Geography[ edit ] Lake Zumpango at north of Lake of Texcoco. About half of the territory is flat, mostly in the south with hills and small mountains in the north.
The highest elevation is the Cerro del Zitlaltepec at meters above sea level. The main surface water is Lake Zumpango , which extends over 2, hectares. There are also some seasonal streams, the Gran Canal and other tunnels dug to drain the Valley of Mexico. The first effort was in , when a canal was dug to drain Lake Zumpango into the Tula River. It lowered lake levels but did not eliminate flooding.
Further drainage efforts and over pumping of groundwater continued to dry Lake Zumpango until it disappeared in It was then decided to bring the lake back as a regulator, filling it with water from a new drainage canal called the Canal del Desague. This use of the lake was opposed by local people in and because of the dumping of wastewater, which led to compromises and infrastructure for irrigation.
The lake attracts weekend visitors despite the poor water quality because of the good climate and abundant local vegetation. This has led to accidents on the lake including some deaths. The climate is temperate with an average annual temperature of 14C.
The coldest months are from November to March when temperatures can reach The warmest months are from April to June when temperatures can reach 31C. Freezes are not uncommon in the winter and hail can fall in May and June during thunderstorms. Prevailing winds are from the north and are strongest in February.
