Heat (11)
(Other definitions for temperature that I've seen before include "Measure of heat" , "Degree of hotness" , "Degree of heat" , "Measure of warmth" .)
'heat' is the definition.
(I know that warmth is a type of heat)
This is the entire clue.
(Other definitions for warmth that I've seen before include "Affection, kindness; emotional intensity" , "Comfort" , "Result if heated" , "tenderness" , "Cordiality" .)