Big Twin Lake Weather Forecast

    • 48
    • 68

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 52
    • 67

    Partly Sunny

    • 51
    • 65

    Patchy Fog

    • 52
    • 64

    Patchy Fog

    • 52
    • 65

    Patchy Fog

Today 16 Oct San Luis Obispo County Beaches

Sunny. Highs in the mid 60s to lower 70s. North Winds around 15 Mph.

Tonight 16 Oct San Luis Obispo County Beaches

Mostly clear. Lows in the upper 40s to mid 50s. North Winds around 15 Mph.

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Big Twin Lake Temperature Statistics

October Temperature

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

  • Lowest 13 October, 2025

    45 °F

  • Average October

    61.8 °F

  • Highest 12 October, 2025

    78.1 °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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