The mean seasonal rainfall for both the historical and modern records is 85 cm, and the series exhibits both year to year and decadal variability. The ordinate units are cm. Please acknowledge Dr. Parthasarathy when using this data. The first data value, 849.1 mm, is for 1871. All India rainfall is an areal average of 29 subdivisional rainfalls.
Subdivisonal rainfalls are from areally averaged district rainfalls.
The district rainfall is computed from averaging all stations in the district. The data is consistent from 1871 - 1990 in that it is constructed from a 306 station network, with no missing data. The number and distribution of stations for 1991 - 1994 is unknown. Station distibution is unknown. A cursory examination of the seasonal-total values provided in these two publications indicate that they are typically within a few millimeters of those in the table above.