Is there a way to display other layers than just the “wind-layer”?
https://github.com/santi4488/MMM-windy

I´d like to switch between snow in winter and thunderstorms/rain in summer…

I imported FA via the custom.css file. Maybe this will work for you?

@import url("https://use.fontawesome.com/releases/v5.3.1/css/all.css");

Exactly the same thing here…

Is there a way to display description / location values of the events in the calendar modules in a separate line?