Sunshine and humidity, warm temperatures in the 70s and 80s with little rainfall characterize the weather in Cancún in February. Cancún is located between the equator and the Tropic of Cancer in an area known as the tropics. The tropics enjoy very consistent temperatures throughout the year.
It is advisable to bring a light jacket or a sweater to Cancún during the cooler months of December through February as low temperatures tend to be in the mid 60s. Pack swimwear as well because the average sea temperature this time of year is 79 F. The constant, year-round sunshine in Cancún is largely responsible for its position as one of Mexico's largest tourist destinations.