Diamond Bar Weather Forecast

    • 55
    • 82

    Mostly Sunny

    • 59
    • 88

    Mostly Sunny

    • 65
    • 96

    Mostly Sunny

    • 67
    • 103

    Hot

    • 63
    • 103

    Hot

    • 65
    • 104

    Hot

Today 14 Mar Los Angeles County San Gabriel Valley

Sunny. Highs in the lower to mid 80s.

Tonight 14 Mar Los Angeles County San Gabriel Valley

Clear. Lows in the lower to mid 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Bar Temperature Statistics

March Temperature

Brackett Field Airport (4.3 miles)

  • Lowest 3 March, 2026

    48.2 °F

  • Average March

    66.2 °F

  • Highest 8 March, 2026

    84.2 °F

Climate (2021–Present)

Brackett Field Airport (4.3 miles)

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  • Average Low 2021–2026

    55.8 °F

  • Average 2021–2026

    67.8 °F

  • Average High 2021–2026

    75.8 °F
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