Walnut Canyon Reservoir Weather Forecast

    • 62
    • 87

    Mostly Sunny

    • 62
    • 85

    Mostly Sunny

    • 65
    • 89

    Mostly Sunny

    • 68
    • 94

    Mostly Sunny

    • 71
    • 98

    Hot

    • 72
    • 98

    Hot

Today 29 Sep Orange County Inland

Sunny. Highs 85 to 88. Light Winds becoming west 10 to 15 Mph with Gusts to 25 Mph this afternoon.

Tonight 29 Sep Orange County Inland

Clear in the evening. Becoming partly cloudy. Lows 61 to 67. Areas of Winds southeast 10 Mph.

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Walnut Canyon Reservoir Temperature Statistics

September Temperature

Corona Airport (9.3 miles)

  • Lowest 2 September, 2026

    53.1 °F

  • Average September

    73.8 °F

  • Highest 9 September, 2026

    109 °F

Climate (2021–2026)

Corona Airport (9.3 miles)

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  • Average Low 2021–2026

    52.4 °F

  • Average 2021–2026

    65.2 °F

  • Average High 2021–2026

    78.4 °F
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