To cite weathermetics in publications use:

Anderson GB, Bell ML, Peng RD (2013). “Methods to calculate the heat index as an exposure metric in environmental health research.” Environemtental Health Perspectives, 121(10), 1111-1119. http://ehp.niehs.nih.gov/1206273/.

Corresponding BibTeX entry:

  @Article{,
    title = {Methods to calculate the heat index as an exposure metric
      in environmental health research},
    author = {G. Brooke Anderson and Michelle L. Bell and Roger D.
      Peng},
    journal = {Environemtental Health Perspectives},
    year = {2013},
    volume = {121},
    number = {10},
    pages = {1111-1119},
    url = {http://ehp.niehs.nih.gov/1206273/},
  }