According to the Book of Genesis, how many days did rain fall during the Flood in Noah’s Ark’s story?

According to the Book of Genesis, rain fell for 40 days and 40 nights during the Flood in Noah’s Ark’s story.

Genesis says that the Flood began after Noah, his family, and the animals entered the Ark. Rain then fell continuously for forty days and forty nights, while the waters rose over the earth. This period describes the rainfall itself, not the entire duration of the Flood.

A common mix-up is confusing forty days of rain with the much longer period during which the waters remained high. Genesis later says that the waters prevailed for 150 days. The account also describes a later period of waiting before the ground became dry enough for Noah and the animals to leave.

The number forty has wider biblical significance, appearing in other stories involving testing, travel, or preparation. In the Ark narrative, however, the specific phrase refers to the duration of the rain, not to the total time Noah spent aboard the vessel.