Pearson Park Weather Forecast

    • 71
    • 92

    Decreasing Clouds

    • 68
    • 86

    Partly Sunny

    • 66
    • 81

    Mostly Sunny

    • 69
    • 87

    Sunny

    • 69
    • 89

    Mostly Sunny

    • 69
    • 88

    Mostly Sunny

Today 26 Sep Orange County Inland

Partly cloudy in the morning. Becoming mostly sunny. Highs around 90 towards the coast to 92 farther inland. Light Winds becoming west to 10 Mph in the afternoon.

Tonight 26 Sep Orange County Inland

Partly cloudy in the evening. Becoming mostly cloudy. Lows 66 to 70. Light Winds.

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Pearson Park Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (4.3 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    77.6 °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

    66.7 °F

  • Average High 2021–2026

    76.9 °F
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