Translation guide
In Japanese, 'hot and humid' is most commonly expressed with the word 蒸し暑い (mushiatsui), which specifically describes the uncomfortable combination of heat and high humidity typical of Japanese summers. Other expressions exist for different nuances, such as extreme heat and humidity or a more general sense of sultriness.
Describe weather that is both hot and humid, causing discomfort and stickiness.
The most common and natural word for 'hot and humid'. It combines 蒸す (to steam) and 暑い (hot), evoking the feeling of being steamed. Used for typical Japanese summer weather.
今日は蒸し暑いですね。
It's hot and humid today, isn't it?
蒸し暑い夜はなかなか寝付けない。
On hot and humid nights, I can't fall asleep easily.
Describes an oppressively hot and stuffy feeling, often indoors or in crowded places. It implies discomfort from heat and lack of ventilation, not necessarily high humidity.
この部屋は暑苦しいから窓を開けよう。
This room is hot and stuffy, so let's open the window.
A more literal phrase meaning 'the humidity is high and it's hot'. Useful when you want to emphasize the humidity factor explicitly.
今日は湿度が高くて暑い。
Today it's humid and hot.
A colloquial, onomatopoeic verb phrase describing a muggy, steamy atmosphere. Often used in casual speech.
外は蒸し蒸ししてるね。
It's all muggy outside, huh?
Describe intense, often tropical heat with high humidity, sometimes with a sense of being overwhelmed.
Still the go-to word, but can be intensified with adverbs like とても (very) or すごく (extremely).
今日はすごく蒸し暑い。
It's extremely hot and humid today.
A formal or written term for 'intense heat', often used in weather reports. It implies severe heat, which in Japan is usually accompanied by humidity.
Literally 'tropical night', referring to nights when the temperature doesn't drop below 25°C (77°F). It implies hot and humid conditions that make sleeping difficult.
Describe a heavy, still, and sultry atmosphere, often before a storm or in a confined space.
Works for sultry weather as well, especially when the air feels thick and still.
雨が降る前は蒸し暑くなる。
It gets hot and humid before it rains.
Describes a sudden feeling of stuffiness, heat, or oppressive air, often indoors or in a crowd. Can also mean to be offended, but context clarifies.
部屋に入ったらむっとした。
When I entered the room, it felt hot and stuffy.
蒸し暑い focuses on humidity combined with heat, typical of outdoor summer weather. 暑苦しい focuses on a stuffy, oppressive feeling, often indoors or in crowded places, and doesn't necessarily imply high humidity.
外は蒸し暑いが、屋内は暑苦しい。
Outside it's hot and humid, but indoors it's hot and stuffy.
The literal translation '暑くて湿気がある' is grammatically correct but sounds unnatural and wordy. Use 蒸し暑い instead.
This summer, intense heat continues.
昨夜は熱帯夜で寝苦しかった。
Last night was a tropical night and it was hard to sleep.
Means 'unpleasantly warm' or 'lukewarm', often implying humidity and a clammy feeling. Used for air, wind, or objects.
生暖かい風が吹いている。
A warm, humid wind is blowing.