Santa Margarita Lake Weather Forecast

    • 51
    • 85

    Sunny

    • 51
    • 89

    Sunny

    • 54
    • 94

    Mostly Sunny

    • 56
    • 95

    Mostly Sunny

    • 58
    • 98

    Hot

    • 57
    • 97

    Hot

Today 26 Aug San Luis Obispo County Mountains

Sunny. A 20 percent chance of Showers and Thunderstorms in the afternoon. Highs from the upper 80s to mid 90s at low Elevations to the upper 70s to mid 80s at high Elevations. Southwest Winds around 15 Mph in the afternoon.

Tonight 26 Aug San Luis Obispo County Mountains

Mostly clear. Lows in the mid 50s to mid 60s.

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Santa Margarita Lake Temperature Statistics

August Temperature

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

  • Lowest 4 August, 2025

    48.7 °F

  • Average August

    67.2 °F

  • Highest 21 August, 2025

    95.6 °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

    72.9 °F
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