El Potosí National Park

The climate is mostly montane and semi-arid, with an annual average temperature between 12 and 18 °C. Temperatures in the coldest month range from -3 to 18 °C, and the temperature in the hottest month is less than 22 °C. The western portion of the park is generally warmer, with an average annual temperature between 18 and 22 °C.^[2]

Rainfall is heaviest in the summer months. Atlantic hurricanes occasionally come ashore from the Gulf of Mexico, bringing intense rain and causing flooding in the region.^[2]

The park experienced a severe drought from 2010 to 2012.^[2]

The predominant plant community is pine–oak forest.^[2]

285 species of wild plants, classed in 207 genera and 84 families, are found in the park. Characteristic tree species include oaks (Quercus resinosa, Quercus potosina, and Quercus laeta), pines (Pinus pseudostrobus and Pinus teocote), madroño (Arbutus xalapensis, lantrisco (Rhus virens), bodero (Dodonaea viscosa), and laurel (Litsea schaffneri). Other characteristic plants include yerbanís (Tagetes lucida), acedia (Ageratum corymbosum) carrestolianda (Senecio aschenbornianus), and calaguala (Polypodium aureum). Three locally-occurring species are accorded special protection by the government – Ferocactus histrix, a cactus locally known as borrachitas biznaga, the orchid Laelia speciosa, known as laelia de mayo or mayito, and the cycad Ceratozamia zaragozae, locally known as palmita.^[2]

The drought of 2010–2012 weakened many trees, making them vulnerable to pine bark beetles (Dendroctonus sp.) Many pine trees, especially young ones, died, particularly in the northern and southern portions of the park.^[2]