Walnut Weather Forecast

    • 78
    • 102

    Hot

    • 77
    • 102

    Hot

    • 73
    • 102

    Hot

    • 71
    • 99

    Hot

    • 70
    • 98

    Hot

    • 67
    • 94

    Mostly Sunny

Today 4 Oct Los Angeles County San Gabriel Valley

Sunny. Highs 99 to 106.

Tonight 4 Oct Los Angeles County San Gabriel Valley

Clear. Lows in the 70s to lower 80s.

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Walnut Temperature Statistics

October Temperature

Brackett Field Airport (6.8 miles)

  • Lowest 1 October, 2026

    64.4 °F

  • Average October

    86 °F

  • Highest 2 October, 2026

    102.2 °F

Climate (2021–2026)

Brackett Field Airport (6.8 miles)

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  • Average Low 2021–2026

    56.1 °F

  • Average 2021–2026

    68.1 °F

  • Average High 2021–2026

    76 °F
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