Walnut Canyon Reservoir Weather Forecast

    • 49
    • 69

    Mostly Cloudy

    • 48
    • 70

    Patchy Fog

    • 50
    • 71

    Mostly Cloudy

    • 54
    • 68

    Rain Showers

    • 54
    • 64

    Rain Showers

    • 51
    • 65

    Rain Showers

Today 20 Dec Orange County Inland

Mostly cloudy with patchy fog in the morning. Becoming partly cloudy. Highs around 70. Light Winds.

Tonight 20 Dec Orange County Inland

Partly cloudy in the evening. Becoming mostly cloudy overnight with patchy fog. Lows around 51. Light Winds.

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Walnut Canyon Reservoir Temperature Statistics

December Temperature

Corona Airport (9.3 miles)

  • Lowest 6 December, 2025

    37 °F

  • Average December

    61.7 °F

  • Highest 10 December, 2025

    90 °F

Climate (2020–Present)

Corona Airport (9.3 miles)

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  • Average Low 2020–2025

    52.1 °F

  • Average 2020–2025

    64.8 °F

  • Average High 2020–2025

    78 °F
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