Tustin Weather Forecast

    • 64
    • 81

    Increasing Clouds

    • 61
    • 78

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

    • 64
    • 90

    Partly Sunny

    • 64
    • 89

    Mostly Sunny

    • 62
    • 81

    Mostly Sunny

    • 64
    • 87

    Mostly Sunny

Today 19 Sep Orange County Inland

Mostly cloudy in the morning. Becoming mostly sunny. Highs 75 to 80. Light Winds.

Tonight 19 Sep Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Lows 55 to 62. Light Winds.

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  • Temperature Real-Time

Tustin Temperature Statistics

September Temperature

Santa Ana, John Wayne Airport-Orange County Airport (5 miles)

  • Lowest 11 September, 2019

    66 °F
  • Average September

    75.3 °F
  • Highest 4 September, 2019

    93 °F

Climate (2010–Present)

Santa Ana, John Wayne Airport-Orange County Airport (5 miles)

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  • Average Low 2010–Present

    58.5 °F
  • Average 2010–Present

    64.8 °F
  • Average High 2010–Present

    73.1 °F
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