Fullerton Municipal Airport Weather Forecast

    • 56
    • 74

    Increasing Clouds

    • 57
    • 74

    Partly Sunny

    • 58
    • 77

    Mostly Sunny

    • 58
    • 78

    Partly Sunny

    • 56
    • 75

    Partly Sunny

    • 55
    • 72

    Partly Sunny

Today 29 Apr Orange County Inland

Mostly sunny. Highs 72 to 75. Areas of Winds south to 10 Mph.

Tonight 29 Apr Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 50 to 55. Areas of Winds southwest 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

    67.3 °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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