Trincomalee Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Trincomalee, Trincomalee District, Sri Lanka. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's break down all the details for a clearer picture.
Trincomalee is known for its substantial rainfall, with annual precipitation reaching 1325 mm (52 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Trincomalee shows significant variation throughout the year. Expect 317 mm (12 in) of precipitation during the wettest month November, distributed over 16 rainy days.
In contrast, June offers drier and sunnier days, with around 20 mm (0.8 in) of rainfall over 2 rainy days.
November, the wettest month, has a maximum daytime temperature of 29°C (84°F). The city receives 168 hours of sunshine in this period. During the driest month June you can expect a temperature of 34°C (93°F). For more detailed insights into the city's temperatures, visit our Trincomalee Temperature page.
Daily Historical Precipitation
36-year average (1980-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Trincomalee's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Trincomalee 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
Trincomalee vs World: Rainfall Compared
Trincomalee's average annual precipitation is 1325 mm (52 in). Let's compare this to some popular worldwide tourist destinations:
The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
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.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Trincomalee's weather, including sunshine hours, humidity levels, and temperature data, visit our Trincomalee Climate page.
