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GHCN Monthly

NCEI first developed the Global Historical Climatology Network-Monthly (GHCN-M) temperature dataset in the early 1990s. Subsequent iterations include version 2 in 1997, version 3 in May 2011, and version 4 in October 2018.

Contact

For questions specific to GHCNM, please email NCDC.GHCNM@noaa.gov