Napa River - Horseshoe Bend Weather Forecast

    • 57
    • 87

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

    • 53
    • 74

    Partly Sunny

Today 10 Sep North Bay Interior Valleys

Sunny. Highs in the lower 80s to mid 90s. West Winds 10 to 20 Mph.

Tonight 10 Sep North Bay Interior Valleys

Mostly clear. Lows in the mid 50s to lower 60s. Southwest Winds 10 to 20 Mph.

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  • Temperature Real-Time

Napa River - Horseshoe Bend Temperature Statistics

September Temperature

Napa, Napa County Airport (2.5 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    65.7 °F

  • Highest 8 September, 2026

    93 °F

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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