Possible Clues:

• Chaac, to Mayans
• Tlaloc, to the Aztecs
• Focus of some early farmers' worship
• Maverick adoring Zeus or Freyr?
• Cocijo, to the Zapotecs
• Indra, to Hindus
• Gorad, cryptically, or Pluvius
• One invoked during a drought
• Shower head?
• One prayed to during a dry spell