Montclair Weather Forecast

    • 50
    • 63

    Decreasing Clouds

    • 52
    • 72

    Becoming Sunny

    • 56
    • 81

    Mostly Sunny

    • 56
    • 84

    Mostly Sunny

    • 57
    • 81

    Partly Sunny

    • 58
    • 79

    Partly Sunny

    • 58
    • 83

    Mostly Sunny

Today 27 Sep East Bay Hills

Sunny. Highs in the upper 60s. Southwest Winds around 15 Mph.

Tonight 27 Sep East Bay Hills

Partly cloudy. Lows in the upper 40s. Southwest Winds 10 to 15 Mph.

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Montclair Temperature Statistics

September Temperature

Oakland, Metro Oakland International Airport (7.5 miles)

  • Lowest 14 September, 2026

    52.6 °F

  • Average September

    66.2 °F

  • Highest 9 September, 2026

    96.7 °F

Climate (2021–2026)

Oakland, Metro Oakland International Airport (7.5 miles)

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  • Average Low 2021–2026

    51.1 °F

  • Average 2021–2026

    58.9 °F

  • Average High 2021–2026

    67.2 °F
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