Rancho Grande Park Weather Forecast

    • 55
    • 72

    Decreasing Clouds

    • 54
    • 62

    Chance Rain

    • 53
    • 62

    Chance Rain Showers

    • 55
    • 62

    Rain Showers

    • 53
    • 60

    Rain Showers

    • 49
    • 60

    Rain Showers

Today 20 Dec San Luis Obispo County Inland Central Coast

Partly cloudy except for patchy low Clouds and fog in the morning. Fog locally dense with visibility one quarter mile or less. Highs around 70.

Tonight 20 Dec San Luis Obispo County Inland Central Coast

Low Clouds and fog. A 20 percent chance of rain after midnight. Lows in the lower to mid 50s.

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Rancho Grande Park Temperature Statistics

December Temperature

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

  • Lowest 4 December, 2025

    37 °F

  • Average December

    57.6 °F

  • Highest 10 December, 2025

    82 °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

    50 °F

  • Average 2020–2025

    60.3 °F

  • Average High 2020–2025

    72.8 °F
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