Your thermostat is probably lying to you—its sensor probably doesn't have the precision it tells you it has. I also have a bridge to sell you if you believe tha

Your thermostat is probably lying to you—its sensor probably doesn't have the precision it tells you it has. I also have a bridge to sell you if you believe that everywhere in your house is exactly XY °F. My room is considerably cooler than my kitchen, with a temperature difference of as much as 10 °C, especially when I am cooking multiple dishes. If I open my back door in said kitchen, then the temperature rapidly and noticeably plummets, even if several of the gas hobs are on. You discuss 'precision', but then you don't take the next step of realising that any precision comes with a built-in uncertainty, and the 'human feel' of temperature has a massive uncertainty of as much as ±7 °C—depending on, as the other commenter said, wind, humidity, shade, and internal body temperature. I've been raised entirely in a metric country, and have never used degrees Fahrenheit. It was a complete novelty for me when I was younger, and in many ways still is. It is a matter of 'what is more intuitive'. Room temperature is 25 °C, human body temperature is 36 °C, a fever is about 38 °C, it is freezing outside when it is 0 °C or below, and water boils at 100 °C.