The highest day temperature in December 2025 was 92°F. The lowest night temperature was 67°F. The average values for day and night temperatures during December were 87.1°F и 73.4°F respectivly.

The average sea surface temperature in December 2025 for Nuevo Vallarta was 83.0°F. The maximum and minimum values were 80.6°F and 84.8°F respectively.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Nuevo Vallarta is 0.2 in.

The average wind speed in December is 3.3 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Nuevo Vallarta in December is 8.4 hours.