Fallbrook Weather Forecast

    • 60
    • 81

    Partly Sunny

    • 62
    • 85

    Mostly Sunny

    • 63
    • 84

    Mostly Sunny

    • 66
    • 86

    Mostly Sunny

    • 64
    • 89

    Partly Sunny

    • 62
    • 83

    Mostly Sunny

Today 22 Sep San Diego County Inland Valleys

Mostly sunny. Warmer. Highs 80 to 85. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 22 Sep San Diego County Inland Valleys

Mostly clear in the evening. Becoming partly cloudy. Lows 56 to 62. Areas of Winds west to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fallbrook Temperature Statistics

September Temperature

Fallbrook Community Airpark (1.2 miles)

  • Lowest 3 September, 2026

    57.2 °F

  • Average September

    73.5 °F

  • Highest 8 September, 2026

    104 °F

Climate (2021–2026)

Fallbrook Community Airpark (1.2 miles)

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

  • Average Low 2021–2026

    53.9 °F

  • Average 2021–2026

    62.2 °F

  • Average High 2021–2026

    74.5 °F
Get WillyWeather+ to remove ads