The highest day temperature in December 2025 was 98°F. The lowest night temperature was 66°F. The average values for day and night temperatures during December were 90.7°F и 74.2°F respectivly.

The average sea surface temperature in December 2025 for Merida was 81.1°F. The maximum and minimum values were 80.0°F and 82.4°F respectively.

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

Precipitation total in December for Merida is 0.9 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 7.0 mph.

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 Merida in December is 6.0 hours.