My body does the same...the dampness in the air affects the body. I know for instance I could not thrive in Seattle. I would be sick and achy versus Arizona.
The barometor of water in the air adds pressure. I think it adds wt to our bodies in some fashion. You feel weighted and heavier, putting more pressure on the joints.
Things tend to swell and expand. In drier climates your shrink, your skin is drier, everything is drier.