Annual Cumulative Precipitation

The Global Precipitation Climatology Centre (GPCC) Monthly Precipitation dataset provides gridded gauge-analysis products focusing on land-surface precipitation. This dataset serves as a high-quality observational baseline for climate monitoring across Africa. It is constructed from quality-controlled data from thousands of rain gauges worldwide. At ACMAD, this data often serves as the "truth" or reference layer for calibrating satellite estimates and for calculating long-term indices like SPI. It is critical for retrospective analysis, model verification, and understanding the climatological context of current weather events.

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Climate Hazards Group InfraRed Precipitation with Station data (CHIRPS) is a quasi-global rainfall dataset spanning 50S to 50N from 1981 to near present. It blends 0.05 degree satellite imagery with in-situ station data to create gridded rainfall time series for trend analysis and seasonal drought monitoring.

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Average precipitation is the long-term average in depth (over space and time) of annual precipitation in the country. Precipitation is defined as any kind of water that falls from clouds as a liquid or a solid.