September weather forecast
Barreirinhas, Brazil

The first month of the spring, September, is also a hot month in Barreirinhas, Brazil, with an average temperature varying between 31.5°C (88.7°F) and 25°C (77°F).

Temperature

Barreirinhas starts September with an average high-temperature of a still hot 31.5°C (88.7°F), hinting at a minimal fluctuation from August. In Barreirinhas, the average low-temperature during the month of September is a moderately hot 25°C (77°F).

Heat index

Throughout September, the heat index is appraised at a sweltering 39°C (102.2°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The least humid month in Barreirinhas is September, with an average relative humidity of 71%.

Rainfall

In Barreirinhas, in September, during 5.2 rainfall days, 9mm (0.35") of precipitation is typically accumulated. Throughout the year, there are 225.4 rainfall days, and 1281mm (50.43") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 6min.
On the first day of September in Barreirinhas, Brazil, sunrise is at 05:49 and sunset at 17:52. On the last day of the month, sunrise is at 05:37 and sunset at 17:45 -03.

Sunshine

In September, the average sunshine is 9.4h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 suggests this advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.