I just don't see what your getting at. If I understand what you posted, those are the times of day you can expect the lowest humidity in the listed citys. The lowest humidity for NO was 60.7 at 3PM. The lowest humidity for Buffalo was 62.4 at 4PM. all that tells me is at some point in the day it will be less humid in NO then it ever will in Buffalo. You seem to be making my case, not yours.