Cayenne Rainfall

At Cayenne in French Guiana, for a period of record spanning 1971 – 2014
average annual rainfall sum = 2934.5 mm
wettest year on record = 4633 mm of rainfall in 1989
driest year on record = 1831.4 mm of rainfall in 1995
wettest month on average = 509.6 mm of rainfall in May
wettest month on record = 1020.6 mm of rainfall in May 1984
peak of wet season = Apr. to June on average with an average of 1246.6 mm of rainfall
wettest 3-month period on record = 1943 mm of rainfall in Jan. to Mar. 1989
driest month on average = 39 mm of rainfall in September
driest month on record = 0 mm of rainfall in October 1976
peak of dry season on average = Aug. to Oct. with 192.2 mm of rainfall
driest 3-month period on record = 50.4 mm of rainfall in Sept. to Nov. 1997
Below are links to charts of Monthly and Seasonal rainfall values. Click on each of the thumbnail images to see the respective full image.
Cayenne French Guiana Monthly Rainfall
 
Cayenne French Guiana Seasonal Rainfall