There are many different gods of rain in different religions:
Chaac, in Maya religion;
Tohil, in K'iche' Maya mythology
Q'uq'umatz, another K'iche' Maya rain god
Tlaloc, in Aztec and all the other Nahua religions;
Cocijo, in Zapotec religion;
Tirípeme Curicaueri, in Purépecha religion;
Dzahui, in Mixtec religion;
Mu'ye, in Otomi religion
Jaguar, in Olmec religion
Quiateot of the Nicarao people in Nicaragua
Bi Xing, (Yu Shi, Master of Rain)
Chi Chongzi, God of Rain
Sometimes, the Dragon Kings were also responsible for rain
Twenty Four Wind Herding & Rain Summoning Guardians
Deng Zhong
Sim Huan
Chang Jie
Tao Rong
Pang Hong
Liu Fu
Gou Zhang
Bi Huan
Qin Wan
Zhao Jiang
Dong Quan
Yuan Jue
Bo Li
Wang Bian
Yao Bin
Shao
Sun Liang
Ji Li
Yu Qing
Li De
Jin Su
Huang Geng
Han Zhixian
Wen Ying
Lono, who was also a fertility god
Indra
Mariamman
Shakambhari
Surupa, sky goddess who brings rain
Blizgulis, god of snow
Dodola, goddess of rain
Dudumitsa, Bulgarian goddess of rain
Achek, wife of the rain god Deng
Oya, goddess of violent rainstorms
Yuttoere, in De'ne' and Carrier
Asiaq, goddess among Greenlandic Inuit, and Inuit in Northern Canada
Shotokunungwa of Hopi people
Tó Neinilii of Navajo people
Eschetewuarha of Chamacoco
Chibchacum in the religion of the Muisca
Baal
Kalden
Lumo, sky goddess of rain and mist
the Wandjina
List of rain deities Wikipedia (Text) CC BY-SA