Walnut Canyon Reservoir Weather Forecast

    • 64
    • 87

    Mostly Sunny

    • 63
    • 84

    Mostly Cloudy

    • 62
    • 81

    Mostly Cloudy

    • 61
    • 82

    Partly Sunny

    • 62
    • 84

    Partly Sunny

    • 63
    • 85

    Partly Sunny

Today 11 Aug Orange County Inland

Mostly sunny. Highs 82 to 85 towards the coast to 86 to 89 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 11 Aug Orange County Inland

Mostly clear in the evening. Becoming partly cloudy. Lows 61 to 68. Areas of Winds southwest 10 Mph in the evening becoming light.

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Walnut Canyon Reservoir Temperature Statistics

August Temperature

Corona Airport (9.3 miles)

  • Lowest 5 August, 2026

    60.1 °F

  • Average August

    77.7 °F

  • Highest 8 August, 2026

    99 °F

Climate (2021–2026)

Corona Airport (9.3 miles)

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  • Average Low 2021–2026

    52.3 °F

  • Average 2021–2026

    65.1 °F

  • Average High 2021–2026

    78.3 °F
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