Monticello Dam Weather Forecast

    • 40
    • 56

    Mostly Sunny

    • 38
    • 58

    Mostly Sunny

    • 40
    • 57

    Mostly Sunny

    • 39
    • 58

    Mostly Sunny

    • 39
    • 58

    Mostly Sunny

    • 44
    • 62

    Mostly Sunny

    • 41
    • 61

    Mostly Sunny

Today 17 Jan North Bay Interior Mountains

Sunny. Highs in the 40s to upper 50s. Light Winds. Becoming southwest around 5 Mph in the afternoon.

Tonight 17 Jan North Bay Interior Mountains

Mostly clear. Lows in the lower 40s. Light Winds. Becoming northeast around 5 Mph after midnight.

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Monticello Dam Temperature Statistics

January Temperature

Vacaville Nut Tree Airport (11.8 miles)

  • Lowest 15 January, 2025

    32 °F

  • Average January

    52.3 °F

  • Highest 9 January, 2025

    75.7 °F

Climate (2020–Present)

Vacaville Nut Tree Airport (11.8 miles)

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  • Average Low 2020–2025

    49.3 °F

  • Average 2020–2025

    63.1 °F

  • Average High 2020–2025

    77.3 °F
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