San Juan Rainfall

At San Juan in Puerto Rico, for a period of record spanning 1971 – 2014
average annual rainfall sum = 1403.8 mm
wettest year on record = 2273.1 mm of rainfall in 2010
driest year on record = 902.4 mm of rainfall in 1991
wettest month on average = 160.2 mm of rainfall in November
wettest month on record = 471.4 mm of rainfall in August 2011
peak of wet season = Sept. to Nov. on average with an average of 443.8 mm of rainfall
wettest 3-month period on record = 1098.2 mm of rainfall in June to Aug. 2011
driest month on average = 55 mm of rainfall in March
driest month on record = 0 mm of rainfall in March 2005
peak of dry season on average = Jan. to Mar. with 197.5 mm of rainfall
driest 3-month period on record = 59.9 mm of rainfall in Jan. to Mar. 1983
Below are links to charts of Monthly and Seasonal rainfall values. Click on each of the thumbnail images to see the respective full image.
San Juan Puerto Rico Monthly Rainfall
 
San Juan Puerto Rico Seasonal Rainfall