Diamond Bar Weather Forecast

    • 55
    • 81

    Sunny

    • 58
    • 91

    Sunny

    • 55
    • 85

    Partly Sunny

    • 54
    • 75

    Patchy Fog

    • 50
    • 73

    Patchy Fog

    • 49
    • 71

    Partly Sunny

Today 23 Mar Los Angeles County San Gabriel Valley

Sunny. Highs around 80.

Tonight 23 Mar Los Angeles County San Gabriel Valley

Mostly clear. Lows in the mid 50s to around 60.

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Diamond Bar Temperature Statistics

March Temperature

Brackett Field Airport (4.3 miles)

  • Lowest 3 March, 2025

    39.2 °F

  • Average March

    56.2 °F

  • Highest 19 March, 2025

    75.2 °F

Climate (2020–Present)

Brackett Field Airport (4.3 miles)

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  • Average Low 2020–2025

    55.6 °F

  • Average 2020–2025

    67.7 °F

  • Average High 2020–2025

    75.6 °F
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