Introduction
The rainiest places on Earth are found where moisture-laden winds are forced upward by mountains (orographic rainfall) or where monsoon systems deliver relentless precipitation.
India's Meghalaya state dominates rainfall records, but cities across the tropics also see extraordinary precipitation.
1. Mawsynram, India
- Annual Rainfall: 11,871 mm (467 in)
- Location: Meghalaya, India
- Population: ~7,000
Mawsynram holds the Guinness World Record for the wettest place on Earth by average annual rainfall. The monsoon winds from the Bay of Bengal are forced upward by the Khasi Hills, dumping extraordinary amounts of rain.
Locals have developed unique "knup" umbrellas made from bamboo and banana leaves to cope with the constant downpour.
2. Cherrapunji, India
- Annual Rainfall: 11,777 mm (464 in)
- Record Year: 26,471 mm (1861)
- Population: ~11,000
Cherrapunji holds the record for the most rainfall in a single year (26,471 mm in 1861). It sits just 16 km from Mawsynram and receives nearly the same amount.
Ironically, Cherrapunji faces water shortages in the dry season because the steep terrain causes water to run off quickly.
3. Tutunendo, Colombia
- Annual Rainfall: 11,394 mm (449 in)
- Location: Choco, Colombia
- Climate: Tropical rainforest
Tutunendo in Colombia's Choco region is one of the wettest places in the Western Hemisphere. The Pacific moisture hits the Andes and dumps massive rainfall.
The Choco region has some of the highest biodiversity on Earth, directly linked to its extraordinary rainfall.
4. Buenaventura, Colombia
- Annual Rainfall: 6,988 mm (275 in)
- Population: ~400,000
- Location: Pacific coast
Buenaventura is Colombia's main Pacific port despite being one of the rainiest cities in the world. Heavy rainfall creates constant challenges for infrastructure and transportation.
The city is surrounded by some of the last remaining lowland tropical rainforests in the Pacific Americas.
5. Quibdo, Colombia
- Annual Rainfall: 8,989 mm (354 in)
- Population: ~115,000
- Location: Choco, Colombia
Quibdo is the wettest city in the world with a population over 100,000. It rains over 300 days per year, with torrential downpours the norm.
Despite the abundant water, the city faces paradoxical water supply challenges due to infrastructure limitations.
6. Monrovia, Liberia
- Annual Rainfall: 5,131 mm (202 in)
- Population: ~1.5 million
- Notable: Wettest national capital in Africa
Monrovia is the wettest capital city in Africa. The rainy season from May to October brings near-constant precipitation.
Flooding is a major challenge, with entire neighborhoods becoming inaccessible during peak rains.
7. Hilo, Hawaii, USA
- Annual Rainfall: 3,277 mm (129 in)
- Population: ~46,000
- Location: Big Island, Hawaii
Hilo is the wettest city in the United States. Trade winds push moisture against the slopes of Mauna Kea, creating persistent rainfall.
Despite the rain, Hilo is a popular tourist destination with lush tropical gardens and proximity to Hawaii Volcanoes National Park.
8. Douala, Cameroon
- Annual Rainfall: 3,848 mm (152 in)
- Population: ~2.5 million
- Location: Gulf of Guinea coast
Douala is the wettest major city in Africa. Its location on the Gulf of Guinea coast exposes it to moisture-laden Atlantic winds.
The city faces serious flooding problems, with climate change expected to increase rainfall intensity.
9. Bergen, Norway
- Annual Rainfall: 2,250 mm (89 in)
- Rainy Days: ~270 per year
- Population: ~280,000
Bergen is the rainiest city in Europe. Surrounded by seven mountains that trap Atlantic moisture, the city averages 270 rainy days per year.
Despite the rain, Bergen is consistently ranked as one of the most livable cities in Norway.
10. Debundscha, Cameroon
- Annual Rainfall: 10,299 mm (405 in)
- Location: Mount Cameroon base
- Population: Small village
Debundscha sits at the base of Mount Cameroon and receives rain from Atlantic moisture forced up the volcanic slopes. It is Africa's wettest settlement.
The village is so wet that moss grows on virtually every surface, including buildings and roads.
Key Facts
- Mawsynram receives about 12 meters of rain per year, enough to submerge a four-story building.
- Cherrapunji once received 26,471 mm in a single year (1861), the highest annual total ever recorded.
- Most of the world's wettest places are where ocean moisture meets mountains (orographic rainfall).
- India's Meghalaya state has developed unique root bridges grown from living tree roots to withstand constant moisture.
- The tropics receive the most rainfall overall, but some temperate areas like Bergen, Norway also rank highly.
Fun Facts
- Cherrapunji has living root bridges made from fig tree roots that can support the weight of 50 people and last for centuries.
- Despite being the wettest place on Earth, Mawsynram faces water shortages during the dry season.
- Bergen residents joke that "there's no bad weather, only bad clothing."
- Quibdo receives more rainfall than any other city with over 100,000 people.
Final Thoughts
The rainiest cities showcase Earth's water cycle at its most extreme. While the deluge creates challenges for infrastructure and daily life, it also sustains some of the most biodiverse ecosystems on the planet.
