...a bit dry...

What do you attribute that to?

They look wonderful!

Did any of your navels stay on the tree during a previous lighter frost, at least 32*?
I have had navels that were lightly frosted do that dry out thing. Seems like just the tops of the fruit freeze, then when they defrost the juice from the damaged part evaporates out through the skin.

The frost bursts the thin membranes of the citrus "sacks" (for want of a better word) that hold the juice in the flesh. Then the juice is just free in the fruit and can evaporate.
Just the tops because that the first part that freezes, top down.
The rest of the fruit is edible, but eat them fast as they can go bad faster than undamaged fruit, and keep them in you veggie crisper in the fridge, in a plastic bag.

I've seen it happen to whole fruits too, that have had really bad freezes. It's like freeze-dried.

yes, we had an earlier freeze around Halloween. i use one of those green freeze cloths to cover them up.

seems like its not all of them. just ate one today and it was good.

i thought it was either from uneven watering or being on the tree too long.

If you used a frost blanket, then the dried out part was probably due to the dry weather early in the year, and again before autumn. I have had too much of it since 2010. This year some of my Monreal Clementines had dried tops. But you could cut that part of and they tasted super. Freeze damage ruins the taste, and I had too much of that last year.

I just finished Thursday, giving a total of ten crates of citrus to churches and poor people. The people at one church could not believe the fruit tasted so good.