Mards Rainfall At Mards in Guyana, for a period of record spanning 1979 – 2014 average annual rainfall sum = 1861.5 mm wettest year on record = 2799.1 mm of rainfall in 2008 driest year on record = 1028.2 mm of rainfall in 1991 wettest month on average = 257.2 mm of rainfall in June wettest … Continue reading Mards Rainfall