South Whittier Weather Forecast

    • 69
    • 94

    Mostly Cloudy

    • 70
    • 94

    Increasing Clouds

    • 70
    • 95

    Partly Sunny

    • 70
    • 92

    Partly Sunny

    • 70
    • 92

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

    • 69
    • 92

    Mostly Sunny

Today 18 Aug Los Angeles County San Gabriel Valley

Partly cloudy in the morning then sunny. Highs 92 to 100.

Tonight 18 Aug Los Angeles County San Gabriel Valley

Partly cloudy. Lows in the mid to upper 60s.

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South Whittier Temperature Statistics

August Temperature

Fullerton, Fullerton Municipal Airport (5 miles)

  • Lowest 16 August, 2026

    66 °F

  • Average August

    79.6 °F

  • Highest 8 August, 2026

    97.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (5 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    76.8 °F
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