You can look outside in winter and know that if it is raining the air temperature is above freezing without a temperature scale. It’s pretty apparent by the fact that the water is not freezing.

And how often does knowing that your pot of boiling water is 100 degrees or your ice tray is 0 help you?

I have never been making pasta and thought to myself “wow, sure is nice I know the exact temperature of this water right now”