The Long-Term Mean Monthly Discharges and Annual Characteristics offer basic statistics of all stations being represented in the Global Runoff Database:

- annual means, lowest, and highest monthly discharges for individual years,

- long-term mean, lowest, and highest monthly discharges of time series with at least five years of observation each with at least ten monthly values,

- long-term inner-annual mean, lowest and highest monthly discharges of time series with at least five values of a specific month, and their standard deviations.

The monthly primary values are provided station by station as ASCII-text files, named with pvm-prefix and station numbers. For download, all files are grouped by WMO Regions. Please note, that statistics are only provided for timeseries of daily discharge values from years with less than ten months and months with less than ten days missing.