Not warm but not very cold (4)
I believe the answer is:
cool
(Other definitions for cool that I've seen before include "Hip - not warm" , "Modern calmness, brrr!" , "At fairly low temperature" , "Casual and confident - not heated" , "Chilled" .)
I believe the answer is:
cool
(Other definitions for cool that I've seen before include "Hip - not warm" , "Modern calmness, brrr!" , "At fairly low temperature" , "Casual and confident - not heated" , "Chilled" .)