Fountain Valley Weather Forecast

    • 51
    • 78

    Increasing Clouds

    • 52
    • 78

    Partly Sunny

    • 53
    • 76

    Partly Sunny

    • 52
    • 74

    Mostly Sunny

    • 51
    • 73

    Partly Sunny

    • 50
    • 70

    Mostly Cloudy

    • 50
    • 68

    Mostly Cloudy

Today 16 Jan Orange County Inland

Patchy fog this morning. Mostly sunny. Highs 78 to 82. Areas of Winds northwest 10 to 15 Mph. Gusts to 30 Mph. Becoming 25 Mph this afternoon.

Tonight 16 Jan Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Lows 52 to 58. Areas of Winds northeast 10 to 20 Mph with Gusts to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fountain Valley Temperature Statistics

January Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 8 January, 2026

    48 °F

  • Average January

    60.6 °F

  • Highest 14 January, 2026

    82 °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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