When I was 18, I broke my leg on a snow mobile... My best friend Jeff, just got out of his cast after breaking the same leg...
After I healed and got my cast off, Jeff and I would be cruising around and we would get a "feeling" in our legs and look at each other and say, "It's going to rain tomorrow"...
Sure enough, it would rain within 24 hours of us feeling that twinge in our "broken bones"...
We would get a slight pain in our legs a day before it rained.. I think it had some sensitivity to the barometer pressure...