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

This page shows the average amount of rainfall per month in Bayamon. The numbers are calculated over a 30-year period to provide a reliable average. Let's now guide you through the details for a complete overview.

Bayamon experiences significant rainfall throughout the year, averaging 1131 mm of precipitation annually.

Monthly Precipitation Levels

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

The seasons in Bayamon, bring significant changes in precipitation. The wettest month, September, receives high rainfall, with an average of 155 mm of precipitation.

This rainfall is distributed across 18 rainy days. In contrast, the driest month, February, experiences much less rainfall, totaling 45 mm over 15 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

September, the wettest month, has a maximum daytime temperature of 31°C. The city receives 236 hours of sunshine in this period. During the driest month February you can expect a temperature of 29°C. For more detailed insights into the city’s temperatures, visit our Bayamon Temperature page.

Annual Precipitation in Puerto Rico

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

Amsterdam Precipitation Compared World Wide

Bayamon’s average annual precipitation is 1131 mm. Let’s compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 620 mm, evenly distributed across the year with no extreme wet or dry seasons.

In Seoul, South Korea, the average annual precipitation is 1237 mm, with most rain falling during the summer monsoon season.

In Tokyo, Japan, the average annual precipitation is 1528 mm, with significant summer rains due to typhoon season.

Singapore, situated near the equator, gets 2581 mm of rainfall annually, with no distinct dry season and consistent monthly precipitation.

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.

Interesting weather facts

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm per year, with some years recording virtually no rainfall.
• Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.

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