Grant Lake Weather Forecast

    • 41
    • 60

    Mostly Sunny

    • 43
    • 62

    Mostly Sunny

    • 43
    • 63

    Mostly Sunny

    • 44
    • 63

    Mostly Sunny

    • 46
    • 65

    Partly Sunny

    • 46
    • 66

    Mostly Sunny

    • 46
    • 66

    Sunny

Today 5 Dec Eastern Santa Clara Hills

Sunny. Highs in the upper 50s. North Winds around 5 Mph.

Tonight 5 Dec Eastern Santa Clara Hills

Clear. Lows in the 30s to upper 40s. North Winds around 5 Mph.

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  • Temperature Real-Time

Grant Lake Temperature Statistics

December Temperature

South County Airport of Santa Clara County (19.3 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    48.8 °F

  • Highest 2 December, 2025

    66.2 °F

Climate (2020–Present)

South County Airport of Santa Clara County (19.3 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    58.4 °F

  • Average High 2020–2025

    72.8 °F
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