Question: Atemoztli, the sixteenth month of the Aztec calendar, is also a festival in the Aztec religion dedicated to which pantheon god of rain?

Context paragraphs:
Huey Tecuilhuitl: Huey Tecuilhuitl also called Uey Tecuilhuitl is the name of the eighth month of the Aztec calendar.  It is also a festival in the Aztec religion dedicated to Xilonen and Cihuacoatl.  It is called the Great festival of the Lords.

Izcalli: Izcalli is the name of the Eighteenth and last month of the Aztec calendar.  It is also a festival in the Aztec religion, the principal deity is Xiuhtecuhtli the fire God and old People are honored this month and is known as Rebirth Month .

Huey Tozoztli: Huey Tozoztli also known as Huey Tocoztli is the name of the fourth month of the Aztec calendar. It is also a festival in the Aztec religion dedicated to Tlaloc and other deities.It is called the Great or long vigil.

Aztec religion: The Aztec religion is the Mesoamerican religion of the Aztecs. Like other Mesoamerican religions, it had elements of human sacrifice in connection with a large number of religious festivals which were held according to patterns of the Aztec calendar.  Polytheistic in its theology, the religion recognized a large and ever increasing pantheon of gods and goddesses; the Aztecs would often incorporate deities whose cults came from other geographic regions or peoples into their own religious practice.

Tepeilhuitl: Tepeilhuitl is the name of the thirteenth month of the Aztec calendar. It is also a festival in the Aztec religion dedicated to Popocatepetl, Iztaccihuatl and Tlaloc It is called the festival or feast of the Mountains

Etzalcualiztli: Etzalcualiztli is the name of the sixth month of the Aztec calendar.  It is also a festival in the Aztec religion dedicated to Tlaloc and Chalchihuitlicue.

Tlaloc: Tlaloc () was part of the pantheon of gods in Aztec religion.  As supreme god of the rain, Tlaloc was also by extension a god of earthly fertility and of water.  He was widely worshipped as a beneficent giver of life and sustenance, but he was also feared for his ability to send hail, thunder, and lightning, and for being the lord of the powerful element of water.  Tlaloc is also associated with caves, springs, and mountains, most specifically the sacred mountain in which he was believed to reside.  His animal forms include herons and water-dwelling creatures such as amphibians, snails, and possibly sea creatures, particularly shellfish.  The Mexican marigold, "Tagetes lucida", known to the Aztecs as yauhtli, was another important symbol of the god, and was burned as a ritual incense in native religious ceremonies.

Tecuilhuitontli: Tecuilhuitontli is the name of the Seventh month of the Aztec calendar.  It is also a festival in the Aztec religion.  The principal deity is Xochipilli and feasts are also given to Goddess Huixtocihuatl and it is known as the Small Festival of the Lords.

Tlaxochimaco: Tlaxochimaco is the name of the ninth Month of the Aztec calendar.  It is also a festival in the Aztec religion, dedicated to the Aztec God of War Huitzilopochtli.  It is called the Bestowal or Birth of Flowers.

Atemoztli: Atemoztli is the sixteenth month of the Aztec calendar.  It is also a festival in the Aztec religion dedicated to Tlaloc and Tlaloque.

Supporting paragraphs: Atemoztli Tlaloc
Answer: Tlaloc