Diamond Bar Weather Forecast

    • 43
    • 56

    Rain

    • 39
    • 55

    Chance Rain

    • 37
    • 51

    Rain Likely

    • 40
    • 58

    Chance Rain

    • 45
    • 65

    Mostly Cloudy

    • 49
    • 67

    Chance Rain

    • 50
    • 70

    Chance Rain

Today 17 Feb Los Angeles County San Gabriel Valley

Mostly cloudy with a 20 percent chance of rain. Highs in the mid 50s to around 60. Southwest Winds around 15 Mph.

Tonight 17 Feb Los Angeles County San Gabriel Valley

Rain in the Evening, then rain with a slight chance of Thunderstorms after midnight. Lows in the lower to mid 40s. Southwest Winds 20 to 35 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Diamond Bar Temperature Statistics

February Temperature

Brackett Field Airport (4.3 miles)

  • Lowest 13 February, 2026

    46.4 °F

  • Average February

    64.6 °F

  • Highest 4 February, 2026

    84.2 °F

Climate (2021–Present)

Brackett Field Airport (4.3 miles)

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  • Average Low 2021–2026

    55.7 °F

  • Average 2021–2026

    67.8 °F

  • Average High 2021–2026

    75.7 °F
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