Sonoma Creek - Richard Janson Bridge Weather Forecast

    • 58
    • 80

    Mostly Sunny

    • 64
    • 81

    Partly Sunny

    • 67
    • 89

    Partly Sunny

    • 62
    • 85

    Mostly Sunny

    • 58
    • 77

    Mostly Sunny

    • 57
    • 75

    Partly Sunny

Today 7 Sep Southwestern Solano County Including Vallejo

Sunny, warmer. Highs 80 to 90. Northwest Winds up to 10 Mph.

Tonight 7 Sep Southwestern Solano County Including Vallejo

Clear. Lows around 60. West Winds up to 10 Mph.

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Sonoma Creek - Richard Janson Bridge Temperature Statistics

September Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 2 September, 2026

    54.6 °F

  • Average September

    63.9 °F

  • Highest 2 September, 2026

    74.6 °F

Climate (2021–2026)

Napa, Napa County Airport (7.5 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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