毛毛雨是一个气象用语，是指分布稠密均匀的微细液态降水，雨滴直径小于0.5毫米，雨量低于0.1毫米。毛毛雨是由高度较低的层云和层积云所产生的。

• 雾
• 薄雾
• 雨

Drizzle is a light liquid precipitation consisting of liquid water drops smaller than those of rain – generally smaller than 0.5 mm (0.02 in) in diameter. Drizzle is normally produced by low stratiform clouds and stratocumulus clouds. Precipitation rates from drizzle are on the order of a millimetre per day or less at the ground. Owing to the small size of drizzle drops, under many circumstances drizzle largely evaporates before reaching the surface and so may be undetected by observers on the ground. The METAR code for drizzle is DZ.