This document consists of rainfall data for 100 years i.e from 1901 to 2011 published by Indian Meteorological Department (IMD).
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/data-rainfall-1901-2011
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/indian-metrological-department
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rainfall
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/monsoons
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/weather-predictions
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-meteorological-department-imd