Walnut Weather Forecast

    • 55
    • 79

    Sunny

    • 55
    • 81

    Sunny

    • 55
    • 80

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 55
    • 80

    Partly Sunny

    • 55
    • 78

    Mostly Sunny

Today 13 Jan Orange County Inland

Sunny. Highs around 77. Areas of Winds northeast 10 to 20 Mph with Gusts to 35 Mph becoming west 10 to 15 Mph with Gusts to 25 Mph in the afternoon.

Tonight 13 Jan Orange County Inland

Clear. Lows around 53. Areas of Winds northeast to 10 Mph with Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Walnut Temperature Statistics

January Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 8 January, 2026

    48 °F

  • Average January

    60.1 °F

  • Highest 10 January, 2026

    73 °F

Climate (2021–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2021–2026

    58.8 °F

  • Average 2021–2026

    65.7 °F

  • Average High 2021–2026

    73.3 °F
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