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.