I'm pretty close to the ocean, so unless we have an easterly flow, like last week, it is pretty rare to see more than 85f in these parts.
I also have 2 layers of reflectix wrapped around the battery and it is sitting on a layer too, so perhaps that dense mass does not really swing with ambient temps all that much.
I might just top the cells up, do an EQ and record that baseline, and figure when the electrolyte levels drop to the current level, I can expect 1.290 and higher.
I'll be all grumpy again at seeing 12.0 or less, when I'm used to seeing 12.2 at a certain depletion level, but oh well. It is not as if anything I am running has issues with 12.0, and perhaps the lower morning starting voltage makes my MPPT controller a Smidge more efficient for a while.