American Canyon Weather Forecast

    • 58
    • 86

    Becoming Sunny

    • 58
    • 88

    Mostly Sunny

    • 56
    • 84

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 57
    • 82

    Mostly Sunny

Today 1 Aug North Bay Interior Valleys

Sunny. Haze and patchy smoke. Highs in the 80s to 90s. Southwest Winds 5 to 15 Mph.

Tonight 1 Aug North Bay Interior Valleys

Mostly clear. Haze and patchy smoke. Lows in the lower 50s to mid 60s. West Winds 10 to 15 Mph.

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American Canyon Temperature Statistics

August Temperature

Napa, Napa County Airport (2.5 miles)

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  • Average August

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Climate (2021–2026)

Napa, Napa County Airport (2.5 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    70.3 °F
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