If you are temperamental, you tend to become easily upset and experience unpredictable mood swings.
If you show temperance, you limit yourself so that you don’t do too much of something; you act in a controlled and well-balanced way.
(of weather or climate) not mild
play around with or alter or falsify, usually secretively or dishonestly
your usual mood
(of weather or climate) free from extremes
the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
made hard or flexible or resilient especially by heat treatment
moderating by making more temperate
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