Cornerstone Village Weather Forecast

    • 64
    • 78

    Becoming Sunny

    • 64
    • 79

    Mostly Sunny

    • 66
    • 82

    Partly Sunny

    • 66
    • 81

    Partly Sunny

    • 65
    • 80

    Partly Sunny

    • 65
    • 80

    Mostly Sunny

Today 17 Sep Orange County Inland

Partly cloudy in the morning. Becoming mostly sunny. Highs 81 to 84 towards the coast to 86 farther inland.

Tonight 17 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Lows 55 to 64. Areas of Winds west to 10 Mph this evening becoming light.

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Cornerstone Village Temperature Statistics

September Temperature

John Wayne-Orange County Airport (3.1 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    77.6 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (3.1 miles)

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  • Average Low 2021–2026

    59.1 °F

  • Average 2021–2026

    66.2 °F

  • Average High 2021–2026

    73.8 °F
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