Weather seems like it is a factor and in the throws of a cycle we reach for any explanation for our pain. With barometric pressure reports on our phones, watching the weather patterns etc. We all desperately look for an explanation so we can find hope in certain patterns. I used to think it was barometric pressure drop, then I thought it was barometric pressure instability, for a while I was convinced moon phase mattered. I have tracked for myself and in my case weather changes are coincidental to whatever circadian trigger hits our hypothalamus. I believe there are migraine tracking apps looking at weather too. Most studies debunk pressure changes but some suggest validity. There are lists of places with the least to most barometric pressure changes and I do not think it correlates with incidence of disease.