I remember people reporting this at launch. Some saying this was an issue as far back as the alpha. Asobo always considered it user error in that people weren’t setting their live weather correctly. If you file a Zendesk ticket, you get a canned reply with the steps to enable live weather as it should work, and your ticket is closed. Only that “official fix” only works on the first flight for many of us.
For me, Live Weather worked fine (when it actually worked) until the last November patch. It hasn’t worked since without using this workaround.