Fountain Valley Weather Forecast

    • 49
    • 67

    Patchy Fog

    • 46
    • 65

    Partly Sunny

    • 49
    • 68

    Mostly Sunny

    • 53
    • 75

    Sunny

    • 52
    • 76

    Mostly Sunny

    • 49
    • 70

    Patchy Fog

Today 3 Dec Orange County Inland

Patchy fog this morning. Partly cloudy. Local visibility one quarter mile or less at Times this morning. Highs around 70. Light Winds.

Tonight 3 Dec Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 44 to 49. Light Winds.

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Fountain Valley Temperature Statistics

December Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 1 December, 2024

    51.1 °F

  • Average December

    61.2 °F

  • Highest 1 December, 2024

    72 °F

Climate (2019–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2019–2024

    58.9 °F

  • Average 2019–2024

    65.8 °F

  • Average High 2019–2024

    73.8 °F
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