I'm just checking in quickly today to show my Temperature Scarf at the 3-month mark. The colours that the cooler temperatures correspond to are:
20-23: grass green
17-19: light blue
14-16: medium blue
13 and under: grey
I don't imagine it will get much cooler, but Winter has only just started and it's been very cold already, so it's possible I might need to create a new category. I have to admit that would be a little exciting!