Arcadia County Park Weather Forecast

    • 61
    • 79

    Mostly Cloudy

    • 64
    • 84

    Mostly Sunny

    • 68
    • 92

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 91

    Mostly Sunny

    • 67
    • 90

    Partly Sunny

Today 21 Sep Los Angeles County San Gabriel Valley

Mostly cloudy. A slight chance of Showers and patchy drizzle in the morning. Highs in the mid 70s to lower 80s. Chance of precipitation 20 percent.

Tonight 21 Sep Los Angeles County San Gabriel Valley

Partly cloudy in the evening then mostly cloudy. Lows in the mid 50s to mid 60s.

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Arcadia County Park Temperature Statistics

September Temperature

El Monte (3.7 miles)

  • Lowest 2 September, 2026

    64.4 °F

  • Average September

    81.5 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

El Monte (3.7 miles)

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  • Average Low 2021–2026

    60 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    77.3 °F
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