World distribution of precipitation UPSC | Climatology| Physical Geography ~ Civil Services Self Study

The distribution of rainfall in the world is highly variable however some generalizations can be done based on the cause of rainfall:

Rainfall is maximum at the equator due to conventional current formation and convergence of trade winds from both hemispheres.
Heavy rainfall in the area where air converge
Low rainfall in the area where air divergence
The shifting of moist air mass causes heavy rainfall in the coastal area for example monsoon; in the winter Mediterranean zone receives higher rainfall.
Higher rainfall where warm ocean current formed and low rainfall where cold current flow.

The following are the distribution of precipitation in the world:
High rainfall areas( over 200 cm):

Equatorial region of Africa, South America, and Southeast Asia.
Eastern margin of the continent between 10 to 30-degree latitude; monsoonal, and Caribbean areas.
The western margin of the continent is between 40 to 60 decree latitude: due to westerlies

Moderate rainfall;( 100 to 200 Cm)

Subtropical areas: East China, eastern Brazil, southeast Asia, the interior part of India.

Low rainfall areas;

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