Thank you so much for your comments on my question. I find it amazing how the weather can affect AS. In France, the humidity is low all year round, so I don't know if high humidity would have an effect on me.
Following that discussion, I have another question: has anyone tried some kind of "heating jacket" to relieve their pain? I'm thinking about buying a jacket that works with a charging battery. These jackets are quite expensive but I think they might be very efficient in reducing pain. Any thought on that?
Thank you again for your answers, it's always nice to hear feedback and tips from people who can actually understand what daily life is with AS.