気温（きおん、kion）
- temperature

The word 気温 (気温) means "temperature." Specifically, it refers to the degree of hotness or coldness of the air. It’s a measure of how warm or cool the environment is at a particular place and time.

⚫︎ 今日の気温は30度です。 Translation: The temperature today is 30 degrees. ⚫︎ 気温が下がり、寒くなってきましたね。 Translation: The temperature has dropped, and it's getting cold. ⚫︎ 気温の変化に注意してください。 Translation: Please pay attention to the changes in temperature.

⚫︎ You can use 気温 in everyday conversation to discuss the weather, in weather reports, or when talking about how you feel in relation to the temperature. ⚫︎ It’s suitable for formal and informal contexts. ⚫︎ It's often used with the degree symbol ("度", "do") to specify a numerical value.

⚫︎ The word 気温 is typically written with the kanji 気温. ⚫︎ The reading is きおん (hiragana). ⚫︎ There are no common variations in the writing or the okurigana.

⚫︎ There are no direct synonyms in Japanese, as 気温 has a specific meaning. ⚫︎ While not direct synonyms, phrases that relate to weather such as 暑さ (atsusa, heat), 寒さ (samusa, coldness), or 暖かさ (atatakasa, warmth) may be used to discuss aspects related to the 気温.

⚫︎ There is no direct antonym, however, a sense of an opposite concept can be represented by the concepts of "cold" or "heat."

東京の今日の気温は最高28度、最低18度です。 ・Translation: The temperature in Tokyo today is a high of 28 degrees and a low of 18 degrees. ・Explanation: This sentence provides the high and low 気温 for Tokyo for the day.

夏は気温が高く、冬は低くなります。 ・Translation: The temperature is high in summer and low in winter. ・Explanation: This sentence describes the seasonal changes in 気温.

The word 気温 is a compound word: ⚫︎ 気 (ki): meaning "air" or "atmosphere." ⚫︎ 温 (on): meaning "warmth" or "temperature." Thus, 気温 literally means "air temperature."