Walnut Canyon Reservoir Weather Forecast

    • 67
    • 93

    Increasing Clouds

    • 66
    • 89

    Rain Showers Likely

    • 66
    • 80

    Rain Showers Likely

    • 64
    • 80

    Chance Rain Showers

    • 65
    • 84

    Partly Sunny

    • 67
    • 86

    Partly Sunny

    • 67
    • 87

    Mostly Sunny

Today 16 Sep Orange County Inland

Patchy fog this morning. Mostly sunny. Highs around 90 towards the coast to 93 farther inland. Light Winds becoming west 10 Mph this afternoon.

Tonight 16 Sep Orange County Inland

Mostly clear this evening. Becoming partly cloudy. Lows 65 to 69. Areas of Winds west to 10 Mph this evening becoming light.

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Walnut Canyon Reservoir Temperature Statistics

September Temperature

Corona Airport (9.3 miles)

  • Lowest 12 September, 2025

    54 °F

  • Average September

    74.5 °F

  • Highest 2 September, 2025

    102.9 °F

Climate (2020–Present)

Corona Airport (9.3 miles)

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  • Average Low 2020–2025

    52.2 °F

  • Average 2020–2025

    65 °F

  • Average High 2020–2025

    78.1 °F
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