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

This page shows the average amount of rainfall per month in Castries. 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.

Generally, Castries receives mid-range precipitation levels, with 948 mm annually.

Monthly Precipitation Levels

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

Castries can be quite wet during October, receiving approximately 133 mm of precipitation over 18 rainy days.

In contrast February, experiences much drier conditions, with 36 mm of rainfall, spread across 13 rainy days.

October, the city’s wettest month, has a maximum daytime temperature of 31°C and receives 214 hours of sunshine. During the driest month February you can expect a temperature of 29°C. For more detailed insights into the city’s temperatures, visit our Castries Temperature page.

Annual Precipitation in Saint Lucia

The map below shows the annual precipitation across Saint Lucia. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Castries’s average annual precipitation is 948 mm. Let’s compare this to some popular worldwide tourist destinations:

Athens, Greece, receives an average annual precipitation of 400 mm, making it one of the drier Mediterranean climates with rainfall mostly in winter.

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

In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.

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

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.

Global Precipitation Patterns

Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm of rain annually.

Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.

Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.

Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm, with some areas receiving as little as 50 mm annually.

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