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

This page shows the average amount of rainfall per month in Nallathanniya. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s explore all the details to give you a full picture.

Nallathanniya is known for its substantial rainfall, with annual precipitation reaching 4266 mm.

Monthly Precipitation Levels

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

The seasons in Nallathanniya, bring significant changes in precipitation. The wettest month, November, receives heavy rainfall, with an average of 624 mm of precipitation.

This rainfall is distributed across 16 rainy days. In contrast, the driest month, August, experiences much less rainfall, totaling 234 mm over 12 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

November, the wettest month, has a maximum daytime temperature of 28°C. The city receives 211 hours of sunshine in this period. During the driest month August you can expect a temperature of 27°C. For more detailed insights into the city’s temperatures, visit our Nallathanniya 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

Nallathanniya’s average annual precipitation is 4266 mm. Let’s compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm, spread fairly evenly throughout the year.

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

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

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.

How Does Precipitation Affect Local Climate?

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

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

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