Should humidity be consistancy?

[TurkeyKeeper]

I just recently got an incubator and I have already put it to use. I have 2 turkey eggs in it and I am waiting for some eggs I ordered to arrive. The temperature is consistent, but I have noticed that this morning the humidity was at 65 and today in the afternoon it has gone down to 57. I'm worried as to whether or not I'm supposed to keep the humidity constant in some way. Can anyone help?

 

[muddy75]

Humidity changes and you basically want to keep it in an optimal range for your area and the type of eggs you’re hatching. For my hatching, I typically shoot for 30-45% until lockdown when I raise it to 60-65%

Incubator instruments can be off so having a salt-tested accessory hygrometer can help with ensuring accuracy

There are many good articles on here explaining humidity levels and hatching

 

[ChickenCanoe]

In my opinion, humidity doesn't have to be consistent. In nature, a hen will encounter all ranges of humidity and she can't prevent her eggs from experiencing that same disparity. Ambient humidity can range from the teens to 97+ during a rainstorm. All the hen can do is hunker down on the eggs to prevent that released from the eggs to be lost to the environment.
That said, I think 65% is too high for early in incubation.
For humidity during incubation, what you are trying to achieve is a specific weight loss throughout, not a set humidity at any one point.