Ralph B Clark Regional Park Weather Forecast

    • 60
    • 78

    Partly Sunny

    • 62
    • 81

    Partly Sunny

    • 63
    • 86

    Partly Sunny

    • 64
    • 84

    Partly Sunny

    • 63
    • 83

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

Today 21 Jun Orange County Inland

Mostly cloudy with patchy fog in the morning. Becoming sunny. Highs around 75 towards the coast to 76 to 79 farther inland. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 21 Jun Orange County Inland

Mostly clear in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 54 to 61. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Ralph B Clark Regional Park Temperature Statistics

June Temperature

Fullerton, Fullerton Municipal Airport (1.2 miles)

  • Lowest 1 June, 2026

    62.7 °F

  • Average June

    71.9 °F

  • Highest 12 June, 2026

    92.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (1.2 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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