In the shade. No-one hangs thermometers in the sun here. But yeah; a house grade thermometer is not that accurate I guess. Thing is; when the heatwave (and hurricane after it) was at that time, it was so hot that people (and dogs) were vomiting (including me) because it was so hot (I am not from here and definitely not used to this kind of weather; I had the same problem when I was in India during a heatwave). This year nothing came close; neither on my imperfect thermometer nor the physical struggles.