Climate and monthly weather forecast
Manaus, Brazil

Cloudy skies above the Amazon Theatre building in Manaus, Brazil
Cloudy skies above the Amazon Theatre building in Manaus, Brazil

The climate of Manaus

Taking into account the Köppen climate classification, Manaus in Brazil is characterized by an Af or Tropical Rainforest climate. This city, situated in the heart of the Amazon rainforest, experiences high humidity, significant rainfall, and consistently high temperatures throughout the year.

Throughout the annual cycle, the temperatures in Manaus remain relatively stable. High temperatures fluctuate marginally from 30.4°C (86.7°F) in February to a peak value of 32.9°C (91.2°F) in September. Low temperatures, likewise, vary only subtly, ranging from 22.7°C (72.9°F) in July to 23.7°C (74.7°F) in October and November. These values highlight the city's tropical climate, noted for its consistently warm temperatures.

Manaus receives a considerable amount of rainfall, with average monthly totals stretching from a minimum of 47mm (1.85") in August to an impressive 335mm (13.19") in March. Correspondingly, the number of rainfall days alters from 6 days in August and September to as many as 20 days in March. This information underscores the city's tropical rainforest climate, which includes regular, intense rainfall.

As to be expected in a tropical setting, relative humidity remains high, with monthly averages reaching from 77% in August and September, peaking at 88% in March. The city experiences around 12 hours of daylight throughout the year, with minor variations. The number of sunshine hours extends from 3.1 hours in February to a maximum of 7.3 hours in August. UV index values remain at a consistently high level, indicative of the city's proximity to the equator.

The best time to visit Manaus

Given its tropical rainforest climate, the optimal time to visit Manaus would be during the drier months when rainfall and humidity are at their lowest. With a drop in rainfall to 47mm (1.85") and reduced rainfall days to 6, August offers the driest conditions. Moreover, August also sees an increase in sunshine hours to 7.3 hours daily, coupled with lower relative humidity levels at 77%.

The worst time to visit Manaus

Conversely, the unfavorable period for tourism in Manaus stretches from February to April. These months record the highest rainfall measurements, with March topping at 335mm (13.19") over a span of 20 days. Additionally, these months exhibit the highest relative humidity levels, peaking at 88% in March, potentially posing discomfort to visitors not accustomed to such conditions.

Spring weather in Manaus

In Manaus, spring months from September to November witness high temperatures ranging from 32.9°C (91.2°F) down to 31.3°C (88.3°F) and low temperatures floating between 23.7°C (74.7°F) to 23°C (73.4°F). Rainfall begins to increase during this period, with an elevation from 74mm (2.91") in September to 174mm (6.85") in November across 9 to 12 days of rainfall. However, relative humidity levels and daily sunshine hours slightly decrease, providing somewhat comfortable conditions for outdoor activities.

Summer weather in Manaus

During the summer period in Manaus, between December and February, high temperatures range from 31.3°C (88.3°F) to 30.4°C (86.7°F), while low temperatures rest around 23.5°C (74.3°F) to 23.1°C (73.6°F). This season is particularly wet, with rainfall of 220mm (8.66") in December, escalating to 290mm (11.42") in February over 16 to 18 rainfall days. Coupled with higher relative humidity levels and fewer sunshine hours, summer days can feel intensely humid and damp.

Autumn weather in Manaus

Autumn in Manaus spans from March to May, with high temperatures fluctuating between 30.6°C (87.1°F) and 30.6°C (87.1°F) and low temperatures from 23.1°C (73.6°F) to 23.3°C (73.9°F). March sees the highest rainfall of 335mm (13.19") over 20 days and the most elevated relative humidity levels at 88%. As May approaches, these measurements decrease, allowing for more sunshine hours and fewer rainfall days.

Winter weather in Manaus

Winter, from June to August, presents high temperatures ranging from 32.6°C (90.7°F) down to 31°C (87.8°F) and low temperatures between 23°C (73.4°F) and 22.7°C (72.9°F). June sees a substantial drop in rainfall to 115mm (4.53") over 11 days, dropping further in August to 47mm (1.85") over 6 days. Coupled with lowering relative humidity and enhancing sunshine hours, this marks the onset of a relatively drier period in the city.

Weather in January

The beginning of a new year brings humid weather to Manaus, Brazil, making the experience slightly sultry and tropical. January tends to be warm, with the average high temperature peaking at 30.5°C (86.9°F), presenting a perfect opportunity for beach-goers and sun-seekers. Weather in January »

Weather in February

The transition from January to February does not see much change in weather conditions. February is equally humid and warm as the preceding month, yet rainfall is slightly more abundant. This period is characetized by an average temperature high of 30.4°C (86.7°F). Weather in February »

Weather in March

Marking the end of the first quarter of the year, March in Manaus experiences the highest recorded rainfall of 335mm (13.19") spanning over 20 days of the month. While the weather becomes cloudier and rainier, it does not lose its warm temperature appeal. Weather in March »

Weather in April

The pace of travel begins to slow in April due to less sunshine hours. Weather becomes marginally cooler, yet maintains its tropical appeal. Sunshine hours decline to three hours and rainfall remains relatively high. Visitors during this period should remember to carry their umbrellas to negotiate the intermittent downpours without disrupting their plans. Weather in April »

