Moonstone Beach Weather Forecast

    • 54
    • 62

    Mostly Sunny

    • 54
    • 64

    Mostly Sunny

    • 56
    • 59

    Slight Chance Rain

    • 58
    • 59

    Chance Rain

    • 56
    • 59

    Rain Likely

    • 56
    • 58

    Chance Rain

Today 17 Dec San Luis Obispo County Beaches

Sunny. Highs in the upper 60s to mid 70s. Northwest Winds 15 to 25 Mph.

Tonight 17 Dec San Luis Obispo County Beaches

Mostly clear. Lows in the upper 40s to mid 50s. North Winds around 15 Mph after midnight.

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Moonstone Beach Temperature Statistics

December Temperature

Paso Robles Municipal Airport (27.3 miles)

  • Lowest 5 December, 2025

    30 °F

  • Average December

    45.3 °F

  • Highest 12 December, 2025

    73 °F

Climate (2020–Present)

Paso Robles Municipal Airport (27.3 miles)

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  • Average Low 2020–2025

    45.1 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    77.7 °F
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