Walnut Weather Forecast

    • 75
    • 97

    Patchy Fog

    • 73
    • 98

    Hot

    • 70
    • 94

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

    • 68
    • 86

    Mostly Sunny

    • 69
    • 86

    Chance Rain Showers

    • 70
    • 88

    Partly Sunny

Today 27 Aug Orange County Inland

Patchy fog this morning. Partly cloudy. Highs 92 to 96 towards the coast to 100 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 27 Aug Orange County Inland

Partly cloudy. Lows 70 to 75. Areas of Winds south to 10 Mph this evening becoming light.

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  • Temperature Real-Time

Walnut Temperature Statistics

August Temperature

John Wayne-Orange County Airport (4.3 miles)

  • Lowest 5 August, 2026

    68.6 °F

  • Average August

    77.3 °F

  • Highest 23 August, 2026

    93.7 °F

Climate (2021–2026)

John Wayne-Orange County Airport (4.3 miles)

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  • Average Low 2021–2026

    59 °F

  • Average 2021–2026

    66.1 °F

  • Average High 2021–2026

    73.7 °F
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