Fullerton Municipal Airport Weather Forecast

    • 55
    • 75

    Increasing Clouds

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 78

    Mostly Sunny

    • 56
    • 83

    Partly Sunny

    • 54
    • 80

    Mostly Sunny

    • 54
    • 75

    Mostly Sunny

Today 15 Apr Orange County Inland

Partly cloudy this morning. Becoming sunny. Highs 72 to 76. Areas of Winds south to 10 Mph.

Tonight 15 Apr Orange County Inland

Mostly clear in the evening. Becoming mostly cloudy overnight with patchy fog. Lows 51 to 55. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Fullerton Municipal Airport Temperature Statistics

April Temperature

Fullerton, Fullerton Municipal Airport (0 miles)

  • Lowest 4 April, 2026

    52.6 °F

  • Average April

    68.2 °F

  • Highest 4 April, 2026

    91.7 °F

Climate (2021–Present)

Fullerton, Fullerton Municipal Airport (0 miles)

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  • Average Low 2021–2026

    57 °F

  • Average 2021–2026

    66.4 °F

  • Average High 2021–2026

    76.8 °F
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