Rancho Bernardo Weather Forecast

    • 64
    • 86

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

    • 61
    • 77

    Partly Sunny

    • 59
    • 74

    Partly Sunny

    • 58
    • 74

    Partly Sunny

    • 59
    • 76

    Mostly Sunny

    • 59
    • 78

    Mostly Sunny

Today 7 Sep San Diego County Inland Valleys

Mostly sunny. Highs 88 to 93. Areas of Winds west to 10 Mph.

Tonight 7 Sep San Diego County Inland Valleys

Mostly clear. Lows 62 to 66. Light Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Bernardo Temperature Statistics

September Temperature

Ramona, Ramona Airport (8.7 miles)

  • Lowest 5 September, 2025

    57.9 °F

  • Average September

    80.8 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Ramona, Ramona Airport (8.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    51.2 °F

  • Average 2020–2025

    64.2 °F

  • Average High 2020–2025

    76.6 °F
Get WillyWeather+ to remove ads