San Dimas Canyon Park Weather Forecast

    • 60
    • 80

    Increasing Clouds

    • 57
    • 75

    Partly Sunny

    • 62
    • 79

    Mostly Sunny

    • 65
    • 87

    Sunny

    • 66
    • 89

    Mostly Sunny

    • 66
    • 87

    Mostly Sunny

Today 20 Sep Los Angeles County San Gabriel Valley

Low Clouds and fog mostly clearing in the afternoon. Highs in the upper 70s to mid 80s.

Tonight 20 Sep Los Angeles County San Gabriel Valley

Partly cloudy in the evening then low Clouds and fog. Lows in the lower to mid 60s.

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San Dimas Canyon Park Temperature Statistics

September Temperature

Brackett Field Airport (2.5 miles)

  • Lowest 2 September, 2026

    60.8 °F

  • Average September

    79.2 °F

  • Highest 9 September, 2026

    105.8 °F

Climate (2021–2026)

Brackett Field Airport (2.5 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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