Walnut Weather Forecast

    • 57
    • 66

    Rain Showers

    • 55
    • 66

    Rain Showers

    • 47
    • 63

    Rain Showers Likely

    • 46
    • 62

    Sunny

    • 48
    • 66

    Sunny

    • 51
    • 69

    Mostly Sunny

Today 24 Dec Orange County Inland

Showers and a slight chance of Thunderstorms. Locally heavy rainfall possible. Highs around 65. Areas of Winds south 20 to 30 Mph. Gusts to 45 Mph. Becoming 40 Mph in the afternoon.

Tonight 24 Dec Orange County Inland

Showers and a slight chance of Thunderstorms. Locally heavy rainfall possible in the evening. Lows 53 to 57. Areas of Winds south 10 to 20 Mph. Gusts to 35 Mph in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Walnut Temperature Statistics

December Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 December, 2025

    48 °F

  • Average December

    59.6 °F

  • Highest 9 December, 2025

    82 °F

Climate (2020–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2020–2025

    58.7 °F

  • Average 2020–2025

    65.6 °F

  • Average High 2020–2025

    73.3 °F
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