The highest day temperature in December 2025 was 92°F. The lowest night temperature was 61°F. The average values for day and night temperatures during December were 80.0°F и 72.7°F respectivly.

The average sea surface temperature in December 2025 for Colonia del Sacramento was 80.5°F. The maximum and minimum values were 75.4°F and 85.0°F respectively.

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

Precipitation total in December for Colonia del Sacramento is 2.4 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 11.9 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 Colonia del Sacramento in December is 11.7 hours.