(n.) A fall or descent of rain; the water, or amount of water, that falls in rain; as, the average annual rainfall of a region.

Scotch mist blood rain bogginess damp dampness dewiness drizzle evening mist exudation fall flurry fogginess gout of rain humectation humor marshiness mist mistiness misty rain mizzle moistiness moistness moisture patter pitter-patter precipitation rain raindrop raininess rainwater sheet of rain shower showeriness soddenness sogginess soppiness splatter sprinkle swampiness unfrozen hydrometeor wateriness wet wetness wettishness