How to say "humidity" in Japanese

• 湿度しつどJLPT N2approx.Common
  nounThe word for humidity as a measurable property of the air, as in weather reports; use it when saying humidity is high or low.
  ニューヨークの天候てんこうは、夏なつは暑あつく湿度しつども高たかい。↗

  New York weather is hot and humid in the summer.
• 湿気しっけJLPT N2approx.Common
  nounDampness or humidity in the air around you — a muggy day, a damp room or climate; the felt, often unwelcome dampness rather than a measured figure.
  夏なつはとても湿気しっけが多おおいんです。↗

  In the summer, it's very humid.
• 湿りしめりCommon
  nounDampness or moisture, the state of something having become damp; only marginally a way to say 'humidity' — for the moisture content of the air, 湿度 or 湿気 are the words to reach for.
• 水分すいぶんJLPT N2approx.Common
  nounWater or moisture contained in something, as in food or the body; it is not the word for humidity in the air — for that, use 湿度 or 湿気.
  水分すいぶんをたくさん取とってください。↗

  You should drink a lot of liquid.

Use 湿度 for humidity as a measurable property of the air, 湿気 for the dampness you feel in a room or the weather, and reserve 「湿り」 and 水分 for dampness or moisture in things rather than the air.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 湿度しつどhumidity
• 湿気しっけmoisture
• 湿りしめりdampness
• 水分すいぶんwater
• 湿しつmoisture