Brentwood Weather Forecast

    • 57
    • 79

    Mostly Sunny

    • 57
    • 81

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 54
    • 74

    Partly Sunny

    • 59
    • 74

    Chance Rain

    • 55
    • 70

    Rain Likely

Today 20 Oct East Bay Interior Valleys

Sunny. Highs around 80. Northeast Winds 5 to 10 Mph.

Tonight 20 Oct East Bay Interior Valleys

Mostly clear. Lows in the mid 50s. Northeast Winds around 5 Mph.

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Brentwood Temperature Statistics

October Temperature

Livermore, Livermore Municipal Airport (17.4 miles)

  • Lowest 12 October, 2025

    44.1 °F

  • Average October

    62 °F

  • Highest 7 October, 2025

    90 °F

Climate (2020–Present)

Livermore, Livermore Municipal Airport (17.4 miles)

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  • Average Low 2020–2025

    48.7 °F

  • Average 2020–2025

    60.6 °F

  • Average High 2020–2025

    74 °F
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