$alien: "\f075";
  $celsius: "\f03c";
  $fahrenheit: "\f045";
  $degrees: "\f042";
  $thermometer: "\f055";
  $thermometer-exterior: "\f053";
  $thermometer-internal: "\f054";
  $cloud-down: "\f03d";
  $cloud-up: "\f040";
  $cloud-refresh: "\f03e";
  $horizon: "\f047";
  $horizon-alt: "\f046";
  $sunrise: "\f051";
  $sunset: "\f052";
  $moonrise: "\f0c9";
  $moonset: "\f0ca";
  $refresh: "\f04c";
  $refresh-alt: "\f04b";
  $umbrella: "\f084";
  $barometer: "\f079";
  $humidity: "\f07a";
  $na: "\f07b";
  $train: "\f0cb";