Walnut Weather Forecast

    • 59
    • 87

    Increasing Clouds

    • 58
    • 85

    Partly Sunny

    • 60
    • 84

    Mostly Sunny

    • 60
    • 85

    Mostly Sunny

    • 60
    • 87

    Mostly Sunny

    • 60
    • 87

    Partly Sunny

Today 21 Mar Orange County Inland

Partly cloudy. Highs 83 to 86 towards the coast to 90 farther inland. Light Winds becoming southwest 10 Mph this afternoon.

Tonight 21 Mar Orange County Inland

Partly cloudy. Areas of fog overnight. Lows around 60. Areas of Winds southwest to 10 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • 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 °F

  • Highest 17 March, 2026

    95.6 °F

Climate (2021–Present)

John Wayne-Orange County Airport (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    58.9 °F

  • Average 2021–2026

    65.9 °F

  • Average High 2021–2026

    73.6 °F
Get WillyWeather+ to remove ads