Fountain Valley Weather Forecast

    • 66
    • 78

    Increasing Clouds

    • 65
    • 78

    Partly Sunny

    • 64
    • 77

    Mostly Cloudy

    • 66
    • 80

    Partly Sunny

    • 66
    • 78

    Partly Sunny

    • 66
    • 77

    Partly Sunny

Today 5 Jul Orange County Inland

Partly cloudy this morning. Becoming mostly sunny. Highs 81 to 84 towards the coast to 84 to 89 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 5 Jul Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Patchy dense fog overnight. Lows 59 to 66. Areas of Winds southwest 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fountain Valley Temperature Statistics

July Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 3 July, 2026

    62.1 °F

  • Average July

    69.5 °F

  • Highest 3 July, 2026

    77 °F

Climate (2021–2026)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66 °F

  • Average High 2021–2026

    73.7 °F
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