Walnut Weather Forecast

    • 63
    • 94

    Mostly Sunny

    • 62
    • 92

    Mostly Sunny

    • 63
    • 90

    Sunny

    • 61
    • 92

    Mostly Sunny

    • 59
    • 86

    Patchy Fog

    • 58
    • 82

    Partly Sunny

Today 17 Mar Orange County Inland

Mostly sunny. Highs 90 to 94 towards the coast to 93 to 98 farther inland. Areas of Winds northeast to 10 Mph with Gusts to 25 Mph becoming west 10 Mph this afternoon.

Tonight 17 Mar Orange County Inland

Clear. Lows 60 to 66. Light Winds.

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Walnut Temperature Statistics

March Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 March, 2026

    52 °F

  • Average March

    66.4 °F

  • Highest 12 March, 2026

    91 °F

Climate (2021–Present)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2021–2026

    58.9 °F

  • Average 2021–2026

    65.8 °F

  • Average High 2021–2026

    73.6 °F
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