Diamond Bar Weather Forecast

    • 49
    • 75

    Mostly Sunny

    • 47
    • 74

    Increasing Clouds

    • 47
    • 73

    Sunny

    • 50
    • 71

    Sunny

    • 51
    • 77

    Sunny

    • 53
    • 80

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

Today 3 Mar Los Angeles County San Gabriel Valley

Low Clouds and fog in the morning then sunny. Highs in the mid to upper 70s.

Tonight 3 Mar Los Angeles County San Gabriel Valley

Mostly clear except for patchy low Clouds and fog after midnight. Lows in the upper 40s 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 1 March, 2026

    59 °F

  • Average March

    74.8 °F

  • Highest 1 March, 2026

    82.4 °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

    75.7 °F
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