Grant Rea Park Weather Forecast

    • 64
    • 83

    Becoming Sunny

    • 67
    • 92

    Mostly Sunny

    • 68
    • 94

    Sunny

    • 69
    • 95

    Slight Chance Thunderstorms

    • 69
    • 93

    Slight Chance Thunderstorms

    • 69
    • 90

    Slight Chance Thunderstorms

    • 66
    • 88

    Partly Sunny

Today 14 Sep Los Angeles County San Gabriel Valley

Areas of low Clouds and fog in the morning then sunny. Highs in the mid to upper 80s.

Tonight 14 Sep Los Angeles County San Gabriel Valley

Clear in the evening then low Clouds and fog. Lows in the lower to mid 60s.

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Grant Rea Park Temperature Statistics

September Temperature

El Monte (5.6 miles)

  • Lowest 9 September, 2025

    66.2 °F

  • Average September

    81.9 °F

  • Highest 2 September, 2025

    100.4 °F

Climate (2020–Present)

El Monte (5.6 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.3 °F

  • Average High 2020–2025

    77.1 °F
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