Manaus Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Manaus, Amazonas, Brazil. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.
Manaus has a relatively rainy climate with high precipitation levels, averaging 3018 mm (119 in) of rainfall annually. Despite the high annual total, it does experience a distinct rainy season during certain months. Examine our detailed charts below to understand these seasonal patterns.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The seasons in Manaus, bring significant changes in precipitation. The wettest month, March, receives heavy rainfall, with an average of 396 mm (16 in) of precipitation. This rainfall is distributed across 30 rainy days.
In contrast, the driest month, August, experiences much less rainfall, totaling 110 mm (4.3 in) over 11 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.March, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 97 hours of sunshine in this period. During the driest month August you can expect a temperature of 33°C (91°F). For more detailed insights into the city's temperatures, visit our Manaus Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Manaus's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Manaus spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Brazil: City Comparison
The map below shows the annual precipitation across Brazil. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Manaus vs World: Rainfall Compared
Manaus's average annual precipitation is 3018 mm (119 in). Let's compare this to some popular worldwide tourist destinations:
Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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.
Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm (118 in) of rain annually.
Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm (9.8 in) of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.
Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.
Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm (7.9 in), with some areas receiving as little as 50 mm (2 in) annually.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Manaus's weather, including sunshine hours, humidity levels, and temperature data, visit our Manaus Climate page.
