

No shit. And yet when you look at the weather temperatures, the reports are all without a decimal.
No shit weather forecasts are without a decimal. Why would they include a decimal? Do you think weather forecasts are that accurate? I’ll bet all weather models calculate in celsius anyway, they just convert to Fahrenheit and round it. The error bars are probably much larger than a degree celsius to begin with.
And when you set your thermostat, it is also without a decimal.
No it’s not. My thermostat and pretty much all digital thermometers I have around the house use 1 decimal.







This is again not really an issue with the thermostat. Back in the day they were analog so in theory they had infinite precision. Early digital ones didn’t have that level of precision because there was no point to it. The heating system itself simply wasn’t that precise. The temperature would swing quite a bit around the set temperature. The heating would be either on or off, so it would heat to a bit above the set temp, then cool down to a bit below it, etc. It would have been the same for Celsius or Fahrenheit.
Modern central heating uses a modulating heater, so it will only heat the radiators a little when the temperature difference to the set temperature is small, resulting in a more constant and thus more comfortable temperature. It’s even better with in-floor heating where the concrete slab of the flooring acts as a huge thermal buffer. Due to this more precise thermostats make sense (but only up to a point, because who can tell the difference between 20.0ºC and 20.1ºC)
Accurate how? If they predict a temperature of 18ºC, it will be around that temperature for a short time in the middle of the day, but outside temperatures aren’t constant. It’s coldest just before dawn and hottest in the afternoon. Between those two extremes the temperature rises and falls over the day. What is the point in saying it will be 18.4ºC instead of just saying 18º? There is no need for that level of precision. Even outside the temperature change over the day, the temperature also changes significantly depending on location. If I’m in an area with lots of trees and shade the temperature will be much lower than if I’m on an asphalt street. So even as you walk around the temperature will vary a lot.