To cite package ‘rdwd’ in publications use:

  Boessenkool B (2026). _rdwd: Select and Download Climate Data from
  'DWD' (German Weather Service)_. R package version 1.9.17,
  <https://CRAN.R-project.org/package=rdwd>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {rdwd: Select and Download Climate Data from 'DWD' (German Weather
Service)},
    author = {Berry Boessenkool},
    year = {2026},
    note = {R package version 1.9.17},
    url = {https://CRAN.R-project.org/package=rdwd},
  }