The five wettest places on earth that are occupied by humans, based upon average annual rainfall.
Wettest Places on Earth
1. Lloro, Columbia- 523.6" of rainfall per year
The city of Lloro in the western part of Columbia in South America receives an annual average rainfall of 523.6" of rain per year. That makes Lloro, Columbia the wettest place on earth.
2. Mawsynram, India- 467.4"
The village of Mawsynram in eastern India is the second wettest place on earth with an average annual rainfall of 467.4". Mawsynram receives plentiful rainfall every year from weather systems moving up the Bay of Bengal in the Indian Ocean, especially during the monsoon season.
3. Mount Waialeale, Kauai- 460"
Image Source (Waialeale Lake on top of Mount Waialeale on Kauai, Hawaii)
Mount Waialeale is a 5,148 foot mountain located in the center of the island of Kauai in Hawaii that receives an average annual rainfall of 460" per year. The abundant rain that falls on top of Mount Waialeale falls off of the mountain in a long series of waterfalls collectively known as the Weeping Wall. The Weeping Wall waterfalls is a very popular tourist attraction on Kauai, and in Hawaii. Unless you are an intrepid hiker, you have to take a helicopter ride to see the Weeping Wall.
4. Cherrapunji, India- 425"
The town of Cherrapunji, also spelled Cherrapungee, in eastern India receives 425" of rainfall annually, which makes it the fourth wettest place on earth. Cherrapunji is located only about 10 miles southeast of Mawsynram, and also receives its abundant rainfall from weather systems that move up, and pick up moisture from the Bay of Bengal.
5. Debundscha, Cameroon- 405"
Image Source by Normand Roy (Mount Cameroon near Debundscha in Cameroon in Africa)
The village of Debundscha in southwest Cameroon in Africa receives 405" of annual rain, making it the fifth wettest place on earth. Located at the base of 13,255 foot high Mount Cameroon, Debundscha lies just inland from the Atlantic Ocean at the Bight of Bonny. The village, no doubt, receives its abundant moisture right off the Atlantic Ocean, with Mount Cameroon blocking storm systems from moving inland. As the storm systems get stuck on Mount Cameroon, they drop their moisture on Debundscha.
For more see Tallest Mountains in North America