Puerto Rico Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Puerto Rico, Misiones, Argentina. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.

Puerto Rico experiences significant rainfall throughout the year, averaging 1913 mm (75 in) of precipitation annually. However, this abundant rainfall is not evenly distributed, with a distinct rainy season during certain months. You can clearly see this in our monthly precipitation graphs below.

Monthly Precipitation Levels

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

The climate in Puerto Rico shows significant variation throughout the year. Expect 215 mm (8.5 in) of precipitation during the wettest month October, distributed over 10 rainy days.

In contrast, August offers drier and sunnier days, with around 94 mm (3.7 in) of rainfall over 9 rainy days.

October, the wettest month, has a maximum daytime temperature of 29°C (84°F). During the driest month August you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our Puerto Rico Temperature page.

Puerto Rico's average annual precipitation is 1913 mm (75 in). Let's compare this to some popular worldwide tourist destinations:

The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.

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

In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.

Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.

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 proximity of a location to a large body of water can significantly affect its rainfall patterns:

• Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
• Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.

• 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 Puerto Rico's weather, including sunshine hours, humidity levels, and temperature data, visit our Puerto Rico Climate page.