GD Riviere Rainfall At GD. Riviere in Martinique, for a period of record spanning 1971 – 2014 average annual rainfall sum = 2705.5 mm wettest year on record = 3624.8 mm of rainfall in 2008 driest year on record = 1335.9 mm of rainfall in 2007 wettest month on average = 335.2 mm of rainfall in … Continue reading GD Riviere Rainfall