I find it helpful to do similar, but mine is fuzzier and tied to day-to-day activities. I am a gross farenheit user, so this is my mental table for cross reference
-42|-42: 9th layer of hell
0|32: freezing point
10-15: maybe think about a jacket
20-25: room temp
37|98: body temp
50: death valley
100|212: boiling
It's not precise, except for some intersection points, but it sticks well for me and allows me to be conversational enough to impress metric-folks when I convert my temps to rough Celsius for them. It's rare to need precise temp in conversation.
