Castries Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Castries, Castries, Saint Lucia. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's break down all the details for a clearer picture.
On average, Castries receives a reasonable amount of rainfall, with an annual precipitation of 948 mm (37 in). Despite this overall moderate level, the city experiences distinct dry season during certain months throughout the year, as illustrated in the precipitation charts below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Castries can be quite wet during October, receiving approximately 133 mm (5.2 in) of precipitation over 18 rainy days.
In contrast February, experiences much drier conditions, with 36 mm (1.4 in) of rainfall, spread across 13 rainy days.
October, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 214 hours of sunshine in this period. During the driest month February you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our Castries Temperature page.
Explore Castries's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Castries spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Saint Lucia: City Comparison
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.
heavy rainfall
high
moderate
low
almost none
Castries vs World: Rainfall Compared
Castries's average annual precipitation is 948 mm (37 in). Let's compare this to some popular worldwide tourist destinations:
In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
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.
- 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 Castries's weather, including sunshine hours, humidity levels, and temperature data, visit our Castries Climate page.
