Santa Clara Weather Forecast

    • 64
    • 83

    Chance Rain Showers

    • 62
    • 81

    Chance Rain Showers

    • 61
    • 81

    Mostly Sunny

    • 62
    • 83

    Mostly Sunny

    • 64
    • 89

    Partly Sunny

    • 63
    • 83

    Chance Rain Showers

Today 18 Sep Santa Clara Valley Including San Jose

Mostly cloudy. A slight chance of Showers in the Morning, then a chance of Showers and isolated Thunderstorms in the afternoon. Highs in the lower 80s. South Winds 5 to 10 Mph.

Tonight 18 Sep Santa Clara Valley Including San Jose

Mostly cloudy. A chance of Showers and isolated Thunderstorms. Lows in the lower 60s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Santa Clara Temperature Statistics

September Temperature

San Jose, San Jose International Airport (1.2 miles)

  • Lowest 3 September, 2025

    60.1 °F

  • Average September

    68.9 °F

  • Highest 15 September, 2025

    90 °F

Climate (2020–Present)

San Jose, San Jose International Airport (1.2 miles)

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  • Average Low 2020–2025

    51.8 °F

  • Average 2020–2025

    61.6 °F

  • Average High 2020–2025

    72.6 °F
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