Fountain Valley Weather Forecast

    • 56
    • 78

    Sunny

    • 54
    • 90

    Mostly Sunny

    • 53
    • 73

    Mostly Sunny

    • 51
    • 70

    Partly Sunny

    • 54
    • 75

    Sunny

    • 57
    • 84

    Sunny

    • 56
    • 82

    Partly Sunny

Today 7 Mar Orange County Inland

Sunny. Areas of blowing dust. Highs 76 to 81. Areas of Winds northeast 20 to 30 Mph. Gusts to 45 Mph. Becoming 40 Mph this afternoon.

Tonight 7 Mar Orange County Inland

Clear. Lows 55 to 58. Areas of Winds northeast 15 to 25 Mph. Gusts to 40 Mph. Becoming 45 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fountain Valley Temperature Statistics

March Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 3 March, 2026

    54 °F

  • Average March

    62.7 °F

  • Highest 1 March, 2026

    80.1 °F

Climate (2021–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    58.9 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    73.5 °F
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