San Andrés Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows both the average monthly rainfall and the number of rainy days in San Andrés, San Andres and Providencia Islands, Colombia. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let’s explore all the details to give you a full picture.

San Andrés has a relatively rainy climate with high precipitation levels, averaging 2011 mm of rainfall annually.

Monthly Precipitation Levels

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

The climate in San Andrés shows significant variation throughout the year. Expect 306 mm of precipitation during the wettest month October, distributed over 22 rainy days.

In contrast, March offers drier and sunnier days, with around 30 mm of rainfall over 8 rainy days.

October, the wettest month, has a maximum daytime temperature of 29°C. The city receives 177 hours of sunshine in this period. During the driest month March you can expect a temperature of 28°C. For more detailed insights into the city’s temperatures, visit our San Andrés Temperature page.

Annual Precipitation in Colombia

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

Amsterdam Precipitation Compared World Wide

San Andrés’s average annual precipitation is 2011 mm. Let’s compare this to some popular worldwide tourist destinations:

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

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

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

Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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 San Andrés’s weather, including sunshine hours, humidity levels, and temperature data, visit our San Andrés Climate page.