蒸むし暑あつさ

noun

heat and humidity; humid heat

Refers to the uncomfortable combination of high temperature and high humidity, typical of Japanese summers.

• 今年ことしの夏なつは特とくに蒸むし暑あつさが厳きびしい。

  The heat and humidity are especially severe this summer.

• 蒸むし暑あつさで夜よるも寝ね苦ぐるしい。

  The humid heat makes it hard to sleep even at night.