Ralph B Clark Regional Park Weather Forecast

    • 59
    • 77

    Increasing Clouds

    • 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 20 Jun Orange County Inland

Mostly cloudy this morning. Becoming sunny. Highs 72 to 76. Areas of Winds southwest to 10 Mph.

Tonight 20 Jun Orange County Inland

Mostly clear this evening. Becoming mostly cloudy. Patchy fog overnight. Lows 53 to 60. Areas of Winds west 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

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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