Costa Mesa Weather Forecast

    • 46
    • 76

    Increasing Clouds

    • 51
    • 67

    Partly Sunny

    • 52
    • 68

    Patchy Fog

    • 49
    • 70

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 53
    • 74

    Partly Sunny

    • 53
    • 74

    Partly Sunny

Today 10 Dec Orange County Coastal

Mostly sunny. Highs 73 to 77. Areas of Winds northeast to 10 Mph becoming west this afternoon.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Costa Mesa Temperature Statistics

December Temperature

John Wayne-Orange County Airport (3.7 miles)

  • Lowest 3 December, 2023

    49.6 °F

  • Average December

    61.6 °F

  • Highest 5 December, 2023

    79.6 °F

Climate (2018–Present)

John Wayne-Orange County Airport (3.7 miles)

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  • Average Low 2018–2023

    59 °F

  • Average 2018–2023

    65.6 °F

  • Average High 2018–2023

    73.7 °F
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