The Arboretum Weather Forecast

    • 64
    • 92

    Increasing Clouds

    • 61
    • 87

    Mostly Cloudy

    • 59
    • 82

    Patchy Fog

    • 60
    • 84

    Partly Sunny

    • 62
    • 87

    Partly Sunny

    • 63
    • 88

    Mostly Sunny

Today 11 Aug Los Angeles County San Gabriel Valley

Partly cloudy in the Morning, then sunny with a 20 percent chance of Showers and Thunderstorms in the afternoon. Highs in the mid 80s to lower 90s. Southwest Winds around 15 Mph in the afternoon.

Tonight 11 Aug Los Angeles County San Gabriel Valley

Mostly clear in the evening then partly cloudy. Lows in the lower to mid 60s.

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The Arboretum Temperature Statistics

August Temperature

El Monte (4.3 miles)

  • Lowest 4 August, 2026

    69.8 °F

  • Average August

    85.1 °F

  • Highest 1 August, 2026

    96.8 °F

Climate (2021–2026)

El Monte (4.3 miles)

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  • Average Low 2021–2026

    59.8 °F

  • Average 2021–2026

    70.6 °F

  • Average High 2021–2026

    77.2 °F
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