Here's something cool a friend of mine showed me today - Weather.com now has an aches and pains index that rates from 1-10 the aches you might experience from the weather.
Those of us who feel like walking barometers and wake up in the morning saying that your trick knee tells you that it is going to rain today will love this feature. My sinuses and migraines tell me when there is a weather pressure change coming, and my aches and pains (knees, hips, backs) tell me when it's damp. It's going to be interesting to follow the aches and pains index and see if they hold true.