Big Canyon Reservoir Weather Forecast

    • 63
    • 71

    Cloudy

    • 62
    • 71

    Decreasing Clouds

    • 62
    • 72

    Mostly Cloudy

    • 61
    • 74

    Partly Sunny

    • 61
    • 71

    Mostly Cloudy

    • 61
    • 71

    Partly Sunny

    • 62
    • 72

    Partly Sunny

Today 21 Jul Orange County Coastal

Cloudy this morning. Becoming mostly sunny. Highs around 71 at the Beaches to 72 to 76 farther inland and near higher coastal Terrain. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 21 Jul Orange County Coastal

Cloudy. Patchy drizzle overnight. Lows 61 to 65. Areas of Winds southwest 10 Mph this evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Canyon Reservoir Temperature Statistics

July Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 2 July, 2025

    61.6 °F

  • Average July

    70.9 °F

  • Highest 8 July, 2025

    80.7 °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

    73.6 °F
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