Moonstone Beach Weather Forecast

    • 57
    • 65

    Decreasing Clouds

    • 58
    • 62

    Chance Rain Showers

    • 59
    • 63

    Chance Rain Showers

    • 59
    • 64

    Patchy Fog

    • 60
    • 65

    Patchy Fog

    • 60
    • 66

    Slight Chance Rain Showers

Today 17 Sep San Luis Obispo County Beaches

Mostly cloudy with a 20 percent chance of Showers. Highs from around 70 at the Beaches to around 80 inland. West Winds around 15 Mph in the afternoon.

Tonight 17 Sep San Luis Obispo County Beaches

Mostly cloudy with a 20 percent chance of Showers. Lows in the 50s to around 60.

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Moonstone Beach Temperature Statistics

September Temperature

Paso Robles Municipal Airport (27.3 miles)

  • Lowest 7 September, 2025

    48.9 °F

  • Average September

    69.2 °F

  • Highest 1 September, 2025

    99 °F

Climate (2020–Present)

Paso Robles Municipal Airport (27.3 miles)

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  • Average Low 2020–2025

    44.9 °F

  • Average 2020–2025

    60.5 °F

  • Average High 2020–2025

    78 °F
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