Mount Vaca Weather Forecast

    • 52
    • 63

    Increasing Clouds

    • 58
    • 65

    Partly Sunny

    • 63
    • 76

    Sunny

    • 60
    • 78

    Mostly Sunny

    • 60
    • 73

    Partly Sunny

    • 64
    • 76

    Mostly Sunny

Today 16 Sep North Bay Interior Mountains

Sunny. Highs in the 60s to mid 70s. Southwest Winds 5 to 10 Mph.

Tonight 16 Sep North Bay Interior Mountains

Partly cloudy in the evening then becoming mostly cloudy. Lows in the 50s. Southwest Winds 5 to 10 Mph.

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Mount Vaca Temperature Statistics

September Temperature

Vacaville Nut Tree Airport (8.1 miles)

  • Lowest 5 September, 2026

    49.6 °F

  • Average September

    73 °F

  • Highest 10 September, 2026

    107.7 °F

Climate (2021–2026)

Vacaville Nut Tree Airport (8.1 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    62.9 °F

  • Average High 2021–2026

    76.8 °F
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