Today while waiting outside a restaurant for my huarache to cook, I saw a giant thermometer on the front of the building next door. I decided once and for all to commit to memory a way of making Cº temperatures useful to me. What this looked like to passersby was a man muttering under his breath while staring at a giant thermometer for 10 minutes.
These are my results:
Assuming you are experiencing the temperature outside, not accounting for wind chill:
40's and up: You might be in hell; or Arizona
30's: Uncomfortably hot. Hopefully you are swimming rather than wearing a suit in a subway station
20's: This is the temperature of Heaven
10's: Use a jacket/sweater
under 10: heavy coat. Also, you might be in hell, except now it burns cold.