September weather forecast
Barreirinha, Brazil

The first month of the spring, September, is still a torrid month in Barreirinha, Brazil, with an average temperature ranging between min 23.6°C (74.5°F) and max 36.9°C (98.4°F).

Temperature

Barreirinha's warmest weather arrives in September, when temperatures average a high of 36.9°C (98.4°F) and a low of 23.6°C (74.5°F).

Heat index

The average heat index in September is estimated at a life-threatening hot 49°C (120.2°F). Mind: Heat cramps along with heat exhaustion are anticipated. Heatstroke can develop with continued physical activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

With an average relative humidity of 56%, September is the least humid month.

Rainfall

In Barreirinha, in September, during 10.6 rainfall days, 13mm (0.51") of precipitation is typically accumulated. In Barreirinha, during the entire year, the rain falls for 201.8 days and collects up to 607mm (23.9") of precipitation.

Daylight

In September, the average length of the day in Barreirinha is 12h and 6min.
On the first day of the month, sunrise is at 05:46 and sunset at 17:49. On the last day of September, in Barreirinha, sunrise is at 05:34 and sunset at 17:42 -04.

Sunshine

The average sunshine in September in Barreirinha is 9.4h.

UV index

The average daily maximum UV index in September in Barreirinha is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: A daily high UV index of 7 in September leads to these guidelines:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.