The data mentioned above is at the horizontal resolution of 0.25 deg. The product is already aggregated from 3 hourly dataset as mentioned in the second link cited by Dibakar. You can retrieve the data at point locations from the above data (assuming it to be netcdf file, if not then convert it using cdo) using Climate data operator, or R programming. The command for extracting it at a point location is:

cdo remapnn,lat,lon inputfile outputfile

you can further process the output file for averaging or seasonal processing as per requirement. Please let me know if you face any problem.

yes, you can, what is your resolution

Thanks a lot for the constructive comments, it's really helpful !

A resolution of 0.25 deg would be perfect for my work !