Monticello Dam Weather Forecast

    • 46
    • 68

    Increasing Clouds

    • 53
    • 67

    Chance Rain Showers

    • 51
    • 69

    Chance Rain Showers

    • 47
    • 67

    Slight Chance Rain Showers

    • 48
    • 69

    Mostly Sunny

    • 48
    • 69

    Slight Chance Rain

Today 19 Oct North Bay Interior Mountains

Sunny late in the morning then becoming partly cloudy. Highs in the 50s to upper 60s. West Winds 5 to 10 Mph.

Tonight 19 Oct North Bay Interior Mountains

Cloudy. Lows in the upper 40s. West Winds up to 5 Mph in the evening. Becoming light.

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Monticello Dam Temperature Statistics

October Temperature

Vacaville Nut Tree Airport (11.8 miles)

  • Lowest 14 October, 2026

    44.7 °F

  • Average October

    72.6 °F

  • Highest 5 October, 2026

    101.6 °F

Climate (2021–2026)

Vacaville Nut Tree Airport (11.8 miles)

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  • Average Low 2021–2026

    49.3 °F

  • Average 2021–2026

    63 °F

  • Average High 2021–2026

    76.9 °F
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