Brentwood Weather Forecast

    • 41
    • 56

    Dense Fog

    • 36
    • 60

    Increasing Clouds

    • 40
    • 53

    Mostly Cloudy

    • 39
    • 58

    Partly Sunny

    • 41
    • 58

    Mostly Cloudy

    • 44
    • 57

    Slight Chance Rain

    • 42
    • 60

    Partly Sunny

Today 23 Jan East Bay Interior Valleys

Mostly cloudy late in the morning then becoming partly cloudy. Areas of fog late in the morning. Highs in the upper 50s. Light Winds. Becoming north around 5 Mph in the afternoon.

Tonight 23 Jan East Bay Interior Valleys

Partly cloudy. Patchy fog. Lows in the upper 30s. North Winds around 5 Mph. Becoming east after midnight.

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Brentwood Temperature Statistics

January Temperature

Livermore, Livermore Municipal Airport (17.4 miles)

  • Lowest 10 January, 2026

    32 °F

  • Average January

    49 °F

  • Highest 16 January, 2026

    70 °F

Climate (2021–Present)

Livermore, Livermore Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    48.9 °F

  • Average 2021–2026

    60.6 °F

  • Average High 2021–2026

    73.9 °F
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