August weather forecast
Porto Velho, Brazil

The last month of the winter, August, is a fiery hot month in Porto Velho, Brazil, with an average temperature ranging between max 36.4°C (97.5°F) and min 21.7°C (71.1°F).

Temperature

With the onset of August, the average high-temperature registers at a torrid 36.4°C (97.5°F), subtly different from July's 33.8°C (92.8°F). Significant dips from daytime highs mark the August nights in Porto Velho, with a consistent average temperature of 21.7°C (71.1°F).

Heat index

For August, the heat index is estimated at a burning hot 46°C (114.8°F). Be careful: Heat exhaustion and heat cramps are probable. Heatstroke may result from extended activity.
Heat index specifics point out values are for conditions of shade and a slight breeze. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. 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. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

With an average relative humidity of 53%, August is the least humid month.

Rainfall

In Porto Velho, in August, during 6.5 rainfall days, 11mm (0.43") of precipitation is typically accumulated. Throughout the year, in Porto Velho, there are 251.1 rainfall days, and 1471mm (57.91") of precipitation is accumulated.

Daylight

In August, the average length of the day is 11h and 50min.
On the first day of the month, sunrise is at 06:29 and sunset at 18:14. On the last day of August, in Porto Velho, sunrise is at 06:17 and sunset at 18:14 -04.

Sunshine

The average sunshine in August in Porto Velho is 9.7h.

UV index

The months with the highest UV index in Porto Velho are May through November, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: In August, a regular UV index of 7 translates into these guidelines:
Guard against overexposure. Protection from sun-induced harm is essential. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.