Cancun has a warm sub-humid climate regime, influenced by local factors such as the constant sea breeze and high atmospheric humidity, due to its proximity to the waters of the Caribbean Sea, as well as the low elevation above sea level and the absence of orographic prominences that could stop the humid air currents.
The average annual temperature oscillates around 27ºC (80ºF) and the average temperature extremes are 19ºC (66ºF) (minimum) and 35.2ºC ( 95ºF) (maximum), with the AW0 climatic subtype being the driest of the warm sub-humid subtypes. The monthly average temperature variation between the coldest month and the hottest month is less than 5°C (41°F), so it is considered isothermal with rainfall in summer.
The rainy season is from May to October with downpours, while the dry season with occasional and isolated rains occurs from March to April, and the northerly season with heavy drizzle generally from November to February. The average annual precipitation is 1,334.6 mm, with records ranging from 1,032 mm (1996) to 1,955.3 mm (1998).
During the year, there are variations in wind direction and speed, due to the influence of subtropical downdrafts that migrate from the high-pressure zones to the equatorial low-pressure zones, with trade winds predominating throughout the year. In the months of the year (January - May), the winds come from east to southeast direction with an average speed of 3.2 m/sec, which we call dominant winds. From June to September, the winds circulate in an east to west direction, with an average speed of 3.5 m/sec. From November to December, the wind direction changes to the north and presents speeds of 2 m/sec, which coincides with the beginning of the "Nortes" ("Northern") season.
The most relevant climatological phenomena are hurricanes and northerlies. Cyclonic phenomena in the Atlantic and Caribbean region are caused by temperature elevations that generate the warming of marine waters, since in the periods from May to November the sun's rays strike perpendicularly on the terrestrial sphere. The "nortes" are masses of cold continental air that in their passage through the Gulf of Mexico are loaded with humidity and generate rainy conditions accompanied by strong winds that prevent or limit the navigation of small boats.