Pioneer Park Weather Forecast

    • 51
    • 66

    Slight Chance Rain Showers

    • 47
    • 65

    Partly Sunny

    • 44
    • 63

    Mostly Sunny

    • 45
    • 66

    Mostly Sunny

    • 48
    • 69

    Mostly Sunny

    • 49
    • 72

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

Today 6 Jan Orange County Inland

Mostly cloudy this morning. Becoming partly cloudy. Highs 63 to 66. Light Winds.

Tonight 6 Jan Orange County Inland

Partly cloudy with a slight chance of Showers. Lows around 50. Light Winds. Chance of measurable precipitation 20 percent.

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  • Temperature Real-Time

Pioneer Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (6.2 miles)

  • Lowest 2 January, 2026

    54 °F

  • Average January

    59.7 °F

  • Highest 1 January, 2026

    66.9 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    56.9 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    76.4 °F
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