Monticello Dam Weather Forecast

    • 53
    • 81

    Mostly Sunny

    • 53
    • 76

    Increasing Clouds

    • 52
    • 80

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 53
    • 79

    Mostly Sunny

    • 55
    • 86

    Sunny

Today 21 Jul North Bay Interior Mountains

Sunny. Highs in the mid 60s to lower 80s. Southwest Winds around 10 Mph.

Tonight 21 Jul North Bay Interior Mountains

Partly cloudy. Lows in the 50s. West Winds 5 to 10 Mph.

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  • Temperature Real-Time

Monticello Dam Temperature Statistics

July Temperature

Vacaville Nut Tree Airport (11.8 miles)

  • Lowest 5 July, 2025

    52.6 °F

  • Average July

    76.1 °F

  • Highest 1 July, 2025

    105.7 °F

Climate (2020–Present)

Vacaville Nut Tree Airport (11.8 miles)

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  • Average Low 2020–2025

    49.1 °F

  • Average 2020–2025

    63 °F

  • Average High 2020–2025

    77.3 °F
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