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.