To cite 'weathercan' in publications, please use:

  LaZerte, Stefanie E and Sam Albers (2018). weathercan: Download and
  format weather data from Environment and Climate Change Canada. The
  Journal of Open Source Software 3(22):571. doi:10.21105/joss.00571.

A BibTeX entry for LaTeX users is

  @Article{,
    title = {{weathercan}: {D}ownload and format weather data from Environment and Climate Change Canada},
    author = {Stefanie E LaZerte and Sam Albers},
    journal = {The Journal of Open Source Software},
    volume = {3},
    number = {22},
    pages = {571},
    year = {2018},
    url = {https://joss.theoj.org/papers/10.21105/joss.00571},
  }