Sierra Weather Forecast

    • 60
    • 89

    Mostly Sunny

    • 62
    • 90

    Mostly Sunny

    • 63
    • 89

    Partly Sunny

    • 63
    • 92

    Mostly Sunny

    • 63
    • 90

    Mostly Sunny

    • 63
    • 89

    Mostly Sunny

Today 30 Sep Santa Clara Valley Including San Jose

Sunny. Highs near 90. Light Winds. Becoming northwest 5 to 10 Mph in the afternoon.

Tonight 30 Sep Santa Clara Valley Including San Jose

Mostly clear. Lows in the upper 50s. Northwest Winds 5 to 10 Mph in the evening. Becoming light.

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Sierra Temperature Statistics

September Temperature

San Jose / Reid / Hillv (1.9 miles)

  • Lowest 28 September, 2026

    51.8 °F

  • Average September

    71.2 °F

  • Highest 9 September, 2026

    98.6 °F

Climate (2021–2026)

San Jose / Reid / Hillv (1.9 miles)

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  • Average Low 2021–2026

    52 °F

  • Average 2021–2026

    63.7 °F

  • Average High 2021–2026

    72.2 °F
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