Similar word to temperate:

agreeable, balmy, checked, clement, collected, composed, conservative, constant, cool, curbed, discreet, dispassionate, equable, even, even-tempered, fair, gentle, levelheaded, medium, mild, modest, pleasant, reasonable, regulated, restrained, self-controlled, self-restrained, sensible, sober, soft, stable, steady, unexcessive, unextreme, unimpassioned, warm