Cherrapunji receives an annual rainfall of 1,270 cms. Here it rains so much for two reasons – Elevation: because of the elevation, air that blows over the plains below is cooled as it rises to the higher elevation. This cooling of the air causes moisture trapped in the air to condense, forming clouds, which then release rain. Monsoons: the prevailing winds are very heavily laden with moisture. The constant supply of moist air for six months straight results in almost continual rainfall.
Records indicate more annual rainfall in the town of Mawsynram, located in the Kashi hills in Meghalya, than Cherrapunji – although disputes about data accuracy have been rife as both regions fight for rainfall supremacy. A quick drive from Cherrapunji, Mawsynram appears to have a more favorable position in terms of proximity to the Bay of Bengal and steep incline of the Kashi Hills, which allows humid, moist air to ascend and in turn, blanket the area with rain.
Although the country of Bosnia and Herzegovina is devoid of coastline, save for a scant shore of the Adriatic, it nonetheless receives a fair amount of rainfall each year, most notably in Crkvica. The town in Bosnia, just northwest of Sarajevo, consistently receives what is considered to be the highest annual average precipitation in Europe.
Cameroon has a reputation for being one of the most exotic and beautiful nations in Africa. It encompasses the principal features of the continent on a small scale. As a result, parts of Cameroon receive super heavy rainfall. Ocean coastline, tropical forests, grasslands, deserts and mountains within close proximity to each other dominates its landscape. At the base of Mount Cameroon and within plain view of the Bight of Biafra, the city of Debundscha receives over 400 inches of rain a year.
Although not exactly a residential area, the region around Mount Waialeale and indeed the summit, receives a ton of precipitation on a habitual basis. Tourism officials in Hawaii love to boast that this is the wettest place on the planet. The rainfall in Kauai is notable for the fact that it occurs with such daily regularity. Mount Waialeale bears the brunt of the precipitation because of a conical shape and pure geographical position relative to the ocean and trade winds.