Is it too humid to incubate?

[lakenvelder]

I am new to incubating eggs and it is unusually humid here right now. I tried hatching 5 eggs last month without having a hygrometer and all of the eggs but one grew to full maturity but not even one had an internal pip. My humidity in the incubator is currently 50-55% without any eggs or water added. The humidity levels also seem to be all over the place. Will I have trouble getting these eggs to hatch? Looking for opinions as to do what to do. Its incredibly disheartening to see those little babies fully grown that never came out. (BTW, I waited 28 days before giving up). Thanks for opinions, especially from those of you in this humid Southern weather!