Walnut Canyon Reservoir Weather Forecast

    • 66
    • 90

    Partly Sunny

    • 67
    • 92

    Partly Sunny

    • 67
    • 92

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

    • 67
    • 91

    Mostly Sunny

    • 66
    • 90

    Mostly Sunny

Today 18 Aug Orange County Inland

Mostly cloudy this morning. Becoming partly cloudy. Patchy fog this morning. Highs 83 to 86 towards the coast to 89 to 92 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 18 Aug Orange County Inland

Partly cloudy. Patchy fog overnight. Lows 64 to 69. Areas of Winds southwest to 10 Mph in the evening becoming light.

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Walnut Canyon Reservoir Temperature Statistics

August Temperature

Corona Airport (9.3 miles)

  • Lowest 15 August, 2026

    59 °F

  • Average August

    76.6 °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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