Moonstone Beach Weather Forecast

    • 51
    • 66

    Mostly Cloudy

    • 52
    • 66

    Mostly Cloudy

    • 60
    • 68

    Mostly Cloudy

    • 60
    • 71

    Partly Sunny

    • 61
    • 71

    Mostly Sunny

    • 61
    • 73

    Mostly Sunny

Today 30 Sep San Luis Obispo County Beaches

Sunny except for patchy low Clouds and fog in the morning. Highs from the upper 60s to mid 70s at the Beaches to the upper 70s to mid 80s inland.

Tonight 30 Sep San Luis Obispo County Beaches

Low Clouds and fog developing. Lows in the mid 40s to mid 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Moonstone Beach Temperature Statistics

September Temperature

Paso Robles Municipal Airport (27.3 miles)

  • Lowest 7 September, 2026

    45.6 °F

  • Average September

    70.2 °F

  • Highest 10 September, 2026

    107.7 °F

Climate (2021–2026)

Paso Robles Municipal Airport (27.3 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    77.9 °F
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