Sierra Weather Forecast

    • 47
    • 66

    Chance Rain Showers

    • 44
    • 65

    Mostly Sunny

    • 46
    • 69

    Mostly Cloudy

    • 46
    • 69

    Partly Sunny

    • 47
    • 67

    Partly Sunny

    • 49
    • 66

    Partly Sunny

Today 31 Oct Santa Clara Valley Including San Jose

Mostly cloudy. Areas of fog in the morning. Highs in the mid 60s. Southeast Winds up to 5 Mph. Becoming southwest in the afternoon.

Tonight 31 Oct Santa Clara Valley Including San Jose

Mostly cloudy in the evening then becoming partly cloudy. A slight chance of Showers after midnight. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sierra Temperature Statistics

October Temperature

San Jose / Reid / Hillv (1.9 miles)

  • Lowest 28 October, 2026

    46.4 °F

  • Average October

    69.8 °F

  • Highest 3 October, 2026

    96.8 °F

Climate (2021–2026)

San Jose / Reid / Hillv (1.9 miles)

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  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    72.3 °F
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