Downtown San Jose Weather Forecast

    • 63
    • 90

    Sunny

    • 63
    • 92

    Sunny

    • 63
    • 90

    Partly Sunny

    • 63
    • 82

    Chance Rain Showers

    • 62
    • 83

    Chance Rain Showers

    • 61
    • 81

    Partly Sunny

    • 61
    • 81

    Mostly Sunny

Today 15 Sep Santa Clara Valley Including San Jose

Sunny. Highs in the upper 80s to mid 90s. West Winds 5 to 10 Mph.

Tonight 15 Sep Santa Clara Valley Including San Jose

Clear. Lows in the lower 60s. West Winds 5 to 10 Mph in the evening. Becoming light.

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Downtown San Jose Temperature Statistics

September Temperature

San Jose, San Jose International Airport (2.5 miles)

  • Lowest 3 September, 2025

    60.1 °F

  • Average September

    68.7 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

San Jose, San Jose International Airport (2.5 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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