Rajagiriya Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Rajagiriya. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Rajagiriya has a notably wet climate with abundant precipitation, recording 2633 mm of rainfall per year.

Monthly Precipitation Levels

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

Rajagiriya can be quite wet during October, receiving approximately 358 mm of precipitation over 16 rainy days.

In contrast January, experiences much drier conditions, with 72 mm of rainfall, spread across 5 rainy days.

October, the wettest month, has a maximum daytime temperature of 30°C. The city receives 202 hours of sunshine in this period. During the driest month January you can expect a temperature of 32°C. For more detailed insights into the city’s temperatures, visit our Rajagiriya Temperature page.

Annual Precipitation in Sri Lanka

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.

Amsterdam Precipitation Compared World Wide

Rajagiriya’s average annual precipitation is 2633 mm. Let’s compare this to some popular worldwide tourist destinations:

New York City, USA, receives 1276 mm of rainfall annually, with precipitation evenly distributed throughout the year.

In Seoul, South Korea, the average annual precipitation is 1237 mm, with most rain falling during the summer monsoon season.

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

Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

How is Precipitation Measured?

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.

Interesting weather facts

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm 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 Rajagiriya’s weather, including sunshine hours, humidity levels, and temperature data, visit our Rajagiriya Climate page.