The Arboretum Weather Forecast

    • 45
    • 67

    Increasing Clouds

    • 55
    • 69

    Mostly Cloudy

    • 53
    • 67

    Rain Likely

    • 54
    • 63

    Rain

    • 53
    • 64

    Rain Likely

    • 50
    • 63

    Rain Likely

Today 29 Dec Los Angeles County San Gabriel Valley

Sunny. Highs in the mid 60s to around 70. Northeast Winds 15 to 25 Mph.

Tonight 29 Dec Los Angeles County San Gabriel Valley

Partly cloudy in the evening then mostly cloudy. Lows in the mid 40s to around 50. Northeast Winds 15 to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

The Arboretum Temperature Statistics

December Temperature

El Monte (4.3 miles)

  • Lowest 27 December, 2025

    44.6 °F

  • Average December

    65.8 °F

  • Highest 9 December, 2025

    84.2 °F

Climate (2020–Present)

El Monte (4.3 miles)

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  • Average Low 2020–2025

    59.4 °F

  • Average 2020–2025

    70.2 °F

  • Average High 2020–2025

    76.9 °F
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