Punta Cana Rainfall At Punta Cana in Dominican Republic, for a period of record spanning 1971 – 2012 average annual rainfall sum = 1134.6 mm wettest year on record = 1663.1 mm of rainfall in 1981 driest year on record = 521.6 mm of rainfall in 1991 wettest month on average = 141.2 mm of rainfall …