Walnut Weather Forecast

    • 65
    • 79

    Rain Showers

    • 57
    • 70

    Rain Showers

    • 52
    • 64

    Chance Rain Showers

    • 50
    • 63

    Partly Sunny

    • 52
    • 67

    Partly Sunny

    • 52
    • 68

    Partly Sunny

Today 19 Sep Bureau

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Near steady temperature in the upper 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 19 Sep Bureau

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Patchy fog after midnight. Humid with Lows in the mid 60s. Southeast Winds around 5 Mph, becoming west around 5 Mph after midnight. Chance of rain 90 percent.

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Walnut Temperature Statistics

September Temperature

Sterling Rockfalls (13 miles)

  • Lowest 14 September, 2026

    48.9 °F

  • Average September

    73.3 °F

  • Highest 2 September, 2026

    96.1 °F

Climate (2021–2026)

Sterling Rockfalls (13 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    62.1 °F
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