Guadalupe Park Weather Forecast

    • 66
    • 89

    Mostly Sunny

    • 68
    • 94

    Mostly Sunny

    • 68
    • 88

    Rain Showers Likely

    • 68
    • 85

    Rain Showers Likely

    • 67
    • 86

    Slight Chance Thunderstorms

    • 66
    • 88

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

Today 15 Sep Orange County Inland

Partly cloudy with patchy fog this morning. Becoming sunny. Highs 80 to 84 towards the coast to 90 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 15 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Patchy fog overnight. Lows 64 to 67. Light Winds.

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Guadalupe Park Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (3.7 miles)

  • Lowest 11 September, 2025

    64.9 °F

  • Average September

    74.7 °F

  • Highest 2 September, 2025

    97 °F

Climate (2020–Present)

Fullerton, Fullerton Municipal Airport (3.7 miles)

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  • Average Low 2020–2025

    56.7 °F

  • Average 2020–2025

    66.1 °F

  • Average High 2020–2025

    76.7 °F
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