Bonny Doon Weather Forecast

    • 62
    • 80

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

    • 58
    • 71

    Slight Chance Rain Showers

    • 57
    • 69

    Slight Chance Rain Showers

    • 57
    • 73

    Partly Sunny

    • 59
    • 76

    Mostly Sunny

Today 16 Sep Santa Cruz Mountains

Sunny. Highs in the mid 80s to lower 90s. Light Winds.

Tonight 16 Sep Santa Cruz Mountains

Clear. Lows in the 60s to lower 70s. Light Winds.

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Bonny Doon Temperature Statistics

September Temperature

Watsonville, Watsonville Municipal Airport (21.1 miles)

  • Lowest 7 September, 2025

    54 °F

  • Average September

    63.7 °F

  • Highest 1 September, 2025

    84.9 °F

Climate (2020–Present)

Watsonville, Watsonville Municipal Airport (21.1 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    56.6 °F

  • Average High 2020–2025

    67.9 °F
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