John Zimmerman Park Weather Forecast

    • 46
    • 84

    Increasing Clouds

    • 49
    • 83

    Partly Sunny

    • 55
    • 84

    Mostly Cloudy

    • 54
    • 79

    Partly Sunny

    • 54
    • 77

    Mostly Sunny

    • 52
    • 75

    Patchy Fog

Today 15 Jan Los Angeles County Inland Coast including Downtown Los Angeles

Sunny. Highs in the lower 80s.

Tonight 15 Jan Los Angeles County Inland Coast including Downtown Los Angeles

Mostly clear in the evening then Areas of low Clouds and fog. Lows in the upper 40s to mid 50s.

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John Zimmerman Park Temperature Statistics

January Temperature

Fullerton, Fullerton Municipal Airport (4.3 miles)

  • Lowest 9 January, 2026

    42.1 °F

  • Average January

    59.9 °F

  • Highest 11 January, 2026

    77 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (4.3 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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