Temper! is a science fiction fanzine by Dan Zissman, Judy Zissman, later known as Judith Merril, and Damon Knight.
Subtitled "The Family Magazine", Temper! was published in May 1945, in New York, U.S.A.
Damon Knight's contribution is entitled "On Hood River, Oregon", in which he mockingly describes the residents of his home town as illiterate utra-conservative hillbillies. There is also a discussion of the Vanguard Prospectus.