Cozumel is an island and municipality in the Caribbean Sea off the eastern coast of Mexico's Yucatán Peninsula, opposite Playa del Carmen, and close to the Yucatán Channel. The municipality is part of the state of Quintana Roo, Mexico. The economy of Cozumel is based on tourism, with visitors able to benefit from the island's balnearios, scuba diving, and snorkeling. The main town on the island is San Miguel de Cozumel. Cozumel has tropical savanna climate the dry season is short, from February to April, but even in these months precipitation happens, averaging about 45 millimetres (1.8 in) of rain per month. The Maya are believed to have first settled Cozumel by the early part of the 1st millennium AD, and older Preclassic Olmec artifacts have been found on the island as well. The Festival of Santa Cruz and El Cedral Fair is a historical tradition held in the town of El Cedral, in the south of Cozumel Island at the end of April.