Willow Park Weather Forecast

    • 53
    • 79

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

    • 53
    • 70

    Mostly Cloudy

    • 53
    • 71

    Mostly Cloudy

    • 54
    • 71

    Mostly Cloudy

    • 56
    • 69

    Rain Likely

Today 18 Dec Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Local visibility one quarter mile or less at Times this morning. Warmer. Highs around 77 towards the coast to 79 to 82 farther inland. Areas of Winds northeast to 10 Mph this morning becoming light.

Tonight 18 Dec Orange County Inland

Mostly clear. Lows 52 to 56. Light Winds.

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Willow Park Temperature Statistics

December Temperature

Fullerton, Fullerton Municipal Airport (4.3 miles)

  • Lowest 5 December, 2025

    45 °F

  • Average December

    61.2 °F

  • Highest 10 December, 2025

    84.9 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (4.3 miles)

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  • Average Low 2020–2025

    56.8 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.4 °F
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