Uitvlugt Rainfall At Uitvlugt in Guyana, for a period of record spanning 1979 – 2014 average annual rainfall sum = 2667.5 mm wettest year on record = 3915.9 mm of rainfall in 1993 driest year on record = 1533.1 mm of rainfall in 2001 wettest month on average = 395.8 mm of rainfall in June wettest …