Castle Rock State Park Weather Forecast

    • 59
    • 77

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 52
    • 71

    Mostly Cloudy

    • 50
    • 65

    Chance Rain

    • 51
    • 65

    Rain Likely

    • 47
    • 62

    Slight Chance Rain

Today 28 Mar Santa Cruz Mountains

Sunny. Highs in the 60s to upper 70s. Southwest Winds up to 5 Mph.

Tonight 28 Mar Santa Cruz Mountains

Mostly clear. Lows in the upper 40s to mid 50s. Light Winds.

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Castle Rock State Park Temperature Statistics

March Temperature

San Jose, San Jose International Airport (13.7 miles)

  • Lowest 11 March, 2026

    43.6 °F

  • Average March

    63.6 °F

  • Highest 20 March, 2026

    88.6 °F

Climate (2021–Present)

San Jose, San Jose International Airport (13.7 miles)

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  • Average Low 2021–2026

    52.1 °F

  • Average 2021–2026

    61.8 °F

  • Average High 2021–2026

    72.6 °F
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