Fountain Valley Weather Forecast

    • 64
    • 75

    Increasing Clouds

    • 64
    • 75

    Partly Sunny

    • 63
    • 75

    Partly Sunny

    • 64
    • 76

    Partly Sunny

    • 64
    • 75

    Mostly Cloudy

    • 63
    • 74

    Partly Sunny

    • 63
    • 75

    Partly Sunny

Today 16 Jul Orange County Inland

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 75 to 78 towards the coast to 79 farther inland. Areas of Winds south to 10 Mph.

Tonight 16 Jul Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows 57 to 64. Areas of Winds southwest 10 Mph this evening becoming light.

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Fountain Valley Temperature Statistics

July Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 3 July, 2025

    61 °F

  • Average July

    70.2 °F

  • Highest 8 July, 2025

    80.7 °F

Climate (2020–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.6 °F
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