Pioneer Park Weather Forecast

    • 62
    • 82

    Increasing Clouds

    • 62
    • 76

    Rain Showers

    • 57
    • 70

    Rain Showers

    • 57
    • 73

    Mostly Sunny

    • 61
    • 80

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

Today 20 Oct Orange County Inland

Partly cloudy. Highs 80 to 83.

Tonight 20 Oct Orange County Inland

Patchy fog this evening. Partly cloudy. Lows 57 to 62. Areas of Winds south to 10 Mph this evening becoming light.

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Pioneer Park Temperature Statistics

October Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 13 October, 2026

    53.7 °F

  • Average October

    78.6 °F

  • Highest 3 October, 2026

    105.7 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    57.3 °F

  • Average 2021–2026

    66.8 °F

  • Average High 2021–2026

    77 °F
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