Pearson Park Weather Forecast

    • 70
    • 90

    Increasing Clouds

    • 68
    • 89

    Increasing Clouds

    • 66
    • 86

    Partly Sunny

    • 65
    • 84

    Mostly Sunny

    • 64
    • 82

    Mostly Sunny

    • 65
    • 84

    Mostly Sunny

    • 67
    • 88

    Mostly Sunny

Today 11 Sep Orange County Inland

Mostly sunny. Highs 86 to 90 towards the coast to 91 to 94 farther inland. Areas of Winds south to 10 Mph.

Tonight 11 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Lows 64 to 70. Areas of Winds south 10 Mph this evening becoming light.

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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

    78.7 °F

  • Highest 9 September, 2026

    108 °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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