Fountain Valley Weather Forecast

    • 59
    • 70

    Chance Rain Showers

    • 60
    • 73

    Sunny

    • 61
    • 79

    Sunny

    • 68
    • 88

    Sunny

    • 70
    • 91

    Sunny

    • 68
    • 88

    Sunny

Today 12 Oct Orange County Inland

Mostly cloudy with Showers likely this Morning, then partly cloudy with a chance of Showers this afternoon. Highs around 69 towards the coast to 65 to 69 farther inland. Areas of Winds west 10 Mph. Chance of measurable precipitation 70 percent.

Tonight 12 Oct Orange County Inland

Partly cloudy with a slight chance of Showers in the Evening, then mostly clear overnight. Lows 50 to 58. Light Winds. Chance of measurable precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fountain Valley Temperature Statistics

October Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 1 October, 2026

    67.6 °F

  • Average October

    81.9 °F

  • Highest 3 October, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (5 miles)

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

  • Average Low 2021–2026

    59.1 °F

  • Average 2021–2026

    66.3 °F

  • Average High 2021–2026

    73.9 °F
Get WillyWeather+ to remove ads