Monticello Dam Weather Forecast

    • 53
    • 76

    Becoming Sunny

    • 53
    • 78

    Mostly Sunny

    • 55
    • 76

    Mostly Sunny

    • 54
    • 78

    Mostly Sunny

    • 53
    • 74

    Partly Sunny

    • 55
    • 69

    Mostly Cloudy

    • 53
    • 64

    Rain Likely

Today 30 Oct North Bay Interior Mountains

Partly cloudy. Highs in the lower 60s to mid 70s. Light Winds. Becoming southwest around 5 Mph in the afternoon.

Tonight 30 Oct North Bay Interior Mountains

Partly cloudy in the evening then becoming mostly clear. Lows in the mid 50s. North Winds around 5 Mph.

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Monticello Dam Temperature Statistics

October Temperature

Vacaville Nut Tree Airport (11.8 miles)

  • Lowest 28 October, 2025

    43 °F

  • Average October

    62.4 °F

  • Highest 7 October, 2025

    91 °F

Climate (2020–Present)

Vacaville Nut Tree Airport (11.8 miles)

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  • Average Low 2020–2025

    49 °F

  • Average 2020–2025

    62.8 °F

  • Average High 2020–2025

    77 °F
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