UKCP09 25 km gridded data for days of rainfall
Monthly long-term averages for the 1961-1990 climate baseline are also available for the 25 x 25 km grid boxes of the HadRM3 regional climate model. Each 25 x 25 km grid box value is an average of the 5 x 5 km grid cell values that fall within it.
The datasets have been created with financial support from the Department for Environment, Food and Rural Affairs (Defra) and they are being promoted by the UK Climate Impacts Programme (UKCIP) as part of the UK Climate Projections (UKCP09). http://ukclimateprojections.defra.gov.uk/content/view/12/689/.
Zip file contains 17 text files (one for each month, season and the year as a whole). The individual grids are named according to the following convention:
vvvvvv1961-1990LTA25kmppp.txt
where 'vvvvvv' is the variable name and 'ppp' is the averaging period, i.e. jan, feb, mar, etc. (for individual months), djf (winter), mam (spring), jja (summer), son (autumn) or ann (for the annual average).
Single netCDF file that contains the data for all months, seasons and the year as a whole.
To view this data you will have to register on the Met Office website, here: http://www.metoffice.gov.uk/research/climate/climate-monitoring/UKCP09/register