Port-of-Spain Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Port-of-Spain, Trinidad, Trinidad & Tobago. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.

Port-of-Spain has a relatively rainy climate with high precipitation levels, averaging 1094 mm (43 in) of rainfall annually. Despite the high annual total, it does experience a distinct dry season during certain months. Examine our detailed charts below to understand these seasonal patterns.

Monthly Precipitation Levels

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

Port-of-Spain can be quite wet during August, receiving approximately 150 mm (5.9 in) of precipitation over 22 rainy days.

In contrast March, experiences much drier conditions, with 29 mm (1.1 in) of rainfall, spread across 9 rainy days.

August, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 215 hours of sunshine in this period. During the driest month March you can expect a temperature of 29°C (84°F). For more detailed insights into the city's temperatures, visit our Port-of-Spain Temperature page.

Port-of-Spain's average annual precipitation is 1094 mm (43 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 1000 mm (39 in) of annual rainfall, mostly in the summer.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

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.

• 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 Port-of-Spain's weather, including sunshine hours, humidity levels, and temperature data, visit our Port-of-Spain Climate page.