Mexico’s climate varies from arid to tropical with it really splitting into two parts. The Tropic of Cancer divides the country in two so one part is temperate and the other, tropical.
Therefore land to the north has cooler temperatures during the winter months while more southerly regions see temperatures remain fairly constant year round. The differences that do exist are almost exclusively down to altitude. Because of the country’s topography, Mexico has one of the world’s most diverse climate systems.
Head south to the coastal plains and the Yucatán Peninsula, and you will find average temperatures from around 75.2 to 82.4 °F. Temperatures stay high all year in this region and only really varying by about 9 °F between the highs of summer and the lows of winter.
This is quite a bit higher than more northern regions, although there is more variation in the north with summers being hotter and winters colder.