Light Winds.

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Downtown San Jose Temperature Statistics

December Temperature

San Jose, San Jose International Airport (2.5 miles)

  • Lowest 13 December, 2025

    37 °F

  • Average December

    48.6 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2020–Present)

San Jose, San Jose International Airport (2.5 miles)

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  • Average Low 2020–2025

    51.9 °F

  • Average 2020–2025

    61.5 °F

  • Average High 2020–2025

    72.4 °F
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