The rain on Noah lasted 40 days and 40 nights according to Genesis 7:12. Some Bible passages also say the floodwaters kept prevailing for 150 days , which refers to the wider flooding period, not just the rain itself.

Quick Scoop

  • Rain duration: 40 days and 40 nights.
  • Floodwaters duration: 150 days of waters prevailing.
  • Why the difference: one describes the rainfall, the other the overall flood stage.

Simple wording

If someone asks, “How long did it rain on Noah?” the short answer is: 40 days and 40 nights. If they mean the full flood event, that lasted much longer.

Tiny timeline

  1. Rain begins.
  2. Rain continues for 40 days and 40 nights.
  1. Waters remain over the earth for 150 days.

So for the rain itself , the answer is 40 days and 40 nights.