Climate

Almost two-thirds of the country consists of plateaux and high mountains with a climate that is warm-temperate; other parts have a tropical climate with temperature reduced by altitude. Along the coast it is hot and humid. Inland communities at higher elevations such as Guadalajara (5200 ft above sea level) and in particular close-by Lake Chapala, are much dryer and more temperate.

Most climate in Mexico has sunny weather for a large part of the year. The cloudiest regions are the wetter parts of the east coast and the northern part of the Pacific coast, where low cloud and fog are formed over the cold ocean current. The drier regions of the interior and much of the tierra templada have high amounts of sunshine: as much as seven or eight hours a day in the drier months to five or six during the wetter season.

Mexico City (Ciudad de Mexico), with its much higher elevation of 7545.93 ft (2300 sq meters) above sea level, can reach freezing temperatures in the winter. You'll be surprised to find snow-capped volcanoes. San Miguel de Allende also experiences colder winters due to its close proximity to Mexico City.

The rainy season over the whole country is the period of high sun from May to October. The rest of the year is not completely rainless, but the amount and frequency of rain in the winter season is low. The wettest part of the country is the lowland on the Caribbean coast; the north coast of the Yucatan peninsula is relatively much drier than the east coast or the interior. Annual rainfall here is between 1,000 m/40 in and 1,500 m/60 in, but some places in northern Yucatan get less than 500 mm/20 in.

The shores of the Pacific and Gulf of California, north of the Tropic of Cancer, get less than 250 mm/10 in of rain a year, but this increases southwards to between 1,000 mm/40 in and 1,500 mm/60 in. Rainfall is heaviest where the coast is backed by high mountains.

(Source: http://www.focusonmexico.com)