Piarco Airport Rainfall At Piarco Airport in Trinidad, for a period of record spanning 1971 – 2014 average annual rainfall sum = 1877.7 mm wettest year on record = 2603.2 mm of rainfall in 1981 driest year on record = 1453.7 mm of rainfall in 1987 wettest month on average = 251.2 mm of rainfall in …