August weather forecast
Manaus, Brazil

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. Though the city remains busy, the clear skies above add to a picturesque experience, making it an ideal time for sightseeing and exploring nature. The Amazon River maintains a constant allure, with visitors taking advantage of good weather for boat trips.

Temperature

Manaus's transition from July to August introduces an average high-temperature of a still hot 32.6°C (90.7°F), marking an insignificant variation from the 31.3°C (88.3°F). Manaus experiences a mean low-temperature of 23°C (73.4°F) during August.

Heat index

August's mean heat index is calculated to be a blazing hot 45°C (113°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

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

Rainfall

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

Daylight

In August, the average length of the day in Manaus is 12h and 1min.
On the first day of the month, sunrise is at 06:06 and sunset at 18:05. On the last day of August, in Manaus, sunrise is at 05:58 and sunset at 18:01 -04.

Sunshine

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

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 estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum daily UV index of 12 during August morphs into the following directions:
Enforce all necessary precautions, unprotected skin might burn swiftly. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. A broad-spectrum sunscreen of SPF 30+ should be used liberally and reapplied every two hours or post an outdoor workout or swim.