Clouds. But technically it is falling from the sky, from clouds in the sky.
there are clouds that cover the sky
Snow
They eventually come down as rain,snow,etc. They don't fall right away because they are made of very small droplets of water, which fall through the air very slowly.
Condensation of the water vapor in clouds creates precipitation, which includes rain, snow, and various forms of frozen water that fall from the sky, returning water to the environment. In some cases, surface clouds (fog) can condense directly to provide liquid water.
Clouds just collect water, they precipitate (rain) when there is a large amount of water in the clouds, so the clouds that you don't see rain are clouds that have collected water but not enough to precipitate.
there are clouds that cover the sky
from the sky
Any
Cirrus clouds are high enough to be at a low enough temperature for the water droplets to form into ice crystals. However, Cirrus clouds are not precipitation clouds, so no snow or rain can fall from them. The clouds that can cause snow to fall in the right conditions are Nimbostratus and Cumulonimbus clouds.
Precipitation
It forms clouds in the sky and then, when the clouds are heavy enough, they fall as rain
thick stratus clouds blanketing the sky
Snow
snow or hail
The ice crystals that fall from the sky are called snow or snowflakes.
rain: the clouds collect eough water from the ocean to the clouds and the clouds get too heavy and have to fall down. hail: the water from the clouds get frozen and turn into snow
A dark rain cloud is called a nimbus. These clouds produce rain and snow as they are filled with compact and frozen moisture.