July weather forecast
Porto Velho, Brazil

July, like June, is another tropical winter month in Porto Velho, Brazil, with an average temperature varying between 20.3°C (68.5°F) and 33.8°C (92.8°F).

Temperature

In July, Porto Velho's weather conditions record an average high-temperature of a still tropical 33.8°C (92.8°F), demonstrating little divergence from the preceding month. Throughout July, Porto Velho braces for a considerable drop from daytime highs, with an average low-temperature of 20.3°C (68.5°F).

Heat index

The heat index for July is estimated at a blisteringly hot 43°C (109.4°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.
Heat index specifics point out values are for conditions of shade and a slight breeze. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In July, the average relative humidity is 63%.

Rainfall

The month with the least rainfall is July, when the rain falls for 5.8 days and typically collects 8mm (0.31") of precipitation.

Daylight

In July, the average length of the day is 11h and 40min.
On the first day of the month, sunrise is at 06:30 and sunset at 18:08. On the last day of July, sunrise is at 06:29 and sunset at 18:14 -04.

Sunshine

The average sunshine in July is 9.6h.

UV index

The months with the highest UV index are May through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the maximum UV index of 7 suggests these recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.