Guadalupe Park Weather Forecast

    • 65
    • 89

    Increasing Clouds

    • 64
    • 86

    Mostly Sunny

    • 67
    • 89

    Mostly Sunny

    • 70
    • 95

    Mostly Sunny

    • 73
    • 98

    Hot

    • 74
    • 99

    Hot

Today 29 Sep Orange County Inland

Sunny. Highs 85 to 88. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 29 Sep Orange County Inland

Clear in the evening. Becoming partly cloudy. Lows 61 to 67. Areas of Winds southeast 10 Mph.

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Guadalupe Park Temperature Statistics

September Temperature

Fullerton, Fullerton Municipal Airport (3.7 miles)

  • Lowest 2 September, 2026

    63.6 °F

  • Average September

    77.6 °F

  • Highest 9 September, 2026

    108.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    57.2 °F

  • Average 2021–2026

    66.7 °F

  • Average High 2021–2026

    76.9 °F
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