Altamont Weather Forecast

    • 53
    • 74

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 54
    • 83

    Mostly Sunny

Today 13 Sep East Bay Hills

Sunny. Highs in the mid 70s. West Winds around 10 Mph.

Tonight 13 Sep East Bay Hills

Clear except for smoke after midnight. Lows in the lower 50s. West Winds around 10 Mph.

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Altamont Temperature Statistics

September Temperature

Livermore, Livermore Municipal Airport (8.7 miles)

  • Lowest 5 September, 2026

    50.6 °F

  • Average September

    71.3 °F

  • Highest 9 September, 2026

    104.6 °F

Climate (2021–2026)

Livermore, Livermore Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    49 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    74.1 °F
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