> In Fahrenheit: 0: very cold to people; 100: very hot to people. > > In Celsius: 0: not that cold; 100: I died 50 degrees ago.

Celsius 0 and below, warning there could be ice on the road.

Hot/cold is too subjective. My relation to heat/cold was not the same when I was living in north of France, Swiss alps and now in south of Spain.