Rancho Santa Margarita Weather Forecast

    • 63
    • 89

    Mostly Sunny

    • 64
    • 89

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 63
    • 85

    Mostly Sunny

    • 64
    • 87

    Mostly Sunny

    • 65
    • 91

    Mostly Sunny

Today 18 Aug Orange County Inland

Partly cloudy this morning. Becoming mostly sunny. Patchy fog this morning. Highs in the lower 80s towards the coast to this upper 80s farther inland. Light Winds.

Tonight 18 Aug Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Patchy fog overnight. Lows in the mid 60s. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rancho Santa Margarita Temperature Statistics

August Temperature

John Wayne-Orange County Airport (14.9 miles)

  • Lowest 6 August, 2022

    68 °F
  • Average August

    76.4 °F
  • Highest 9 August, 2022

    89.1 °F

Climate (2010–Present)

John Wayne-Orange County Airport (14.9 miles)

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  • Average Low 2010–Present

    59 °F
  • Average 2010–Present

    65.4 °F
  • Average High 2010–Present

    73.9 °F
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