Santa Margarita Lake County Park Weather Forecast

    • 57
    • 95

    Chance Rain Showers

    • 56
    • 83

    Rain Showers Likely

    • 54
    • 81

    Chance Rain Showers

    • 55
    • 87

    Mostly Sunny

    • 58
    • 90

    Mostly Sunny

    • 58
    • 93

    Chance Rain Showers

    • 53
    • 88

    Slight Chance Rain Showers

Today 17 Sep San Luis Obispo County Mountains

Partly cloudy. Highs from the lower to mid 90s at low Elevations to the mid 80s to around 90 at high Elevations. Northwest Winds around 15 Mph in the afternoon.

Tonight 17 Sep San Luis Obispo County Mountains

Cloudy. A slight chance of Showers in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 50s and 60s. Southwest Winds around 15 Mph in the evening. Chance of precipitation 40 percent.

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Santa Margarita Lake County Park Temperature Statistics

September Temperature

Paso Robles Municipal Airport (26.1 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 (26.1 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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