Bentota Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Bentota, Galle District, Sri Lanka. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's explore all the details to give you a full picture.
Bentota is known for its substantial rainfall, with annual precipitation reaching 2873 mm (113 in).
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Bentota shows significant variation throughout the year. Expect 351 mm (14 in) of precipitation during the wettest month October, distributed over 15 rainy days.
In contrast, February offers drier and sunnier days, with around 76 mm (3 in) of rainfall over 5 rainy days.
October, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 200 hours of sunshine in this period. During the driest month February you can expect a temperature of 30°C (86°F). For more detailed insights into the city's temperatures, visit our Bentota Temperature page.
Daily Historical Precipitation
37-year average (1980-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Bentota's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Bentota spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Sri Lanka: City Comparison
The map below shows the annual precipitation across Sri Lanka. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Bentota vs World: Rainfall Compared
Bentota's average annual precipitation is 2873 mm (113 in). Let's compare this to some popular worldwide tourist destinations:
New York City, USA, receives 1276 mm (50 in) of rainfall annually, with precipitation evenly distributed throughout the year.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Climate change is affecting precipitation patterns worldwide, including Bentota:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Bentota's weather, including sunshine hours, humidity levels, and temperature data, visit our Bentota Climate page.
