It's been below freezing here for about a week and it seems a new rattle shows up daily. The headliner rattle around the sunroof and front overhead console occur regardless of temp; but they really don't hit my annoyance threshold. I did have the tweeter speaker grill rattle on the passenger door that was loud but swapping out the speaker (Polk Audio) eliminated the issue. Recently a center console rattle/buzz has popped up that's really annoying.
These rattles and buzzes are what I am most disappointed with on an otherwise great car that's 10 months old.