YOU SAID:
it is a very hot and stuffy day
INTO JAPANESE
とても暑くて蒸れた日です
BACK INTO ENGLISH
It ’s a very hot and humid day
INTO JAPANESE
とても蒸し暑い日です
BACK INTO ENGLISH
It's a very sultry day
INTO JAPANESE
とても蒸し暑い日です
BACK INTO ENGLISH
It's a very sultry day
That didn't even make that much sense in English.