Saint Barthélemy Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Saint Barthélemy. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s explore all the details to give you a full picture.

Generally, Saint Barthélemy experiences moderate precipitation patterns, averaging 905 mm yearly.

Monthly Precipitation Levels

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

Saint Barthélemy can be quite wet during October, receiving approximately 138 mm of precipitation over 20 rainy days.

In contrast March, experiences much drier conditions, with 31 mm of rainfall, spread across 13 rainy days.

October, the city’s wettest month, has a maximum daytime temperature of 29°C and receives 251 hours of sunshine. During the driest month March you can expect a temperature of 27°C. For more detailed insights into the city’s temperatures, visit our Saint Barthélemy Temperature page.

Annual Precipitation in Saint Barthélemy

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

Amsterdam Precipitation Compared World Wide

Saint Barthélemy’s average annual precipitation is 905 mm. Let’s compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm, characterized by wet winters and dry summers typical of the Mediterranean climate.

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

Melbourne, Australia, has 690 mm of rainfall annually, spread fairly evenly throughout the year.

Kuala Lumpur, Malaysia, receives 2529 mm of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.

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.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

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