Macapá Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Macapá, Amapá, Brazil. 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.

Macapá has a notably wet climate with abundant precipitation, recording 2491 mm (98 in) of rainfall per year. It does, however, have a distinct dry and rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, April receives substantial rainfall, averaging 400 mm (16 in) of precipitation, recorded across 28 rainy days.

In contrast, the driest month, October brings less rainfall, with 26 mm (1 in) over 8 rainy days.

April, the wettest month, has a maximum daytime temperature of 30°C (86°F). The city receives 127 hours of sunshine in this period. During the driest month October you can expect a temperature of 34°C (93°F). For more detailed insights into the city's temperatures, visit our Macapá Temperature page.

Macapá's average annual precipitation is 2491 mm (98 in). Let's compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm (33 in), spread fairly evenly throughout the year.

In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.

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

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.

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

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) 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 Macapá's weather, including sunshine hours, humidity levels, and temperature data, visit our Macapá Climate page.