Fountain Valley Weather Forecast

    • 57
    • 71

    Gradual Clearing

    • 57
    • 77

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

    • 55
    • 76

    Mostly Sunny

    • 55
    • 72

    Mostly Sunny

    • 53
    • 71

    Mostly Sunny

Today 16 Apr Orange County Inland

Mostly cloudy this morning. Becoming partly cloudy. Patchy fog this morning. Highs 71 to 75. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 16 Apr Orange County Inland

Mostly clear. Lows 50 to 56. Areas of Winds south 10 to 20 Mph. Gusts to 35 Mph overnight.

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Fountain Valley Temperature Statistics

April Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 4 April, 2026

    55.7 °F

  • Average April

    67.3 °F

  • Highest 4 April, 2026

    86.6 °F

Climate (2021–Present)

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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