You must learn to govern your temper.
- Tu dois apprendre à contrôler ton humeur.
He was, which was rare for him, in a bad temper.
- Il était, ce qui est rare chez lui, de mauvaise humeur.
He is rarely in a good mood.
- Il est rarement de bonne humeur.
His answer depends on his mood.
- Sa réponse dépend de son humeur.