Montana De Oro State Park Weather Forecast

    • 57
    • 67

    Patchy Fog

    • 62
    • 82

    Partly Sunny

    • 61
    • 77

    Patchy Fog

    • 61
    • 77

    Partly Sunny

    • 56
    • 72

    Partly Sunny

    • 55
    • 67

    Mostly Sunny

    • 58
    • 71

    Mostly Sunny

Today 22 Sep Santa Lucia Mountains

Sunny. Highs in the mid 70s to mid 80s.

Tonight 22 Sep Santa Lucia Mountains

Mostly clear. Lows in the mid 50s to lower 60s. Northwest Winds around 15 Mph shifting to the north after midnight.

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Montana De Oro State Park Temperature Statistics

September Temperature

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

  • Lowest 7 September, 2026

    49.6 °F

  • Average September

    69.1 °F

  • Highest 9 September, 2026

    107.7 °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

    61.1 °F

  • Average High 2021–2026

    73.3 °F
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