Rancho San Joaquin Weather Forecast

    • 63
    • 76

    Becoming Sunny

    • 64
    • 77

    Mostly Sunny

    • 66
    • 81

    Partly Sunny

    • 65
    • 80

    Partly Sunny

    • 65
    • 78

    Partly Sunny

    • 64
    • 79

    Mostly Sunny

Today 17 Sep Orange County Coastal

Partly cloudy this morning. Becoming mostly sunny. Highs 72 to 76. Light Winds becoming west 10 Mph this afternoon.

Tonight 17 Sep Orange County Coastal

Mostly clear in the evening. Becoming partly cloudy. Lows 59 to 64. Areas of Winds west to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Rancho San Joaquin Temperature Statistics

September Temperature

John Wayne-Orange County Airport (1.9 miles)

  • Lowest 2 September, 2026

    65.6 °F

  • Average September

    78 °F

  • Highest 9 September, 2026

    102.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (1.9 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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