Fountain Valley Weather Forecast

    • 61
    • 74

    Gradual Clearing

    • 62
    • 75

    Partly Sunny

    • 63
    • 77

    Partly Sunny

    • 66
    • 77

    Partly Sunny

    • 65
    • 78

    Partly Sunny

    • 63
    • 77

    Partly Sunny

Today 21 Jun Orange County Inland

Mostly cloudy with patchy fog this morning. Becoming sunny. Highs around 75 towards the coast to 76 to 79 farther inland. Areas of Winds south to 10 Mph.

Tonight 21 Jun Orange County Inland

Mostly clear in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 54 to 61. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Fountain Valley Temperature Statistics

June Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 2 June, 2026

    62.7 °F

  • Average June

    69.3 °F

  • Highest 12 June, 2026

    82.7 °F

Climate (2021–2026)

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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