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Looking to Download Data? The Drought.gov team reformats data from multiple partners into web- and GIS-ready formats, which we use throughout Drought.gov. These data are free for all to download.
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Global Historical Climatology Network (GHCN): an integrated database of daily climate summaries from land surface stations across the globe, including a common suite of quality assurance reviews.&n

The GPCC provides unrestricted access to its monthly gridded precipitation data sets for climate monitoring purposes and related research.

This Standardized Precipitation Index (SPI) is derived from the Global Precipitation Climatology Centre's gridded monthly precipitation dataset.

GPCC Drought Index: a standardized anomaly of precipitation and potential evapotranspiration regarding to long-term means.