Isla Mujeres Weather in December

The climate in Isla Mujeres during December can be summarized as hot, humid and a little damp.

December is in the winter in Isla Mujeres and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 18°C (65°F) is normal.

On average December is the 5th driest month of the year in Isla Mujeres with around 81mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.8 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Isla Mujeres in December 2025.