Walnut Valley Weather Forecast

    • 67
    • 92

    Increasing Clouds

    • 65
    • 89

    Partly Sunny

    • 63
    • 87

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 62
    • 86

    Mostly Sunny

    • 65
    • 90

    Mostly Sunny

Today 12 Sep Los Angeles County San Gabriel Valley

Sunny. Highs in the upper 80s to mid 90s.

Tonight 12 Sep Los Angeles County San Gabriel Valley

Clear in the evening then Areas of low Clouds and fog. Lows in the mid to upper 60s.

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Walnut Valley Temperature Statistics

September Temperature

El Monte (6.8 miles)

  • Lowest 2 September, 2026

    64.4 °F

  • Average September

    83.3 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

El Monte (6.8 miles)

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  • Average Low 2021–2026

    59.9 °F

  • Average 2021–2026

    70.7 °F

  • Average High 2021–2026

    77.3 °F
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