Black Lake Weather Forecast

    • 54
    • 73

    Gradual Clearing

    • 54
    • 64

    Partly Sunny

    • 57
    • 67

    Partly Sunny

    • 60
    • 67

    Slight Chance Rain Showers

    • 62
    • 70

    Mostly Cloudy

    • 59
    • 68

    Partly Sunny

Today 5 Sep San Luis Obispo County Beaches

Cloudy in the morning then sunny. Highs from around 70 at the Beaches to the mid to upper 70s inland. West Winds around 15 Mph in the afternoon.

Tonight 5 Sep San Luis Obispo County Beaches

Partly cloudy in the evening then mostly cloudy. Lows in the mid 50s.

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Black Lake Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (12.4 miles)

  • Lowest 2 September, 2026

    53.7 °F

  • Average September

    64.8 °F

  • Highest 2 September, 2026

    76.6 °F

Climate (2021–2026)

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (12.4 miles)

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  • Average Low 2021–2026

    50.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    73.3 °F
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