Sand Canyon Reservoir Weather Forecast

    • 53
    • 70

    Decreasing Clouds

    • 55
    • 79

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

    • 53
    • 70

    Patchy Fog

    • 53
    • 70

    Mostly Cloudy

    • 52
    • 70

    Mostly Cloudy

Today 17 Dec Orange County Coastal

Mostly cloudy this morning. Becoming partly cloudy. Areas of fog this morning. Local visibility one quarter mile or less at Times this morning. Highs 66 to 71. Light Winds becoming west 10 Mph this afternoon.

Tonight 17 Dec Orange County Coastal

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows around 53. Areas of Winds south to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sand Canyon Reservoir Temperature Statistics

December Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    59.9 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.4 °F
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