Fullerton Weather Forecast

    • 55
    • 77

    Decreasing Clouds

    • 58
    • 89

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 55
    • 77

    Patchy Fog

    • 53
    • 69

    Mostly Cloudy

    • 53
    • 69

    Patchy Fog

Today 17 Apr Orange County Inland

Mostly cloudy in the morning. Becoming mostly sunny. Patchy fog in the morning. Highs 73 to 78. Light Winds.

Tonight 17 Apr Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Patchy fog overnight. Lows 50 to 55. Light Winds becoming northeast 15 Mph with Gusts to 25 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fullerton Temperature Statistics

April Temperature

Fullerton, Fullerton Municipal Airport (3.1 miles)

  • Lowest 4 April, 2021

    52 °F

  • Average April

    63.9 °F

  • Highest 1 April, 2021

    90 °F

Climate (2010–Present)

Fullerton, Fullerton Municipal Airport (3.1 miles)

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  • Average Low 2010–Present

    56.9 °F

  • Average 2010–Present

    65.4 °F

  • Average High 2010–Present

    76.6 °F
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