GPCC V6 rain gauge precipitation dataset
X axis: whole world in 720 0.50° steps, first point at 179.75° W, last point at 179.75° E
Y axis: regular grid with 360 -0.50° steps, first point at 89.75° N, last point at 89.75° S

Monthly data available from Jan1901 to Dec2010 (1320 months)
Variable prcp (precipitation) in mm/month

Get grid points, average area or generate subset

Latitude:	°N - °N
Longitude:	°E - °E
Boundaries:	halfway grid points interpolated
Make:	average set of grid points subset of the field
Demand at least:	% valid points in this region
Units:	convert to mm/day leave in mm/month

Create a field with lower time resolution

New time scale:	annual (Jul-Jun) annual (Jan-Dec) seasonal monthly 10-daily 5-daily daily
New variable:	mean sd sum sum above sum below number min time of min max time of max first time last time of precipitation
Threshold:	no cut less than greater than mm/month percentile normal 1971-2000
Minimum:	% valid data

Construct a statistical forecast model from this field

Please consider downloading this field from the authoritative site.

If you really want to get it here, GPCC V6 0.5 precipitation is available as GrADS .ctl and gzipped .dat files (size 1305.18 MB)
Alternatively, you can generate a gzipped netCDF file of the same size.