Sri Jayewardenepura Kotte Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Sri Jayewardenepura Kotte, Colombo District, Sri Lanka. This average is based on long-term data collected between 1990 and 2020. Now, let's explore all the details to give you a full picture.

Sri Jayewardenepura Kotte is known for its substantial rainfall, with annual precipitation reaching 2658 mm (105 in).

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, October receives substantial rainfall, averaging 360 mm (14 in) of precipitation, recorded across 16 rainy days.

In contrast, the driest month, January brings less rainfall, with 74 mm (2.9 in) over 5 rainy days.

October, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 202 hours of sunshine in this period. During the driest month January you can expect a temperature of 32°C (90°F). For more detailed insights into the city's temperatures, visit our Sri Jayewardenepura Kotte Temperature page.

Sri Jayewardenepura Kotte's average annual precipitation is 2658 mm (105 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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 Sri Jayewardenepura Kotte:

• 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.

• 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 Sri Jayewardenepura Kotte's weather, including sunshine hours, humidity levels, and temperature data, visit our Sri Jayewardenepura Kotte Climate page.