Tustin Weather Forecast

    • 73
    • 95

    Becoming Sunny

    • 76
    • 98

    Hot

    • 77
    • 102

    Patchy Fog

    • 75
    • 103

    Hot

    • 71
    • 94

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

Today 25 Aug Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 90 to 94 towards the coast to 100 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 25 Aug Orange County Inland

Mostly clear. Lows 68 to 72. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Tustin Temperature Statistics

August Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 5 August, 2026

    68.6 °F

  • Average August

    76.7 °F

  • Highest 9 August, 2026

    89.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (5 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    73.7 °F
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