Precipitation is not only defined by intensity (light, moderate or heavy) or phase (liquid, snow, hail, etc.) but also by the type of cloud that produces it. The classification "rain and showers of rain" specifically reflects the origin of the precipitation with respect to cloud type.

• Rain (also referred to as continuous or steady rain) is typically associated with layer clouds, especially nimbostratus. These clouds form in stable atmospheric conditions and produce widespread, persistent precipitation over longer periods and larger areas. This type is common with warm fronts or within the warm sector of a frontal system.

• Showers of rain, on the other hand, originate from convective clouds, such as cumulus congestus or cumulonimbus. These clouds develop in unstable conditions and produce intermittent, often intense bursts of precipitation over smaller areas. Showers can start and stop quickly and may vary significantly in intensity. They are typical of cold fronts, air mass instability, or convective activity.