IMERG offers Global Accumulated Precipitation Information

The Integrated Multi-satellitE Retrievals for Global Precipitation Measurment or IMERG released through NASA GES DISC, is a global rainfall dataset providing precipitation rates for the whole planet every half hour. Estimating the amount of accumulated rainfall for any region over a period of time is possible using IMERG. The NASA Scientific Visualization Studio site offers an animation that shows an example of rainfall in the planet during a week in August, 2014 and can be accessed here