Source : Webster's Revised Unabridged Dictionary (1913)

Temperateness \Tem"per*ate*ness\, n.
   The quality or state of being temperate; moderateness;
   temperance.

Source : WordNet®

temperateness
     n 1: moderate weather; suitable for outdoor activities [syn: {fair
          weather}, {sunshine}]
     2: exhibiting restraint imposed on the self; "an effective
        temperateness in debate" [syn: {self-restraint}]