不快指数(ふかいしすう)

ふかいしすう
noun
discomfort index; temperature-humidity index
weatherscience
1. discomfort index; temperature-humidity index
A numerical index that combines temperature and humidity to express how uncomfortable the weather feels. Commonly referenced in Japanese weather forecasts during summer months.
今日(きょう)の不快指数(ふかいしすう)は80を超(こ)えている。
Today's discomfort index exceeds 80.
不快指数(ふかいしすう)が高(たか)いと熱中症(ねっちゅうしょう)のリスクも上(あ)がる。
When the discomfort index is high, the risk of heatstroke also increases.
梅雨(つゆ)の時期(じき)は湿度(しつど)が高(たか)くて不快指数(ふかいしすう)が上(あ)がりやすいので、エアコンを使(つか)う人(ひと)が多(おお)い。
During the rainy season, humidity is high and the discomfort index tends to rise, so many people use air conditioning.

Usage

Frequently used in weather forecasts and news reports during Japan's hot and humid summer months. A discomfort index above 75 is considered uncomfortable, and above 80 is very uncomfortable. The index is calculated from temperature and relative humidity.

Common collocations

general
Added 2026.3.15 16:20 · Revised 2026.9.2 13:01
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