Bollegala Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Bollegala, 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.

Bollegala has a notably wet climate with abundant precipitation, recording 2654 mm (104 in) of rainfall per year.

Monthly Precipitation Levels

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

The climate in Bollegala shows significant variation throughout the year. Expect 362 mm (14 in) of precipitation during the wettest month October, distributed over 16 rainy days.

In contrast, January offers drier and sunnier days, with around 72 mm (2.8 in) of rainfall 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 Bollegala Temperature page.

Bollegala's average annual precipitation is 2654 mm (104 in). Let's compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages 964 mm (38 in), with snowy winters and rainy summers.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.

Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.

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.

Precipitation has a very strong role in determining the local climate and ecosystem:

• 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.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

For more detailed information about Bollegala's weather, including sunshine hours, humidity levels, and temperature data, visit our Bollegala Climate page.