Fountain Valley Weather Forecast

    • 58
    • 77

    Partly Sunny

    • 57
    • 80

    Increasing Clouds

    • 57
    • 75

    Mostly Cloudy

    • 58
    • 74

    Mostly Cloudy

    • 56
    • 72

    Mostly Cloudy

    • 53
    • 72

    Mostly Cloudy

    • 54
    • 74

    Mostly Sunny

Today 28 Mar Orange County Inland

Patchy fog this morning. Partly cloudy. Highs 81 to 85 towards the coast to 87 farther inland. Light Winds becoming west 10 Mph this afternoon.

Tonight 28 Mar Orange County Inland

Partly cloudy. Lows 58 to 62. Areas of Winds west to 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fountain Valley Temperature Statistics

March Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 6 March, 2026

    52 °F

  • Average March

    69.1 °F

  • Highest 17 March, 2026

    95.6 °F

Climate (2021–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    65.9 °F

  • Average High 2021–2026

    73.7 °F
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