For room temperatures or air temperatures, integer °C is exactly the right amount of resolution. The difference between 20°C and 21°C is pretty much exactly what I would be able to tell apart.
And on the other hand, for body temperatures, tenths of °C as a level of resolution is just right, whereas integer °F would be too coarse.
And on the other hand, for body temperatures, tenths of °C as a level of resolution is just right, whereas integer °F would be too coarse.