Question: what are types of precipitation?
Answer: Rain. Most commonly observed, drops larger than drizzle (0.02 inch / 0.5 mm or more) are considered rain. ... 
Drizzle. Fairly uniform precipitation composed exclusively of fine drops very close together. ... 
Ice Pellets (Sleet) ... 
Hail. ... 
Small Hail (Snow Pellets) ... 
Snow. ... 
Snow Grains. ... 
Ice Crystals.