猛暑日(もうしょび)

もうしょび
noun
extremely hot day (over 35°C)
1. extremely hot day (over 35°C)
A weather term used in Japan for days when the maximum temperature reaches 35°C (95°F) or higher.
今日(きょう)は猛暑日(もうしょび)になる予報(よほう)だ。
The forecast says today will be an extremely hot day.
今年(ことし)の夏(なつ)は猛暑日(もうしょび)が多(おお)かった。
This summer had many extremely hot days.
猛暑日(もうしょび)は熱中症(ねっちゅうしょう)に注意(ちゅうい)が必要(ひつよう)だ。
On extremely hot days, you need to be careful of heatstroke.

猛暑日(もうしょび) is an official Japan Meteorological Agency term.

TEMPERATURE SCALE IN JAPAN:

  • 夏日(なつび): over 25°C
  • 真夏日(まなつび): over 30°C
  • 猛暑日(もうしょび): over 35°C
  • 酷暑日(こくしょび): over 40°C (newer term)

USAGE NOTE:
猛暑日(もうしょび) is frequently used in weather forecasts and news during summer. Often paired with warnings about 熱中症(ねっちゅうしょう) (heatstroke).

general
Added 2026.2.3 11:36
09500/09622_moushobi