San Dimas Weather Forecast

    • 53
    • 73

    Gradual Clearing

    • 54
    • 78

    Partly Sunny

    • 55
    • 79

    Mostly Sunny

    • 55
    • 78

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

Today 13 May Los Angeles County San Gabriel Valley

Cloudy this Morning, becoming partly cloudy. Highs in the mid 70s.

Tonight 13 May Los Angeles County San Gabriel Valley

Mostly clear in the Evening, becoming partly cloudy. Lows in the lower 50s.

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San Dimas Temperature Statistics

May Temperature

Brackett Field Airport (1.9 miles)

  • Lowest 6 May, 2026

    51.8 °F

  • Average May

    68.7 °F

  • Highest 11 May, 2026

    89.6 °F

Climate (2021–Present)

Brackett Field Airport (1.9 miles)

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  • Average Low 2021–2026

    56 °F

  • Average 2021–2026

    68 °F

  • Average High 2021–2026

    76 °F
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