Yes I do have thermometer and a hygrometer. I have found temperature ok for torts as per the range except only 2-3 Weeks in winter. I am in Pune. As you said they find there hide and warm spots....I leave small burrows of warm cloth for them indoor...they have hides made up of soil outdoor (using gamla Hindi word).....I even maintain humidity with a manual spray ...see whole point is..without knowing the actual cause one should not mislead other keeper...inn India the way we care can be different...worrying about temperature humidity and stuff is ok but the way I manage it can be different from what a person is doing sitting in America...plus I again say temperature is problem most of the times but NOT ALWAYS.