Black Lake Weather Forecast

    • 58
    • 68

    Becoming Sunny

    • 60
    • 71

    Partly Sunny

    • 59
    • 72

    Slight Chance Thunderstorms

    • 59
    • 73

    Slight Chance Thunderstorms

    • 61
    • 69

    Mostly Cloudy

    • 59
    • 67

    Patchy Fog

Today 15 Sep San Luis Obispo County Beaches

Areas of low Clouds and fog in the morning then sunny. Fog locally dense with visibility one quarter mile or less. Highs from around 70 at the Beaches to the mid to upper 70s inland.

Tonight 15 Sep San Luis Obispo County Beaches

Clear early then low Clouds and fog. Fog locally dense with visibility one quarter mile or less. Lows in the mid 50s to around 60.

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Black Lake Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2025

    50 °F

  • Average September

    66.1 °F

  • Highest 1 September, 2025

    87.1 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    49.9 °F

  • Average 2020–2025

    60.4 °F

  • Average High 2020–2025

    72.9 °F
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