Rancho Santa Margarita Weather Forecast

    • 57
    • 80

    Mostly Sunny

    • 59
    • 82

    Mostly Sunny

    • 57
    • 82

    Partly Sunny

    • 55
    • 78

    Patchy Fog

    • 54
    • 76

    Mostly Sunny

    • 54
    • 75

    Patchy Fog

Today 31 Oct Orange County Inland

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 75 to 78 towards the coast to 80 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 31 Oct Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows around 56. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Santa Margarita Temperature Statistics

October Temperature

John Wayne-Orange County Airport (14.9 miles)

  • Lowest 16 October, 2025

    54 °F

  • Average October

    66.5 °F

  • Highest 29 October, 2025

    86 °F

Climate (2020–Present)

John Wayne-Orange County Airport (14.9 miles)

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  • Average Low 2020–2025

    58.6 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.4 °F
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