Can you feel the difference between 23.5° and 24? I can't. You don't often need precision to tenths.

In Australia most weather providers give you whole degrees, the bureau of meteorology gives you to one decimal in reports and whole degrees in forecasts

My coffee and beer boilers can hit high precision temperatures to variously 0.1° or 0.5° precision. The beer boiler gives 3 digits - hundredths below 10°, tenths below 100°, whole numbers 100° and over

You can choose the precision of thermometers you wish to buy for yourself

I have seen fahrenheit thermometers which are hard to read to better precision than 5 degrees