Santa Margarita Lake Weather Forecast

    • 50
    • 82

    Mostly Sunny

    • 45
    • 78

    Mostly Sunny

    • 45
    • 67

    Partly Sunny

    • 46
    • 77

    Mostly Sunny

    • 45
    • 79

    Partly Sunny

    • 46
    • 74

    Mostly Cloudy

    • 46
    • 71

    Slight Chance Rain

Today 20 Oct San Luis Obispo County Mountains

Sunny. Fog in the morning. Fog locally dense with visibility one quarter mile or less. Highs from around 80 at low Elevations to the lower to mid 70s at high Elevations.

Tonight 20 Oct San Luis Obispo County Mountains

Mostly clear. Lows in the lower to mid 50s.

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Santa Margarita Lake Temperature Statistics

October Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (11.2 miles)

  • Lowest 15 October, 2025

    44.1 °F

  • Average October

    61.3 °F

  • Highest 17 October, 2025

    84 °F

Climate (2020–Present)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (11.2 miles)

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  • Average Low 2020–2025

    49.9 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    72.8 °F
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