Temperature
late Middle English: from French température or Latin temperatura, from temperare ‘restrain’. The word originally denoted the state of being tempered or mixed, later becoming synonymous with temperament. The modern sense dates from the late 17th century.
wiktionary
Borrowed from Latin temperatura [1] (cf. also French température), from the past participle stem of tempero(“I temper”).
etymonline
temperature (n.)
mid-15c., "fact of being tempered, proper proportion;" 1530s, "character or nature of a substance," from Latin temperatura "a tempering, moderation," from temperatus, past participle of temperare "to mix in due proportion, modify, blend; restrain oneself" (see temper (v.)). Sense of "degree of heat or cold" first recorded 1670 (Boyle), from Latin temperatura, used in this sense by Galileo. Meaning "fever, high temperature" is attested from 1898.
