2000 cirrus issue

why is it when it rains or is moist out, the car has difficulty starting? I had a vibration that sounded like a wheel bearing or cv joint. I replaced all drive axels, cv joints, wheel bearings & differential joints. Could it be the timing chain causing the vibration?

Yes, it could.

In future you could save aton of money by having problems diagnosed before changing parts. Now, with this problem, might be a good time to start.