Weather in May

May presents a gradual transition in weather patterns in Manaus, Brazil, with an upturn in sunshine hours to 4.8 per day. It is slightly drier than the preceding months but continues to exhibit a tropical climate. The city springs into a vibrant hub of recreational activities. Weather in May »

Weather in June

June brings the winter season to Manaus, but being near the equator, temperatures remain high at 31°C (87.8°F). The weather is drier with comparatively less rainfall and more sunshine hours. Outdoor activities such as local short trekking, wildlife watching or visiting waterfalls become more accessible. Weather in June »

Weather in July

July is the driest month of the year, experiencing only 85mm (3.35") of rain, offering a more comfortable climate for exploring the city. Weather becomes less humid and slightly cooler, making sightseeing and outdoor activities more enjoyable. Weather in July »

Weather in August

August in Manaus continues the trend of drier weather established in July. With an average low temperature of 23°C (73.4°F), evenings and nights become more comfortable. The combination of dry weather, high temperatures and the city's exuberant festival period make for an exhilarating experience. Weather in August »

Weather in September

September is a transitional period as the city starts to experience the onset of the wet season. Temperature highs rise further to 32.9°C (91.2°F) but offer a decent amount of sunshine hours. Rainfall begins to increase compared to the summer months however the high temperatures and clear periods make the weather bearable. Weather in September »

Weather in October

October sees the official arrival of the wet season in Manaus. The weather is characterized by average high temperatures of 32.8°C (91°F). High humidity levels, combined with high temperatures, provide classic tropical weather. Weather in October »

Weather in November

November in Manaus is a month characterized by high humidity levels, with an average relative humidity of 81%. Rainy days increase significantly and temperatures begin to decrease, making the climate slightly more moderate. Accommodating for the intermittent rain, city dwellers and visitors alike enjoy warm, cozy interiors. Weather in November »

Weather in December

December rounds out the year with weather trends consistent with those observed in November. High temperatures prevail at 31.3°C (88.3°F) and heavy showers are characteristic of the tropical wet season. Even though December has fewer daylight hours, it possesses a unique charm. Weather in December »

Frequently asked questions

How much does it rain in Manaus?

Throughout the year, in Manaus, Brazil, there are 160 rainfall days, and 2307mm (90.83") of precipitation is accumulated.

What is the month with the highest UV index in Manaus?

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index in Manaus.

What time of the year is the coldest in Manaus?

February, with its high-temperature average of 30.4°C (86.7°F) and a low-temperature average of 23.1°C (73.6°F), is the coldest month.

What is the month with the least sunshine in Manaus?

February has the least sunshine of the year in Manaus, Brazil, with an average of 3.1h of sunshine.

What is the most humid month in Manaus?

The most humid month is March, with an average relative humidity of 88%.

What is the rainiest month in Manaus?

March is the month with the most rainfall. Rain falls for 20 days and accumulates 335mm (13.19") of precipitation.

What is the month with the shortest days in Manaus?

June has the shortest days of the year in Manaus, Brazil, with an average of 11h and 54min of daylight.

When is the lowest UV index in Manaus?

With an average maximum UV index of 10, July is the month with the lowest UV index.

What is the least humid month in Manaus?

The months with the lowest humidity in Manaus, Brazil, are August and September, with an average relative humidity of 77%.

What is the driest month in Manaus?

The month with the least rainfall is August, when the rain falls for 6 days and typically collects 47mm (1.85") of precipitation.

What month has the most sunshine in Manaus?

With an average of 7.3h of sunshine, August has the most sunshine of the year.

What is the warmest month in Manaus?

The average temperatures reach their apex in September, averaging 32.9°C (91.2°F) at the high end and 23.5°C (74.3°F) at the low end.

When are the longest days in Manaus?

The month with the longest days in Manaus is December, with an average of 12h and 18min of daylight.

Is there Daylight Saving Time (DST) in Manaus?

Manaus, Brazil, does not observe Daylight Saving Time (DST). -04 timezone is used over the entire year.

Average temperature
Manaus, Brazil

Average temperature - Manaus, Brazil

The warmest month (with the highest average high temperature) is September (32.9°C).
The month with the lowest average high temperature is February (30.4°C).

The months with the highest average low temperature are October and November (23.7°C).
The coldest month (with the lowest average low temperature) is July (22.7°C).


Average humidity
Manaus, Brazil

Average humidity - Manaus, Brazil

The month with the highest relative humidity is March (88%).
The months with the lowest relative humidity are August and September (77%).


Average rainfall
Manaus, Brazil

Average rainfall - Manaus, Brazil

The wettest month (with the highest rainfall) is March (335.4mm).
The driest month (with the least rainfall) is August (47.3mm).


Average rainfall days
Manaus, Brazil

Average rainfall days - Manaus, Brazil

The month with the highest number of rainy days is March (20 days).
The months with the least rainy days are August and September (6 days).


Average daylight / Average sunshine
Manaus, Brazil

Average daylight / Average sunshine - Manaus, Brazil

The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 11h and 54min).

The month with the most sunshine is August (Average sunshine: 7h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 6min).


Average UV index
Manaus, Brazil

Average UV index - Manaus, Brazil

The months with the highest UV index are January, February, March, April, May, August, September, October, November and December (UV index 12).
The month with the lowest UV index is July (UV index 10).


Manaus, Brazil

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