Sand Canyon Reservoir Weather Forecast

    • 67
    • 83

    Rain Showers Likely

    • 65
    • 80

    Slight Chance Thunderstorms

    • 64
    • 81

    Partly Sunny

    • 66
    • 84

    Partly Sunny

    • 67
    • 86

    Partly Sunny

    • 66
    • 85

    Mostly Sunny

Today 18 Sep Orange County Coastal

Mostly cloudy in the morning. Becoming partly cloudy. Showers likely and a slight chance of Thunderstorms. Highs around 80 at the Beaches to 81 to 84 farther inland and near higher coastal Terrain. Areas of Winds south to 10 Mph. Chance of measurable precipitation 60 percent.

Tonight 18 Sep Orange County Coastal

Partly cloudy with a slight chance of Thunderstorms. A chance of Showers. Lows 66 to 69. Areas of Winds south 10 Mph in the evening becoming light. Chance of measurable precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sand Canyon Reservoir Temperature Statistics

September Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 12 September, 2025

    64.9 °F

  • Average September

    72.6 °F

  • Highest 3 September, 2025

    86 °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

    65.7 °F

  • Average High 2020–2025

    73.6 °F
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