Tustin Weather Forecast

    • 68
    • 87

    Becoming Sunny

    • 66
    • 87

    Mostly Sunny

    • 68
    • 88

    Mostly Sunny

    • 71
    • 90

    Mostly Sunny

    • 71
    • 94

    Mostly Sunny

    • 70
    • 91

    Mostly Sunny

Today 28 Jul Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 82 to 85 towards the coast to 90 farther inland. Areas of Winds south to 10 Mph.

Tonight 28 Jul Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 61 to 68. Areas of Winds southwest 10 Mph in the evening becoming light.

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Tustin Temperature Statistics

July Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 3 July, 2026

    62.7 °F

  • Average July

    73.8 °F

  • Highest 15 July, 2026

    86.6 °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 °F

  • Average High 2021–2026

    73.7 °F
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