Yeah I think there's a correlation here. What'd be cool is if we were all able to get tested, to see if there's a pattern. I know for myself that sunshine helps a lot!
It's summer here in Chile, and my POIS, at least the muscle, back and joint symptoms are way reduced.
We had a slight weather system pass through just yesterday. I always feel the weather system a day or two before it's evident, sunny skies, hot weather and I start to feel the aches and pains. Sure enough, a weather system came the next day. Felt bad through the weather system, and as fast as it came, it went as the weather system passed through.
And I am getting lots of sun, but something in the weather systems screw me around.
We are inflamed and the soft tissues are subject to humidity and pressure changes.
It's funny, but some of the aches and pains don't feel like joints and muscles, but I think that the swollen tissues press on nerves or something.