Grant Lake Weather Forecast

    • 57
    • 83

    Sunny

    • 58
    • 87

    Sunny

    • 60
    • 88

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

    • 61
    • 86

    Sunny

Today 29 Sep Eastern Santa Clara Hills

Sunny. Highs in the upper 70s. Northwest Winds 10 to 20 Mph.

Tonight 29 Sep Eastern Santa Clara Hills

Clear. Lows in the upper 50s to lower 70s. Northwest Winds 5 to 10 Mph.

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Grant Lake Temperature Statistics

September Temperature

South County Airport of Santa Clara County (19.3 miles)

  • Lowest 7 September, 2026

    50 °F

  • Average September

    67.3 °F

  • Highest 9 September, 2026

    102.2 °F

Climate (2021–2026)

South County Airport of Santa Clara County (19.3 miles)

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  • Average Low 2021–2026

    48 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    73.1 °F
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