Willow Park Weather Forecast

    • 66
    • 83

    Becoming Sunny

    • 64
    • 81

    Partly Sunny

    • 64
    • 80

    Mostly Sunny

    • 64
    • 81

    Mostly Sunny

    • 65
    • 84

    Mostly Sunny

    • 66
    • 85

    Mostly Sunny

Today 14 Sep Orange County Inland

Partly cloudy in the morning. Becoming sunny. Highs around 81 towards the coast to 85 farther inland. Areas of Winds south 10 Mph.

Tonight 14 Sep Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Lows 57 to 65. Areas of Winds south 10 Mph in the evening becoming light.

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Willow Park Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (4.3 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    79.7 °F

  • Highest 9 September, 2026

    108.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (4.3 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.6 °F

  • Average High 2021–2026

    76.9 °F
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