Rivera Park Weather Forecast

    • 66
    • 85

    Gradual Clearing

    • 64
    • 83

    Partly Sunny

    • 64
    • 83

    Partly Sunny

    • 64
    • 83

    Sunny

    • 65
    • 84

    Sunny

    • 65
    • 86

    Mostly Sunny

Today 14 Sep Los Angeles County San Gabriel Valley

Low Clouds and fog in the morning then sunny. Highs in the mid 80s to around 90.

Tonight 14 Sep Los Angeles County San Gabriel Valley

Mostly clear in the evening then Areas of low Clouds and fog. Lows in the lower to mid 60s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rivera Park Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (8.7 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    79.6 °F

  • Highest 9 September, 2026

    108.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (8.7 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    76.9 °F
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