Top 10 Countries With Highest Rainfall In The Year: Colombia, Panama, Malaysia And More

Top 10 Countries With Highest Rainfall: As we know, rainfall is significant for life on Earth. Some countries receive significantly more rain than others due to their location, weather patterns and natural geography. Usually found close to the equator or encircled by oceans, these nations receive a lot of moisture and rain frequently. The top 10 nations with the highest annual rainfall in 2025 are Papua New Guinea, Malaysia, Colombia and Panama. These regions are well-known for their high humidity, thick forests, and tropical climates.

Rainfall helps maintain river and lake water levels in addition to sustaining agriculture and a rich biodiversity. However, floods and other issues can occasionally result from excessive rainfall. With more than 3,000 mm of annual precipitation, nations like Colombia and São Tomé and Príncipe are at the top of the list. The top 10 rainiest nations in the world will be examined in this article, along with the reasons behind their high rainfall. We will also investigate the impact it has on the local environment and life.

Top 10 Countries With the Highest Rainfall In The World And The Reasons

Here are the top 10 countries with the highest annual rainfall and the reasons behind their wet climates:

Rank	Country	Annual rainfall (in mm/millimetres)
1.	Colombia	3240 mm
2.	Sao Tome & Príncipe	3200 mm
3.	Papua New Guinea	3142 mm
4.	Soloman	3028 mm
5.	Panama	2928 mm
6.	Costa Rica	2926 mm
7.	Samoa	2880 mm
8.	Malaysia	2875 mm
9.	Brunei	2722  mm
10.	Indonesia	2702 mm

Source: worldbank.Org

1. Colombia – 3,240 mm/year

Top 10 countries with the highest rainfall (Image: Canva)

A country in South America, Colombia's high rainfall is due to its location near the equator and the influence of the Intertropical Convergence Zone (ITCZ), which brings frequent rainstorms. The country's diverse topography, including the Andes Mountains, also contributes to varying rainfall patterns across regions.

2. São Tomé and Príncipe – 3,200 mm/year

This island nation in central Africa experiences heavy rainfall because of moist southwesterly winds that are intercepted by central mountains, leading to significant precipitation. 

3. Papua New Guinea – 3,142 mm/year

Situated in the tropical Pacific, Papua New Guinea receives abundant rainfall due to its mountainous terrain and proximity to warm ocean currents, which enhance moisture-laden winds and precipitation. 

4. Solomon Islands – 3,028 mm/year

The Solomon Islands, a country in oceanic high rainfall, is influenced by moisture-bearing winds that have travelled over the ocean, leading to heavy precipitation, especially during the southeasterly season. 

5. Panama – 2,928 mm/year

Top 10 countries with the highest rainfall (Image: Canva)

A country in Central America, Panama's significant rainfall is attributed to its tropical climate and the convergence of moist air masses, which result in frequent and intense rainstorms, particularly during the rainy season.

6. Costa Rica – 2,926 mm/year

Costa Rica, again a country in Central America, experiences heavy rainfall due to its position between the Pacific Ocean and the Caribbean Sea, with mountainous regions that enhance orographic precipitation. 

7. Samoa – 2,880 mm/year

A country in Oceania, Samoa's high rainfall is caused by the rising of warm, moist air over the ocean where winds converge, leading to thunderstorm activity, especially during the wet season. 

8. Malaysia – 2,875 mm/year

Asian country Malaysia's equatorial climate and monsoon seasons bring heavy rainfall, particularly from the northeast monsoon, which affects the eastern regions with intense precipitation. 

9. Brunei – 2,722 mm/year

Top 10 countries with the highest rainfall (Image: Canva)

Another Asian country, Brunei, experiences substantial rainfall due to its tropical climate and the influence of monsoonal winds, which bring moist air and frequent rain showers throughout the year.

10. Indonesia – 2,702 mm/year

Indonesia's high rainfall is a result of its tropical rainforest climate, with consistent warm temperatures and high humidity, leading to frequent and heavy rainfall across the archipelago. 

 

 

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