Reasons for building

I built this out of frustration with existing options for making windrose charts. Moreover it was a project for checking out some libraries and frameworks I wanted to learn.

Tips for further editing

Downloading the windrose chart as SVG is recommended. SVG's can be edited in a vector editing program like Inkscape (free & open-source), Adobe Illustrator, or Sketch to manually edit it.
If you know a little about SVG syntax you can open it in text editor (like VS Code) and edit it directly.

Other options for making wind rose charts

Need even more control over your wind rose? If you're familiar with D3.js, here's a good Observable notebookto get you started.

JavaScript not your jam, but Python or R are? Check out python-windrose, a matplotlib-based library or use this R script.