Montana De Oro State Park Weather Forecast

    • 60
    • 72

    Rain Showers Likely

    • 59
    • 70

    Chance Rain Showers

    • 59
    • 71

    Patchy Fog

    • 60
    • 73

    Patchy Fog

    • 62
    • 75

    Slight Chance Rain Showers

    • 60
    • 72

    Slight Chance Rain Showers

Today 18 Sep Santa Lucia Mountains

Cloudy. A slight chance of Showers and Thunderstorms in the Morning, then a chance of Showers with a slight chance of Thunderstorms in the afternoon. Highs in the 70s to around 80. Chance of precipitation 50 percent.

Tonight 18 Sep Santa Lucia Mountains

Showers likely with a slight chance of Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 50s to lower 60s except around 70 warmer Hills. Chance of precipitation 70 percent.

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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, 2025

    50 °F

  • Average September

    65.9 °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

    73 °F
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