Rancho Grande Park Weather Forecast

    • 55
    • 73

    Dense Fog

    • 57
    • 76

    Becoming Sunny

    • 57
    • 79

    Chance Rain Showers

    • 58
    • 73

    Chance Rain Showers

    • 59
    • 73

    Chance Rain Showers

    • 59
    • 71

    Patchy Fog

    • 60
    • 73

    Patchy Fog

Today 15 Sep San Luis Obispo County Inland Central Coast

Areas of low Clouds and fog in the morning then sunny. Fog locally dense with visibility one quarter mile or less. Highs in the 70s to lower 80s.

Tonight 15 Sep San Luis Obispo County Inland Central Coast

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

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Rancho Grande Park Temperature Statistics

September Temperature

San Luis Obispo, San Luis Obispo County-Mc Chesney Field (7.5 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 (7.5 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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