Brentwood Weather Forecast

    • 42
    • 47

    Dense Fog

    • 42
    • 54

    Partly Sunny

    • 44
    • 58

    Partly Sunny

    • 45
    • 61

    Partly Sunny

    • 44
    • 61

    Partly Sunny

    • 43
    • 60

    Partly Sunny

    • 43
    • 60

    Partly Sunny

Today 7 Dec East Bay Interior Valleys

Mostly cloudy. Highs in the upper 40s. Northeast Winds around 5 Mph.

Tonight 7 Dec East Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the Evening, then widespread dense fog after midnight. Lows in the lower 40s. Light Winds.

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Brentwood Temperature Statistics

December Temperature

Livermore, Livermore Municipal Airport (17.4 miles)

  • Lowest 5 December, 2025

    36 °F

  • Average December

    45.4 °F

  • Highest 2 December, 2025

    63 °F

Climate (2020–Present)

Livermore, Livermore Municipal Airport (17.4 miles)

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  • Average Low 2020–2025

    48.8 °F

  • Average 2020–2025

    60.6 °F

  • Average High 2020–2025

    73.9 °F
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