Climate }}The climate of San Juan is relatively dry and warm with mild winters. The average annual temperature is 19.1 °C, with, on average, about 19 days per year experiencing below freezing temperatures. Most precipitation falls in the summer months, amounting to more than 700 mm per year. The municipality is located in a region called Los Altos. It has a territory of 874.47 square kilometers, bordering the municipalities of
Teocaltiche,
Encarnación de Díaz,
Jalostotitlan,
San Miguel el Alto,
San Julián,
Unión de San Antonio and
Lagos de Moreno. The municipality has an average altitude of 1750 meters above mean sea level, with most of the area consisting of flat land or rolling hills, with altitude differences reaching only 200 meters. The lowest point is the San Juan River at 1700 meters, and the highest elevation is to the south, at the Lozano and Los Indios mesas at about 1900 meters. The area is part of the
Lerma River/
Lake Chapala/
Santiago River basin and the Verde/Grande de Belén/Santiago-Atotonilco River sub-basin. The main rivers through the municipality are San Juan (Lagos) and El Agostadero, with three dams Peña de León, Los Laureles and Alcalá. Streams include El Cedral, El Carrizo, San Antonio, El Barroso, El Corralillo, La Cañada, Mata Gorda, El Maguey, El Arrastradero, El Chilarillo, Santa Rosa, Los Trujillos and La Labor. There are also a number of fresh water springs including Santa Rosa and Charco del Tigre.
Flora and fauna Most of the municipality is covered in arid grassland and other dry area plants such as cactus,
maguey and arid scrub. About three hundred hectares is filled with dense vegetation, mostly cactus and thorny scrub. Predominant wildlife includes:
coyotes,
pumas, wildcats, wolves, deer (only in areas with abundant vegetation), rabbits, squirrels,
opossums,
armadillos and
moles. ==Socioeconomics==