Manaus
Brazil
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Manaus, Brazil

Cloudy skies above the Amazon Theatre building in Manaus, Brazil
Cloudy skies above the Amazon Theatre building in Manaus, Brazil
The last month of the winter, August, is another tropical month in Manaus, Brazil, with average temperature ranging between max 32.6°C (90.7°F) and min 23°C (73.4°F).

Temperature

In Manaus, the average high-temperature is practically the same as in July - a still tropical 32.6°C (90.7°F). In August, the average low-temperature is 23°C (73.4°F).

Heat index

The average heat index is evaluated at a life-threatening hot 45.2°C (113.4°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, metabolic differences, wind, and clothing affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

August is the month with the least rainfall in Manaus. Rain falls for 6 days and accumulates 47.3mm (1.9") of precipitation.

Daylight

The average length of the day in Manaus is 12h.

Sunshine

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

UV index

January through May, August through December, with an average maximum UV index of 12, are months with the highest UV index in Manaus. A UV Index reading of 11, and higher, represents an extreme threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In August, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise.

What is the temperature in August in Manaus?

In August, the average high-temperature is 32.6°C (90.7°F), and the average low-temperature is 23°C (73.4°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines relative humidity and air temperature, in August is calculated to 45.2°C (113.4°F).

What are the least humid months in Manaus?

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

What is the average humidity in August in Manaus?

In August, the average relative humidity in Manaus is 77%.

How many days does it rain in August in Manaus?

In Manaus, during August, the rain falls for 6 days and regularly aggregates up to 47.3mm (1.9") of precipitation.

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 47.3mm (1.9") of precipitation.

What is the average length of the day in August in Manaus?

In Manaus, Brazil, the average length of the day in August is 12h.

What month has the most sunshine in Manaus?

The month with the most sunshine in Manaus is August, with an average of 7.3h of sunshine.

How many hours of sunshine does Manaus have in August?

The average sunshine in August in Manaus is 7.3h.

When is the highest UV index in Manaus?

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

What is the UV index intensity in August in Manaus?

In August, the average daily maximum UV index is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in August - Manaus, Brazil
  • Average high temperature in August: 32.6°C

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).

  • Average low temperature in August: 23°C

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 in August - Manaus, Brazil
  • Average humidity in August: 77%

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

Average rainfall in August - Manaus, Brazil
  • Average rainfall in August: 47.3mm

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

Average rainfall days in August - Manaus, Brazil
  • Average rainfall days in August: 6 days

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

Average daylight in August / Average sunshine in August - Manaus, Brazil
  • Average daylight in August: 12h

Months with the longest days are January, November and December (Average daylight: 12.3h).
The month with shortest days is June (Average daylight: 11.9h).

  • Average sunshine in August: 7.3h

The month with most sunshine is August (Average sunshine: 7.3h).
The month with least sunshine is February (Average sunshine: 3.1h).

Average UV index in August - Manaus, Brazil
  • Average UV index in August: 12

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).