To cite package ‘GHCNr’ in publications use:

  Berti E (2025). _GHCNr: Download Weather Station Data from GHCNd_. R
  package version 1.4.5, <https://github.com/emilio-berti/ghcnr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {GHCNr: Download Weather Station Data from GHCNd},
    author = {Emilio Berti},
    year = {2025},
    note = {R package version 1.4.5},
    url = {https://github.com/emilio-berti/ghcnr},
  }