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.
今日の不快指数は80を超えている。
Today's discomfort index exceeds 80.
不快指数が高いと熱中症のリスクも上がる。
When the discomfort index is high, the risk of heatstroke also increases.
梅雨の時期は湿度が高くて不快指数が上がりやすいので、エアコンを使う人が多い。
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:
- 不快指数が高い (the discomfort index is high)
- 不快指数が上がる (the discomfort index rises)
- 不快指数80以上 (discomfort index of 80 or above)