Los Nietos Park Weather Forecast

    • 70
    • 90

    Gradual Clearing

    • 69
    • 92

    Mostly Sunny

    • 69
    • 93

    Partly Sunny

    • 69
    • 91

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

Today 5 Aug Los Angeles County San Gabriel Valley

Areas of low Clouds and fog in the morning then sunny. Highs in the upper 80s to mid 90s.

Tonight 5 Aug Los Angeles County San Gabriel Valley

Mostly clear. Lows in the mid 60s to around 70.

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Los Nietos Park Temperature Statistics

August Temperature

Fullerton, Fullerton Municipal Airport (7.5 miles)

  • Lowest 1 August, 2026

    68.6 °F

  • Average August

    79.7 °F

  • Highest 1 August, 2026

    92.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    57 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    76.8 °F
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