The highest day temperature in December 2025 was 93°F. The lowest night temperature was 57°F. The average values for day and night temperatures during December were 78.2°F и 69.2°F respectivly.

The average sea surface temperature in December 2025 for Piriapolis was 74.5°F. The maximum and minimum values were 66.0°F and 81.6°F respectively.

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

Precipitation total in December for Piriapolis is 0.8 in. It makes december the least rainy month of the year.

The average wind speed in December is 13.1 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 Piriapolis in December is 10.2 hours.