Los Nietos Weather Forecast

    • 68
    • 89

    Increasing Clouds

    • 70
    • 93

    Mostly Cloudy

    • 66
    • 87

    Patchy Fog

    • 66
    • 84

    Mostly Sunny

    • 68
    • 88

    Sunny

    • 68
    • 90

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

Today 25 Sep Los Angeles County San Gabriel Valley

Partly cloudy in the morning then sunny. Highs in the mid to upper 80s.

Tonight 25 Sep Los Angeles County San Gabriel Valley

Low Clouds and fog developing. Lows in the mid 60s.

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Los Nietos Temperature Statistics

September Temperature

El Monte (8.1 miles)

  • Lowest 2 September, 2026

    64.4 °F

  • Average September

    80.5 °F

  • Highest 9 September, 2026

    107.6 °F

Climate (2021–2026)

El Monte (8.1 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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