Mare Island Shoreline Heritage Preserve Weather Forecast

    • 57
    • 70

    Mostly Sunny

    • 58
    • 75

    Mostly Sunny

    • 58
    • 71

    Mostly Sunny

    • 58
    • 70

    Mostly Sunny

    • 58
    • 71

    Mostly Sunny

    • 58
    • 72

    Mostly Sunny

Today 13 Sep Southwestern Solano County Including Vallejo

Sunny. Highs 73 to 81. West Winds 10 to 15 Mph with Gusts to around 25 Mph.

Tonight 13 Sep Southwestern Solano County Including Vallejo

Clear. Patchy smoke after midnight. Lows around 57. West Winds up to 15 Mph.

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Mare Island Shoreline Heritage Preserve Temperature Statistics

September Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    67.9 °F

  • Highest 9 September, 2026

    98.1 °F

Climate (2021–2026)

Napa, Napa County Airport (8.7 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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