Sierra Weather Forecast

    • 40
    • 63

    Mostly Sunny

    • 42
    • 63

    Mostly Sunny

    • 44
    • 67

    Mostly Sunny

    • 46
    • 68

    Mostly Sunny

    • 47
    • 70

    Mostly Sunny

    • 46
    • 70

    Mostly Sunny

Today 11 Jan Santa Clara Valley Including San Jose

Sunny. Highs in the lower 60s. Northwest Winds around 5 Mph.

Tonight 11 Jan Santa Clara Valley Including San Jose

Partly cloudy in the evening then becoming mostly clear. Lows in the lower 40s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sierra Temperature Statistics

January Temperature

San Jose / Reid / Hillv (1.9 miles)

  • Lowest 9 January, 2026

    37.4 °F

  • Average January

    55.2 °F

  • Highest 2 January, 2026

    64.4 °F

Climate (2021–Present)

San Jose / Reid / Hillv (1.9 miles)

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  • Average Low 2021–2026

    51.7 °F

  • Average 2021–2026

    63.5 °F

  • Average High 2021–2026

    72.1 °F
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