Guadalupe Park Weather Forecast

    • 68
    • 91

    Partly Sunny

    • 68
    • 92

    Partly Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 92

    Mostly Sunny

Today 18 Aug Orange County Inland

Partly cloudy with patchy fog in the morning. Becoming mostly sunny. Highs 83 to 86 towards the coast to 89 to 92 farther inland. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 18 Aug Orange County Inland

Partly cloudy. Patchy fog overnight. Lows 64 to 69. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Guadalupe Park Temperature Statistics

August Temperature

Fullerton, Fullerton Municipal Airport (3.7 miles)

  • Lowest 5 August, 2026

    67.6 °F

  • Average August

    79.7 °F

  • Highest 8 August, 2026

    97.6 °F

Climate (2021–2026)

Fullerton, Fullerton Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    57.1 °F

  • Average 2021–2026

    66.5 °F

  • Average High 2021–2026

    76.8 °F
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