Cupertino Weather Forecast

    • 43
    • 57

    Decreasing Clouds

    • 50
    • 64

    Mostly Cloudy

    • 55
    • 67

    Chance Rain

    • 46
    • 64

    Slight Chance Rain

    • 49
    • 63

    Chance Rain

    • 50
    • 62

    Rain Likely

Today 14 Dec Santa Clara Valley Including San Jose

Partly cloudy in the morning then becoming sunny. Areas of fog in the morning. Highs in the 60s. Northwest Winds around 5 Mph.

Tonight 14 Dec Santa Clara Valley Including San Jose

Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the mid 40s. Northwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cupertino Temperature Statistics

December Temperature

San Jose, San Jose International Airport (6.2 miles)

  • Lowest 2 December, 2025

    39.9 °F

  • Average December

    49 °F

  • Highest 3 December, 2025

    64.9 °F

Climate (2020–Present)

San Jose, San Jose International Airport (6.2 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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