Castle Rock State Park Weather Forecast

    • 56
    • 78

    Sunny

    • 63
    • 85

    Sunny

    • 60
    • 86

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 54
    • 76

    Mostly Sunny

    • 53
    • 71

    Mostly Sunny

Today 18 May Santa Cruz Mountains

Sunny, breezy. Highs in the 70s to lower 80s. North Winds 20 to 30 Mph with Gusts to around 45 Mph decreasing to 5 to 10 Mph with Gusts to around 25 Mph in the afternoon.

Tonight 18 May Santa Cruz Mountains

Clear, breezy. Lows in the mid 50s to lower 60s. North Winds 20 to 30 Mph with Gusts to around 50 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Castle Rock State Park Temperature Statistics

May Temperature

San Jose, San Jose International Airport (13.7 miles)

  • Lowest 4 May, 2026

    48.7 °F

  • Average May

    62.8 °F

  • Highest 11 May, 2026

    83.6 °F

Climate (2021–Present)

San Jose, San Jose International Airport (13.7 miles)

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  • Average Low 2021–2026

    52.2 °F

  • Average 2021–2026

    61.9 °F

  • Average High 2021–2026

    72.7 °F
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