The highest day temperature in December 2023 was 85°F. The lowest night temperature was 71°F. The average values for day and night temperatures during December were 79.8°F и 78.6°F respectivly.

The average sea surface temperature in December 2023 for Cayo Guillermo was 83.2°F. The maximum and minimum values were 81.0°F and 85.4°F respectively.

You can expect various weather conditions during December. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in December for Cayo Guillermo is 1.1 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 13.8 mph. It makes December one of the most windy months of the year for Cayo Guillermo.

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 Cayo Guillermo in December is 5.5 hours.