Rio San Juan Rainfall At Rio San Juan in Dominican Republic, for a period of record spanning 1971 – 2012 average annual rainfall sum = 2211.3 mm wettest year on record = 4108.4 mm of rainfall in 1996 driest year on record = 1325.9 mm of rainfall in 2011 wettest month on average = 277.8 mm … Continue reading Rio San Juan Rainfall