The highest day temperature in December 2025 was 90°F. The lowest night temperature was 74°F. The average values for day and night temperatures during December were 84.7°F и 78.8°F respectivly.

The average sea surface temperature in December 2025 for Isla Mujeres was 85.7°F. The maximum and minimum values were 84.6°F and 86.8°F respectively.

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

Precipitation total in December for Isla Mujeres is 0.7 in.

The average wind speed in December is 9.7 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 Isla Mujeres in December is 4.5 hours.