Charter Oak Weather Forecast

    • 66
    • 81

    Becoming Sunny

    • 68
    • 85

    Partly Sunny

    • 62
    • 82

    Mostly Cloudy

    • 60
    • 81

    Mostly Sunny

    • 63
    • 84

    Mostly Sunny

    • 64
    • 88

    Mostly Sunny

Today 18 Sep Los Angeles County San Gabriel Valley

Sunny. Highs in the upper 70s to mid 80s.

Tonight 18 Sep Los Angeles County San Gabriel Valley

Mostly clear. Lows in the lower to mid 60s.

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Charter Oak Temperature Statistics

September Temperature

Brackett Field Airport (3.7 miles)

  • Lowest 2 September, 2026

    60.8 °F

  • Average September

    80 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

Brackett Field Airport (3.7 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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