Diamond Bar Weather Forecast

    • 54
    • 71

    Becoming Sunny

    • 56
    • 81

    Sunny

    • 57
    • 83

    Sunny

    • 59
    • 85

    Mostly Sunny

    • 58
    • 85

    Patchy Fog

    • 56
    • 77

    Patchy Fog

Today 6 Nov Los Angeles County San Gabriel Valley

Sunny. Highs in the lower to mid 70s.

Tonight 6 Nov Los Angeles County San Gabriel Valley

Clear in the evening then mostly cloudy. Lows in the mid 50s to around 60.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Bar Temperature Statistics

November Temperature

Brackett Field Airport (4.3 miles)

  • Lowest 1 November, 2025

    53.6 °F

  • Average November

    68.2 °F

  • Highest 1 November, 2025

    78.8 °F

Climate (2020–Present)

Brackett Field Airport (4.3 miles)

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  • Average Low 2020–2025

    55.4 °F

  • Average 2020–2025

    67.6 °F

  • Average High 2020–2025

    75.5 °F
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