1.
hot and humid; high temperature and high humidity
Describes weather or climate conditions characterized by both high temperatures and high humidity levels.
日本の夏は高温多湿だ。
Japanese summers are hot and humid.
高温多湿の環境ではカビが生えやすい。
Mold grows easily in hot and humid environments.
高温多湿の場所を避けて保管してください。
Please store in a place away from high heat and humidity.
高温多湿な気候のせいで、熱中症に注意が必要だ。
Because of the hot and humid climate, it's necessary to watch out for heatstroke.
A four-character compound: 高温 (high temperature) + 多湿 (high humidity). Extremely common when describing Japan's summer climate and frequently seen on product labels, weather forecasts, and storage instructions.
COMMON COLLOCATIONS:
- 高温多湿の環境 — hot and humid environment
- 高温多湿な気候 — hot and humid climate
- 高温多湿を避ける — to avoid heat and humidity
- 高温多湿の場所 — hot and humid location
USAGE:
Very commonly seen on food packaging and product labels as a storage warning: 高温多湿を避けて保存してください (store away from heat and humidity). Functions as a noun but can modify nouns with の or な.
RELATED TERMS:
- 高温 — high temperature
- 多湿 — high humidity
- 蒸し暑い — muggy, sultry (describes the feeling rather than the condition)
- 低温乾燥 — low temperature and dry (the opposite condition)