Why is the ninth month called September?
c.1600, "to burn with a hissing sound," perhaps a frequentative form of Middle English sissen "hiss, buzz" (c.1300), of imitative origin. The figurative sense is attested from 1859. Related: Sizzled; sizzling. The noun is first recorded 1823.
Hot, in any sense: sell some of the sizzling green at a discount (1845+)