Fountain Valley Weather Forecast

    • 52
    • 79

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 54
    • 77

    Partly Sunny

    • 53
    • 77

    Partly Sunny

    • 54
    • 73

    Partly Sunny

    • 52
    • 72

    Partly Sunny

Today 15 Jan Orange County Inland

Mostly sunny. Highs 79 to 83. Areas of Winds east 10 to 15 Mph with Gusts to 30 Mph becoming southwest this afternoon.

Tonight 15 Jan Orange County Inland

Mostly clear. Lows around 53. Light Winds.

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Fountain Valley Temperature Statistics

January Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 8 January, 2026

    48 °F

  • Average January

    60.5 °F

  • Highest 12 January, 2026

    78.1 °F

Climate (2021–Present)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    58.8 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    73.3 °F
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