Guadalupe Park Weather Forecast

    • 69
    • 88

    Rain Showers Likely

    • 68
    • 86

    Rain Showers Likely

    • 66
    • 83

    Slight Chance Thunderstorms

    • 66
    • 85

    Partly Sunny

    • 67
    • 88

    Partly Sunny

    • 69
    • 91

    Partly Sunny

    • 67
    • 90

    Mostly Sunny

Today 17 Sep Orange County Inland

Partly cloudy this morning. Becoming mostly cloudy. Highs around 82 towards the coast to 83 to 86 farther inland. Areas of Winds west to 10 Mph.

Tonight 17 Sep Orange County Inland

Mostly cloudy with a chance of Showers and a slight chance of Thunderstorms. Lows 64 to 69. Light Winds. Chance of measurable precipitation 50 percent.

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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

    74.4 °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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