Nimbus clouds are associated with rain. They are dark, gray, and often produce precipitation.

Here's a breakdown:

* Nimbus means "rain cloud" in Latin.

* Nimbostratus clouds are thick, dark, gray layers of clouds that cover the entire sky and bring steady, prolonged rain.

* Cumulonimbus clouds are towering, thunderhead clouds that produce heavy rain, hail, strong winds, and sometimes tornadoes.

So, if you see a nimbus cloud, you can expect some form of precipitation, whether it's light drizzle or a heavy downpour.