Mountain Spring Weather Forecast

    • 61
    • 88

    Mostly Sunny

    • 59
    • 91

    Increasing Clouds

    • 56
    • 80

    Mostly Sunny

    • 54
    • 80

    Partly Sunny

    • 53
    • 74

    Mostly Sunny

    • 57
    • 80

    Sunny

    • 60
    • 86

    Sunny

Today 23 Sep Santa Clara Valley Including San Jose

Sunny. Highs in the mid 80s to lower 90s. Northwest Winds 5 to 10 Mph.

Tonight 23 Sep Santa Clara Valley Including San Jose

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 60s. Northwest Winds 5 to 10 Mph in the evening. Becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mountain Spring Temperature Statistics

September Temperature

San Jose / Reid / Hillv (4.3 miles)

  • Lowest 7 September, 2026

    53.6 °F

  • Average September

    71.7 °F

  • Highest 9 September, 2026

    98.6 °F

Climate (2021–2026)

San Jose / Reid / Hillv (4.3 miles)

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  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    63.7 °F

  • Average High 2021–2026

    72.2 °F
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