Un acquazzone improvviso e un caffè al bar

What does “piove a dirotto” mean in Italian?

Piove a dirotto is how Italians say “it’s pouring”: the rain is coming down hard and unchecked, in torrents. Dirotto carries the sense of “unrestrained,” so the image is of rain with the brakes off rather than the English cats and dogs. It is the natural line to reach for when a sudden acquazzone (downpour) sends you ducking into a bar — non posso uscire, piove a dirotto.

Italian is rich in rain idioms built on piovere a + a noun: piove a catinelle (“it rains by basinfuls”), the most common everyday version, and piove a secchiate (“by the bucketful”). They all mean a heavy downpour; a dirotto leans a little more dramatic and is just as common in speech. A sudden short burst itself is un acquazzone.