Fountain Valley Weather Forecast

    • 59
    • 79

    Mostly Sunny

    • 59
    • 75

    Partly Sunny

    • 60
    • 74

    Mostly Cloudy

    • 60
    • 73

    Mostly Cloudy

    • 59
    • 71

    Chance Rain Showers

    • 58
    • 70

    Chance Rain Showers

Today 26 Oct Orange County Inland

Mostly sunny. Highs 78 to 82. Light Winds becoming west 10 Mph this afternoon.

Tonight 26 Oct Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 54 to 58. Areas of Winds west to 10 Mph in the evening becoming light.

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 24 October, 2026

    57.9 °F

  • Average October

    75.9 °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

    59.2 °F

  • Average 2021–2026

    66.3 °F

  • Average High 2021–2026

    73.9 °F
Get WillyWeather+ to remove ads