Weather icon font and CSS themed icons specially created for Open Weather Map API, are ready to be used in any project. Place the contents from the fonts and css folder in your project, assuming that your fonts are located under a ../fonts/ path relative to your CSS directory. The icons are displayed by using the i element and adding the base class owi and the icon class that you want, such as a owi owi-01d the code 01d is the icon code that you get from Open Weather Map.