What does 気温 mean?
気温 is a Japanese noun meaning “temperature (weather - not used for things)” in English. It is written as 気温 in kanji, きおん in hiragana, and kion in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
気温が下がると関節が痛むんだ。
My joints ache when it gets cold.