Santa Margarita Lake County Park Weather Forecast

    • 49
    • 89

    Increasing Clouds

    • 46
    • 87

    Mostly Cloudy

    • 44
    • 82

    Partly Sunny

    • 54
    • 84

    Sunny

    • 60
    • 95

    Sunny

    • 57
    • 95

    Mostly Sunny

    • 54
    • 88

    Mostly Sunny

Today 19 Sep San Luis Obispo County Mountains

Partly cloudy in the morning then sunny. Highs from the mid to upper 80s at low Elevations to the mid 70s to lower 80s at high Elevations.

Tonight 19 Sep San Luis Obispo County Mountains

Mostly cloudy. Lows in the upper 40s and 50s.

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Santa Margarita Lake County Park Temperature Statistics

September Temperature

Paso Robles Municipal Airport (26.1 miles)

  • Lowest 7 September, 2026

    45.6 °F

  • Average September

    70.8 °F

  • Highest 10 September, 2026

    107.7 °F

Climate (2021–2026)

Paso Robles Municipal Airport (26.1 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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