According to Genesis, how long was Noah's Ark exposed to rain during the Flood?

According to Genesis, Noah's Ark was exposed to rain for forty days and forty nights during the Flood.

The number appears in the biblical Flood narrative in Genesis. After Noah, his family, and the animals entered the Ark, rain fell continuously for forty days and forty nights. The text then describes the waters prevailing over the earth for a longer period, so the forty-day rainfall is not the same as the entire duration of the Flood.

Forty is a recurring symbolic period in the Bible. Other biblical episodes also use forty days or years to mark testing, preparation, or transition, including Moses' time on Mount Sinai and Israel's wilderness journey. The Genesis account separately describes the waters gradually receding after the rain stopped.

The phrase is often shortened in everyday speech to “forty days,” but the traditional wording is “forty days and forty nights.”