With Celsius it's all nice and round numbers unlike the mess called fahrenheit:
0°C—black ice, snow, be careful on the road and you probably want to wear gloves and a hat
0...10°C—a bit chilly, but you can leave your hat home
10...20°C—pleasant, but not quite tee-and-shorts yet
20...30°C—nice summer weather
30...40°C—holy crap it's hot!
40...50°C—are you fucking kidding me?
50+°C—my proteins are starting to denature...
100°C—good sauna
110°C—finns think it's a good sauna
120+°C—finns think it's getting a bit too hot in the sauna. Italians tend to vaporize in sauna (speaking from experience)
...
0...-10°C—a pleasant winter weather
-10...-20°C—getting a bit frosty
-20...-30°C—finns think it's a pleasant winter weather
-40°C—vodka freezes. Russians and finns agree it's getting a bit frosty
-50°C—getting a little hard to start your Uazik in the morning in Siberia due to engine oil solidifying
-60°C—researchers in Antarctica all agree it's getting a bit frosty and someone should close the window
To be honest, a 10°C range is way too much variation for me to consider it as the same 'category' (at least in the 0°C ~ 40°C range). I say that as a Brazilian.
See that's my issue with degrees C. It's not as fine a measurement as degrees F. A difference of 5F is not terribly much, but it is noticeable. A difference of 5C is substantial (to me) and would make me very uncomfortable. So with F, I can know with more precision how uncomfortable I should expect to be :)