Atlas Peak Weather Forecast

    • 55
    • 77

    Mostly Sunny

    • 54
    • 69

    Partly Sunny

    • 55
    • 74

    Mostly Sunny

    • 58
    • 78

    Sunny

    • 57
    • 81

    Mostly Sunny

    • 57
    • 78

    Mostly Sunny

Today 15 Sep North Bay Interior Mountains

Sunny. Highs in the 70s to mid 80s. Southeast Winds up to 5 Mph. Becoming southwest in the afternoon.

Tonight 15 Sep North Bay Interior Mountains

Mostly clear. Lows in the 50s. Southwest Winds 5 to 10 Mph in the evening. Becoming light.

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Atlas Peak Temperature Statistics

September Temperature

Napa, Napa County Airport (16.8 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    67.4 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Napa, Napa County Airport (16.8 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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