Adjective for "a person who really suffers when it is cold"

Solution 1:

Nesh. But you might find that few people understand this.

Nesh is an English dialect adjective meaning unusually susceptible to cold weather and there is no synonym for this use. Usage has been recorded in Cheshire, Staffordshire, the East Midlands, Lancashire, South Yorkshire, West Yorkshire, Derbyshire and Shropshire.

It includes over-sensitivity — my hardy friend calls me this when I moan about the cold.

Solution 2:

You're probably looking for cold sensitive or thin blooded. There is no common single adjective that I know of for that idea, just the technical term thermosensitive. Here in Taiwan, I always use "Taiwanese", however, because many southern Taiwanese are just like "John". When the temp drops to below 20C, they wear arctic-quality parkas & complain about the cold: "It's freezing!"

Solution 3:

My grandmother would have referred to such a person as a chilly mortal. I can only find a passing reference to this online where the term is defined as meaning nesh.

Solution 4:

I've heard the terms 'reptile' or 'reptilian' being used in this way. The intent is sometimes more about someone who stays inside and doesn't do anything when it is cold, rather than someone who is up and about but rugged up and/or complaining about it. None the less I have heard it used (and used it myself) in the general sense of someone who is sensitive to the cold.