Newell Open Space Weather Forecast

    • 52
    • 68

    Partly Sunny

    • 52
    • 71

    Partly Sunny

    • 53
    • 68

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

    • 58
    • 79

    Partly Sunny

    • 61
    • 77

    Mostly Sunny

Today 4 Sep North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 60s to upper 70s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 4 Sep North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the 40s to mid 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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Newell Open Space Temperature Statistics

September Temperature

Napa, Napa County Airport (3.1 miles)

  • Lowest 2 September, 2026

    55 °F

  • Average September

    64.9 °F

  • Highest 2 September, 2026

    73.9 °F

Climate (2021–2026)

Napa, Napa County Airport (3.1 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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