Tustin Weather Forecast

    • 61
    • 75

    Increasing Clouds

    • 59
    • 75

    Mostly Cloudy

    • 61
    • 77

    Partly Sunny

    • 62
    • 78

    Partly Sunny

    • 63
    • 80

    Partly Sunny

    • 63
    • 79

    Partly Sunny

Today 30 Jun Orange County Inland

Mostly cloudy with patchy drizzle in the Morning, then partly cloudy in the afternoon. Highs 72 to 75. Light Winds becoming southwest 10 Mph in the afternoon.

Tonight 30 Jun Orange County Inland

Partly cloudy in the evening. Becoming mostly cloudy. Lows 54 to 61. Areas of Winds southwest 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tustin Temperature Statistics

June Temperature

John Wayne-Orange County Airport (5 miles)

  • Lowest 21 June, 2026

    60.7 °F

  • Average June

    69.2 °F

  • Highest 12 June, 2026

    82.7 °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 °F

  • Average High 2021–2026

    73.7 °F
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