Walnut Weather Forecast

    • 58
    • 83

    Decreasing Clouds

    • 59
    • 84

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

    • 60
    • 88

    Partly Sunny

Today 22 Mar Orange County Inland

Partly cloudy this morning. Becoming mostly sunny. Highs around 80 towards the coast to 82 to 85 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 22 Mar Orange County Inland

Mostly clear in the evening. Becoming partly cloudy overnight with patchy fog. Lows 56 to 59. Areas of Winds south to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Walnut Temperature Statistics

March Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 6 March, 2026

    52 °F

  • Average March

    69.2 °F

  • Highest 17 March, 2026

    95.6 °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

    65.9 °F

  • Average High 2021–2026

    73.7 °F
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