The Collaborative International Dictionary of English v.0.48:

Temperate \Tem"per*ate\, a. [L. temperatus, p. p. of temperare.
   See Temper, v. t.]
   1. Moderate; not excessive; as, temperate heat; a temperate
      climate.
      [1913 Webster]

   2. Not marked with passion; not violent; cool; calm; as,
      temperate language.
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            She is not hot, but temperate as the morn. --Shak.
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            That sober freedom out of which there springs
            Our loyal passion for our temperate kings.
                                                  --Tennyson.
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   3. Moderate in the indulgence of the natural appetites or
      passions; as, temperate in eating and drinking.
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            Be sober and temperate, and you will be healthy.
                                                  --Franklin.
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   4. Proceeding from temperance. [R.]
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            The temperate sleeps, and spirits light as air.
                                                  --Pope.
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   Temperate zone (Geog.), that part of the earth which lies
      between either tropic and the corresponding polar circle;
      -- so called because the heat is less than in the torrid
      zone, and the cold less than in the frigid zones.
      [1913 Webster]

   Syn: Abstemious; sober; calm; cool; sedate.
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The Collaborative International Dictionary of English v.0.48:

Temperate \Tem"per*ate\, v. t.
   To render temperate; to moderate; to soften; to temper.
   [Obs.]
   [1913 Webster]

         It inflames temperance, and temperates wrath.
                                                  --Marston.
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WordNet (r) 3.0 (2006):

temperate
    adj 1: (of weather or climate) free from extremes; mild; or
           characteristic of such weather or climate; "a temperate
           region"; "the temperate zones"; "temperate plants" [ant:
           intemperate]
    2: not extreme in behavior; "temperate in his habits"; "a
       temperate response to an insult"; "temperate in his eating
       and drinking" [ant: intemperate]
    3: not extreme; "a moderate penalty"; "temperate in his response
       to criticism" [syn: moderate, temperate]

Moby Thesaurus II by Grady Ward, 1.0:

109 Moby Thesaurus words for "temperate":
   abstemious, abstentious, abstinent, aestival, ascetic, austere,
   bland, blood-hot, blood-warm, bracing, calid, calm, celibate,
   chaste, checked, chill, chilly, cold sober, composed, constant,
   continent, controlled, cool, coolish, curbed, disciplined,
   discreet, dispassionate, equable, equatorial, even, even-tempered,
   forbearing, fresh, frugal, genial, gentle, grave, imperturbable,
   indulgent, invigorating, judicious, luke, lukewarm, measured, mild,
   mild as milk, moderate, modest, nonviolent, pacifistic, peaceable,
   peaceful, prudent, puritanical, quiet, rational, reasonable,
   regulated, restrained, room-temperature, sane, sedate,
   self-denying, self-indulgent, self-possessed, self-restrained,
   sensible, serene, serious, sober, sober-minded, sobersided, soft,
   solemn, sparing, stable, staid, steady, stimulating, stinting,
   subtropical, summery, sunny, sunshiny, tame, teetotal, tepid,
   thermal, thermic, toasty, tranquil, tropical, undrunk, undrunken,
   unexcessive, unexcited, unextreme, unfrozen, unimpassioned,
   uninebriate, uninebrious, unintoxicated, unperturbed, unruffled,
   untipsy, warm, warm as toast, warmish