Weather can be another source of back pain for some. Many people are not aware of the effects that weather has on their bodies. Cold weather, in particular, can aggravate a back problem since the muscles tend to constrict in cold weather. Drafts and dampness can also be detrimental to a bad back. Be sure to keep yourself warm and dry during cold weather. Layering your clothes on these days can be helpful.
Information taken from The Bum Back Book by Michael Reed Gach.