Mexico is a country with a vast climatic diversity. The geographical situation of the country locates it in two well differentiated areas separated by the Tropic of Cancer. This parallel would climatically separate the country in a tropical zone and a moderate zone. Nevertheless, the orography and the presence of the oceans influence very much the configuration of the climate map of in the country. Thus in the country it is possible to find high mountain cold climates just a few hundred kilometers away from the warm climates of the coastal flatlands.
It is not possible to generalize on the climatic conditions of the country, since the changes of altitude in relation with the sea level, create a multitude of microsystems with particular characteristics.
Climate varies in different areas, according to the altitude of each. Along the coast it's generally tropical (hot and humid), and in Mexico City the weather is more moderate, with pleasant (but rainy) summers and mild winters. Seasonal temperatures vary little, but May is usually the warmest month, and January the coldest.
Many may be surprised to learn that the majority of the country is made up of an elevated plateau and high-rising mountains. Imagery of the hot, sunny beaches and fecund jungles is fitting, but only for portions of the Pacific coast and the Yucatan Peninsula.
Regardless of location, the general climate in Mexico is warm-temperate, and most of the nation experiences year-round sunny weather. In places with higher altitude - Mexico City included - foreigners may experience a shortness of breath until they acclimate to the pressure change. These locales can experience extremely hot temperatures during the day and sudden shifts to cold in the evenings.
Most of the coastal regions, as well the towns that are at sea level, generally have a semitropical climate. The Mexican coastlines are known for their high temperatures, averaging between 32°C to 35°C throughout the year, and their moderate to high level of rainfall.
In the summer cyclones are frequent, the so called "nortes" the Gulf of Mexico coastline. Occasional tropical storms between the months of August to September may also wreak havoc and bring heavy rains. Otherwise, precipitation in Mexico is most common between June and November. The remaining months of the year are relatively dry. This feature serves to separate seasons in Mexico rather than temperature difference.
The average temperature for the country is approximately 19 °C. Nevertheless, Mexico City presents extreme averages in January (12 °C) and July (16,1 °C). In contrast with Ciudad Juárez, Mexicali, Culiacán, San Luis Potosí, Hermosillo, Nuevo Laredo, Torreón, Saltillo and Monterrey where temperatures are really extreme.
If you want to have a clearer idea of the climate you should expect to find at the location you plan to visit, we invite you to consult Mexico Film Friendly's climatic regions map. Alternatively you may want access the National Meteorological Service, a Federal Government agency whose mandate is to provide the climate information of the country. The methods of the institution are efficient and its indicators are very useful to know the climatic conditions of any region. Their services are free of charge and daily reports may be requested.