Boulder Creek Weather Forecast

    • 58
    • 84

    Chance Rain Showers

    • 56
    • 83

    Chance Rain Showers

    • 57
    • 87

    Mostly Sunny

    • 58
    • 90

    Sunny

    • 60
    • 94

    Partly Sunny

    • 58
    • 85

    Chance Rain Showers

Today 18 Sep Santa Cruz Mountains

Mostly cloudy. A chance of Showers. Isolated Thunderstorms in the afternoon. Highs in the 70s. Southwest Winds around 5 Mph.

Tonight 18 Sep Santa Cruz Mountains

Mostly cloudy. A chance of Showers and isolated Thunderstorms. Lows in the upper 50s to mid 60s. Light Winds.

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  • Temperature Real-Time

Boulder Creek Temperature Statistics

September Temperature

San Jose, San Jose International Airport (19.3 miles)

  • Lowest 3 September, 2025

    60.1 °F

  • Average September

    68.9 °F

  • Highest 15 September, 2025

    90 °F

Climate (2020–Present)

San Jose, San Jose International Airport (19.3 miles)

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  • Average Low 2020–2025

    51.8 °F

  • Average 2020–2025

    61.6 °F

  • Average High 2020–2025

    72.6 °F
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